The SAS code is as follows: Data Null;Both dif and yrdif _func give the same result up to 6 digits after the comma in the example above. The resulting quality of life data are stored in a permanent SAS data set called qul . FedSQL Statements. SAS calculates this value as the number of days that fall in 365-day years divided by 365 plus the number of days that. B and C. In seventh chapter i gathered knowledge about using conditional statements such as IF, ELSE IF, WHERE, SELECT , sub-setting with the help of the above statements and using. YRDIF 209 . PROC SQL; %DO k=1 %TO 50; CREATE TABLE NewTable&k. Note I embedded the YRDIF function in the FLOOR function, assuming you want age as integers. I've the following code. The simple way using 365. So you know have: manager_emp_id employee_id salary and AGE/DOB (all missing), and then you drop more variables:396 INTNX Function To apply multiples of an interval to a date value, use the INTNX function and specify the interval constant or variable, the start-from date value, and the increment. ' just like the below figure. The appropriate format to use for SAS date or datetime valued ID variables depends on the sampling frequency or periodicity of the time series. SESUG 2019 Conference • Williamsburg, VA • October 20-22, 2019 ‹#›. e. The YRDIF function requires three arguments: the starting date of an interval; the ending date of an interval; the method to be used to calculate the interval. Manage Data Sort observations in a SAS data set. (date () - col_C) as age_bucket. This can be done on a per row/case basis and then I can sum using proc sql, but I'm thinking there may be a simpler way to do this, as I said. act/act基準を使用するyrdif計算では、365日の年と366日の年の両方が考慮されます。たとえば、n365が365日の年の開始日から終了日までの日数と等しく、n366が366日の年の開始日から終了日までの日数と等しい場合、yrdif計算は yrdif=n365/365. If COL_C has a DATETIME value (number of seconds since 1960) then first convert it to a DATE value. The newly created variable new_x is in numeric format. The PROC statement would immediately end the data step, if the preceding IF had been properly terminated with a semicolon. That said, AGE is not very granular, particularly for infants, where the time lapse between age 0 and age 1 can be as much as two years. QUERY_FOR_TABLE AS SELECT t1. Thanks in advance. The variable current3 is assigned the 95th day of the 2008 year using the datejul( ) function. 注意： 可以看到，length year month day $10;虽然规定了year month day的长度，但cats将多余的空格去掉了；而对于缺失的数据，仍然进行了拼接； catx函数 函数结构：catx(sep，str1, str2, str3,. 07, the total interest is 1,670,206. c. Must be enclosed in single or double quotes. 2. As in data, We have partial birthdate i. SAS/IML Software and Matrix Computations. table, the newAge is the age of customer as of today using SAS function YRDIF (Birthday, today(), 'AGE'). We would like to show you a description here but the site won’t allow us. sas /* Group 12 Mahima Devendrabhai Chhagani ID:143220200 Ekta Narendrabhai1. No other values for basis are val. You either need to include this information in your connection definition or in your SQL. As would be generally appropriate, the YRDIF function does not include the last day of the interval (the date of the second argument) when counting the total number of days. %let a = 10; %macro filter_age(age_start, age_end); %local today_; %let toda. FedSQL Informats. DATEJUL( yyddd) returns the SAS date value when given the Julian date in yyddd or yyyyddd format. The first two arguments, start-date and end-date, are required. Here's how YRDIF works (and I got this from an internal doc written by the developer, who apparently fields questions from leap-year-pedants all of. is a numeric constant, variable, or expression with an integer value that specifies the position at which the search should start and the direction of the search. Effective Reporting and Record-Keeping in Health and Social Care Services85810739. SAS Interface to Application Response Measurement (ARM). ; PROC SQL; CREATE TABLE WORK. 0000000" then they are probably character strings as most SAS datetime. When I finish all my data manipulation, I want the output displayed as an 8-character date (ie 20150819). Calculating a Person’s Age using YRDIF function. Cette valeur permet d'indiquer d'utiliser le nombre actuel de jours entre les dates dans le calcul du nombre d'années en divisant le nombre de jours en 365 par année. To know the interval between two dates in Years: data _null_;The SAS INTCK Function: Syntax. The option, yrunit (age), like the SAS function yrdif with basis 'AGE' calculates the. The following values for basis are valid: '30/360' specifies a 30-day month and a 360-day year, regardless of the actual number of calendar days in a month or year. For example I have a diagnosis date of 31Jan2002 and a year of birth 1964. YRDIF returns the difference between two dates according to specified day count conventions. informat for date. 19:08 – SAS Times Explored. 0). IntegerType ()) #This is the UDF. References. 健保資料庫【系列5-5】計算 (年齡+日期)、轉換變數及健康資料常用的統計檢定、圖表. diff_months_cont = intck ('month', mydate1, mydate2, 'C'); run; If you set the method argument equal to ‘C’ when you calculate the difference in months, SAS calculates the number of complete months between two dates. 11 #8 Takes the data and merges it into dates. data new_data; set original_data; new_value1 = round (value, . YYQ Function. This page is a complete repository of statistics tutorials which are useful for learning basic, intermediate, advanced Statistics and machine learning algorithms with SAS, R and Python. Just like the fancy texts mentioned above, our Fancy Text Generator offers over 30+ fancy text styles for the name "Urdif". X years. The steps to use the YEARFRAC function are as follows: Open the YEARFRAC function. 11504. What does the number mean? The date value in SAS represents the number of days between January 1st, 1960 and a specified date, before is negative. If the date represented in the second argument is to be included in the interval an extra day should be added. proc sql; create table temp1 as select *, max(dob) as DOB_ALL from have group by patient_Id order by 1, 2, 3; quit;I guess that depends on how you define the word "easy". This can be done on a per row/case basis and then I can sum using proc sql, but I'm thinking there may be a simpler way to do this, as I said. 4. The resulting quality of life data are stored in a permanent SAS data set called qul . YYQ Function: Returns a SAS date value from year and quarter year values. This article describes the formula syntax and usage of the YEARFRAC function in Microsoft Excel. Please fix it. I am trying to write a macro that display age from 20-40 or >=30 only when it is passed as a parameter. total_cohort_ person_years_age_2 = XX. 基本; act/act基準を使用する計算; 人の年齢の計算; 会計アプリケーションでのyrdifの使用 基本. No other values for basis are valid when computing a person’s age. The variables current1 and current2 are assigned the current date using the date( )and today( ) functions. data _null_; sdate='16oct1998'd; edate='16feb2010'd;. SAS Interface to Application Response Measurement (ARM) Security. SAS is headed back to Vegas for an AI and analytics experience like no other! Whether you're an executive, manager, end user or SAS partner, SAS Innovate is designed for everyone on your team. how to use informats to read dates and times into a SAS data set. 01M7P. I need to remove duplicates with a condition on specimen_date. without days and months of births). 7677488. The lines 21 to 27 ar as below: 21 age_at_. Again, the YRDIF (Yrdif_fcn) function and 3 age formulas were programmed: the “standard calculation” (Std_age_calc); the adjusted calculation using the FLOOR function (Adj_form1); and the adjusted calculation using the INTCK function alone (Adj_form2). Hi, When trying to calculate the age using death and birth dates, leaves output as 50. No other values for basis are valid when computing a person’s age. 01JUL1991. The DATDIF function has a specific meaning in the securities industry, and the method of calculation is not the same as the actual day count method. Since the DATDIF and YRDIF involve some standard basis values used in specific financial calculations. sas. The following example returns the fraction of a year represented by the difference between the dates, January 1 and March 1: DAX. CV Function: Returns the coefficient of variation. types as T class Phases (): def __init__ (self, df1): print ("Inside the constructor of Class phases ") self. That can be costly. Go and check out all the styles for more fun! Urdif Name. 1. The documentation from SAS on the YRDIF function indicates to use the 'AGE' parameter rather than actual: I created a macro function to calculated age between two date and filtered data with specific time interval. ; start-date: a. T ake only the integer part of Age and discard the decimals using SAS function INT. That said, AGE is not very granular, particularly forward infants, where aforementioned time lapse between ages 0 and age 1 can be how more as two years. The age computation takes into account leap years. ;It covers some of the most important modeling and prediction techniques, along with relevant applications. 2 examples of R syntax in this paper use a data frame. The empty string produced by an undefined variable will produce an invalid expression, or at least a different expression than you expected will be evaluated. view-name indicates a SAS view of any type. When the date is or. AAGE Derived: YRDIF(BRTHDT, RANDDT, ‘AGE’). There are 31 days in March, therefore Days_in_Month = 31. 25. view-name indicates a SAS view of any type. (333) In Stock. register (“colsInt”, colsInt) is the name we’ll use to refer to the function. STEP1：在此步驟中主要將包含1,000人ID之1996年-2001年間CD檔門急診就診資料，共有76,163人次的就診紀錄資料依照”Parkinson’s disease”與”ID”排序之後歸戶。. Learning SAS Programming. leap day), YRDIF returns the correct age in years (age=4. Each ID Card has a unique Identity Number based on a combination of: (a) a sequential registration number in the relevant year; (b) the relevant year number (2 digits) where the year is the year of birth (for Malta-born persons) or year of registration (for non-Malta born persons) and (c) a letter. format. Therefore ROUND (x, 100) rounds x to the nearest 100. Note I embedded the YRDIF function in the FLOOR function, assuming you want age as integers. ) returns a SAS date value from the given year () 1, 2, 3, or 4. YRDIF - Given two SAS dates or datetimes, computes the difference between the dates in years. ) returns the day of the month. The YRDIF function want two date values. 4 Functions and CALL Routines: Reference, Fifth Edition documentation. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. 基本; act/act基準を使用する計算; 人の年齢の計算; 会計アプリケーションでのyrdifの使用 基本. Cette fonction retourne la différence d'année entre deux dates. X years. FedSQL. The reference to the variable "age15b" below was because when I tested the YRDIF method for age15 below without the INT function, the age resolved to 19. Includes unlimited streaming via the free Bandcamp app, plus high-quality. (Do not use days/365. These are such macro functions as %eval, %length, %quote, %scan, %str, %sysfunc, %upcase, etc. sas. AGE = iferror( YRDIF( birthdate, today(), 'ACTUAL'), 22); If the first argument is null or error, then the second argument is returned for AGE. It might be better to use either the YRDIF age with some decimal places preserved, or to count age. 七天搞定SAS（二）：基本操作（判断、运算、基本函数）. Thank you!! brth. Metadata. then B. You then apply a format to this number so it becomes human readable (=number prints as a date). This page lists all possible intervals. I'm trying to calculate the difference in years between two dates using the YRDIF function and the following syntax: DATA want; SET have; Yrdif_test = YRDIF(Part_RDATE, BH_Accomplished_Date, "Actual"); RUN; I am getting an "invalid argument" warning and all the values are missing. Second, I would like to derive age from the stated variable based on today’s date. One data set had a Birth Date variable and another data set had a Visit Date variable. AAGEGR1 Derived: If AAGE is missing then AAGEGR1 is missing; else if AAGE <41 then set to “< 41”; else if AAGE < 61 then set to “41-60”; else set to “61 or older”. On 31Dec2020 I would be 20 years old. It counts 29FEB birthdays on 28FEB instead of on 01MAR in non leap years. Returns the geodetic distance between two ZIP code locations. start-date: a Date or DateTime. I have an age variable and i need to recode it into categories. For more information about standard securities. set emp (keep=Manager_EMP_ID Employee_ID Salary); Then if you look at the data set option closely, it's a DROP. YRDIF returns the difference between two dates according to specified day count conventions. So use the MDY function to create date AGE=floor(YRDIF(mdy(1,1,RB080), today(),"AGE")); would use January 1 as the date in the year. Calculations can also be based on a 30-day month or a 360-day year. massage date values (what??!) ( ) returns today's date as a SAS date value. Re: Age from BirthDate! Posted 11-17-2015 01:39 PM (60902 views) | In reply to new_sas2015. Research and Science from SAS. X years. sas. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. total_cohort_ person_years_age_2 = XX. Conditionally execute SAS statements. That's why I came up with the macro. I have added answers to exercise sums (chapters 7 to 15 - even number problems) for Ron Cody's Learning SAS by Example Programmer's Guide. . data temp; x = '12345'; new_x = input (x,5. 3, and another variable with the floored results of the YRDIF function with the ACT/ACT basis. ,19450,'AGE') at line 80 column 15. 7677488 etc. However. Format all three using the MMDDYY10. System Options. The result is a NUM variable. Descriptive Statistics: CMISS Function: Counts the number of missing arguments. The informats for these two dates are. Usage Note 3036: YRDIF function returns unexpected results with partial leap year. Dictionary of SAS Functions and CALL Routines. N requires numeric arguments, whereas CMISS works with both numeric and character values. 2 • More accurate pricing of loan and fixed income portfolios based on discounted cash flow methods. The informats for these two dates are different. com. Trying to use yrdif to calculate how old the datasets would be today but it won't output correctly in SAS. Issue inputing sas date as datalines. dates; input Subj $ DOB: ddmmyy10. It evolved from a project called Nutch, which attempted to find a better open source way to crawl the web. format. Yes. Pre-built macro functions that are part of the macro processor. This only occurred for the children born 31Dec1996 using 31Dec2015 as a reference date. Attempting to calculate age, I did a bit of googling and discovered that yrdif was updated in 9. SAS Viya. Also the very useful Base SAS date functions such as intck and yrdif are not available. 6. Which date format should be specified to have the date variable appear in the following form: 15Mar2020 What's New in SAS 9. DATDIF(Start_date , End. Auto-call macro functions. DS2 Hash and Hash Iterator Package Attributes, Methods, Operators, and StatementsIntroduction. Mark as New; Bookmark; Subscribe; Mute; RSS Feed; Permalink; Print; Report Inappropriate Content; Re: INTCK to compute ageAyapparaj / Praxis Business School 8 Chapter 9 Working with Dates Chapter 9 Working with Dates /* 2. YRDIF: Stata module to calculate daily date differences. phases_udf = F. The start_date is the first argument, so select “Date 1” as the cell reference, A2 cell. Indeed, I would expect something more like this for January and February: data two; _start='01JAN2017'd; _end='15JAN2017'd; dif=(15*30/31)/360; output;The YRDIF function computes the difference in years between two dates. Apache Hadoop is one of the earliest and most influential open-source tools for storing and processing the massive amount of readily-available digital data that has accumulated with the rise of the World Wide Web. Accessibility for Base. SubscriberKey, Datepart(t1. They are equivalent and represents the number of days since January 1, 1960. The problem is that decimal months are not really defined; in fact, because some months have 30 days and some months have 31 days and some months have 28 or 29 days, I don't think you will find a unique answer, and I don't think there is anything programmed into SAS that will. If COL_C has a DATETIME value (number of seconds since 1960) then first convert it to a DATE value. sometimes birthdates such as full date(2000-12-12), only year+month(2000-12) or only year(2000) is available. PROC SQL < option (s) >; ALTER TABLE table-name. 4 Functions and CALL Routines: Reference, Fifth Edition documentation. For more information about standard. I match merged 4 data sets into one. 2 shows recommended formats for common data sampling frequencies and shows how the date ’17OCT1991’D or the datetime value ’17OCT1991:14:45:32’DT is. In other words, it returns the date value for 30APR1796. The first argument is the Start Date, so this will be the column Date. constraint-clause >>. Work in steps and keep the intermediate results, and delete those only when the space is needed later; SAS itself will take care. A) The two data sets must be in the same library. 3 Using round command for rounding them (values) along with yrdif function. SAS Viya on Microsoft Azure. e. libname DS2HOW '/mnt/seashare/SAS Programming Data/DS2'; /**Slides 43-45**/ proc ds2; data empsC(overwrite=yes); declare char(1) RetEligible; declare double Raise. 4. YRDIF returns a real number, so to get the age in its usual meaning you would use INT(YRDIF(start, end)) . SAS Viya Platform System Programming Guide. month_number=intck ('month',&start_date,mydate,'cont')+1; qtr_number=floor (. This can be done on a per row/case basis and then I can sum using proc sql, but I'm thinking there may be a simpler way to do this, as I said. Keep only those with enrollment dates;*/ 13 title "keep only enrolldate"; 14 data sample; 15 set lab6. . The module is made available under terms of the GPL v3 (. In contrast, the INTCK function counts the number of interval boundaries (here yearSAS Certification Part 13 DATDIF & YRDIFDATDIF FunctionDATDIF Function Returns the number of days between two dates after computing the difference between t. The YRDIF function requires three arguments: the starting date of an interval; the ending date of an interval; the method to be used to calculate the interval. In this implementation, YRDIF first determines the actual number of days between two dates. ; date=today(); Age_exact = floor((intck('month',b_date,Date)-(day(Date) < day(b_date))) / 12);Age. Merge two given maps, key-wise into a single map using a function. SAS calculates this value as the number of days that fall in 365-day years divided by 365 plus the number of days that fall in 366-day years divided by 366. Analytics. I'll be creating a second variable, date_last_visit, in which I'll need to calculate age at time of date_last. Missing if either date is missing. 9. Using intck will say there is 1 month interval between the two, so Month = 1; Temp is set to Date1 + Month, but to the same day, hence Temp = 09/03/2011. For instance, you can use YEARFRAC to identify the proportion of a whole year's benefits, or. The Quality of Life Form (QUL) was administered regularly to the patients enrolled in the National Interstitial Cystistis Data Base Study. Calculations That Use ACT/ACT Basis. 6 than 13. So, although 22JUN2020 and 20JUL2020 belong to different months, the number of completed months between these. Data & Analytics. (date () - col_C) as age_bucket. . Additionally, SRSF1 was identified as the binding protein of MIR155HG. To dev elop spa rk applications in Python, we will use PySpark. The Basics. Jonathan Duggins, NC State University. Lastly, we also touch on date constants, which are useful if you want. AS DOB, &todaysDate AS Todays. I think the yrdif function still gets me closer to the figure I need. DATEJUL( yyddd) returns the SAS date value given the Julian date in yyddd or yyyyddd format. One is AGE_ACTUAL, which is the exact age from DOB to January. ); run; In the above example, the variable x is a character variable as it is defined in quotes '12345'. -----The hash OUTPUT method will overwrite a SAS data set, but not append. This problem occurs because, from January 2 to January 30, 2019, SAS® software downloads and hot fixes might be incomplete. 0 + n366/366. com The YRDIF function was originally designed to calculate "age spans" for use in financial and government applications (and not for annotating birthday cards!), so some differences can be expected. " Since age is the difference in years between two dates (a birth date and some other date), the YRDIF function has been used to compute ages in this way: age = INT(YRDIF(birth-date, ending-date,'ACTUAL')); 'ACT/ACT' uses the actual number of days between dates in calculating the number of years. Topics include basic SAS concepts such. The newly created variable new_x is in numeric format. Using YRDIF in Financial Applications The Basics. When you run code that references a DBMS, a segmentation violation or an exception might occur. I am interested in looking an incidence rate of first stopping ARV in HIV populations. It magisch be better to use either aforementioned YRDIF era by any decimal. And it is reading only when there's two spaces between the date values in the cards and if there's only one space it reads the second value as missing. 3489 16034 34. First date of study was 1/1/2005,. txt from BSTA 445 at Concordia University. The INTCK function has three obligatory arguments and one options argument: interval: a character constant, variable, or expression (in lower or uppercase) that specifies your interval, e. The book's friendly, easy-to-read style gently introduces readers to the most commonly used features of the SAS language. , soLearn how to use SAS Enterprise Guide, a powerful graphical user interface for SAS programming and analysis. 0. A couple of the values are 82902 (which is August 29, 2002) and 111797 (which is November 17, 1997). In-Database Technology. Moving and Accessing SAS Files. user_id,max(named_struct('opr_time',d. This release contains updates for many of the third-party technologies that are used by the platform, including the Java runtime environment (JRE) and many of the third-party JAR files. basis. etc, to age 99. e. 25, this is an approximation, unnecessary as YRDIF or INTCK gets it exactly right, not an approximation). With the YRDIF function, you can also calculate a person’s age. For instance, you can use YEARFRAC to identify the proportion of a whole year's benefits, or. the output format is numeric best12. perhaps I have one variable for age coded by flooring the results of the YRDIF function with the AGE basis, available in SAS 9. CALERIE Phase 2 Data handling rules for RMR, TEE and AREE Residuals 4 The Mixed Procedure Model Information Data Set WORK. The variables. sas. There is an ever-so-subtle difference between using $ and not: with $, the variable is expanded before the expression is evaluated. total_cohort_ person_years_age_1 = XX. . Operating Environments. 25". Problem 9. ;It covers some of the most important modeling and prediction techniques, along with relevant applications. will . data _null_; sdate='16oct1998'd; edate='16feb2003'd;. ) I write this program but it does not work data ageyear; documentation. data temp; x = '12345'; new_x = input (x,5. If the date represented in the second argument is to be included in the interval an extra day should be added. ZIPCITYDISTANCE Function. In the following code, we are adding seven days to 02 January 2017. Here are some real-world examples of how the INTCK function is used in SAS. Using either the DATDIF() or YRDIF() functions with datetime values as the arguments to the function might cause aD) data directory; set faculty; run; B) data directory; set faculty staff; run; What must be true before two data sets can be merged in SAS using a by statement? A) The two data sets must be in the same library. leap day), YRDIF returns the correct age in years (age=4. YRDIF counts +1 for every 365 (or 360 or 366 days depending on the optional third argument you use, I don't know how the 30/360 work tho) SAS Base Programming (2022 Dec), Preparing for SAS Advanced Programming (Cancelled). If you are referencing tables in multiple DBs/Schemas then any not in the DB/Schema you include in the connection would need. Pre-built macro functions that are part of the macro processor. It approximates the SAS function yrdif with basis 'ACTUAL' or 'AGE'. Syntax Conventions for the SAS Language. But the difference is more than one year, so we will use the YEARFRAC function in the C2 cell to get the full difference of a year. First, we create a function colsInt and register it. ; run;The use of YRDIF function is detailed in the SAS online document. The YRDIF function can compute a person’s age. It's Friday spelled backwords! Adapted by the Disney channel, to give Friday a cool name!Get all 165 Rad Girlfriend Records releases available on Bandcamp and save 80%. To get today's date in SAS, you can either the today() or date() functions. INPUT converts characters to a number, PUT converts a number to characters. PROC SQL < option (s) >; ALTER TABLE table-name. comWhat's New in SAS 9. It should be dt_death - dt_birth if dt_death is present or otherwise it should be today's date- dt_death. If the value of argument is positive, the INT function has the same result as the FLOOR function. Select a different version from the version selector in the banner, or access the latest documentation. Cloud Analytic ServicesAssume that you input a character string 20211109 with a sas format like yymmdd8. SAS® 9. YRDIF function not working for some observations. The second argument is end_date, so. YRDIF - Given two SAS dates or datetimes, computes the difference between the dates in years. The appropriate format to use for SAS date or datetime valued ID variables depends on the sampling frequency or periodicity of the time series. If the value of basis is AGE, then YRDIF computes the age. Security is the primary focus of the Maintenance 8 update. MDY(10,35,15); D. However, for pediatric studies, different approaches could give quite bit. 2. net dictionary. Method 2: Round to Specific Decimal Places. Output and Graphics. Auto-call macro functions. DATA DIFFERENCE; infile cards dlm=',' dsd; INPUT DATE1. 2 Using the SAS data set Hosp, use PROC PRINT to list observations for Subject values of 5, 100, 150, and 200. 1. YRDIF Function. SAS® 9. SAS 9. Supporting Documents . SAS® 9. YYQ Function: Returns a SAS date value from year and quarter year values. ) returns the year from a SAS date value (. Table of Contents: The SQL Procedure. And it is reading only when there's two spaces between the date values in the cards and if there's only one space it reads the second value as missing. To show the total payment and the total interest, we use PROC REPORT to generate a summary table as Figure 2. I think you intended to apply the INT function to the entire computed value, so you need to move a paren: MAT_AGE = int( (new_DOB - new_MomDOB) /365. explode (col) Returns a new row for each element in the given array or map. YEARFRAC calculates the fraction of the year represented by the number of whole days between two dates (the start_date and the end_date). , so you INPUT with MMDDYY10 to get to a number, and then PUT to the format you like ( DATE9 ). Calculation of individual's age : The INTCK function is used to calculate the number of years between date of birth and today's date. Age is always dependent upon a given target date. Re: Calculate Age for Missing Values from DOB. 22. g. In summary, your job is to use the quality of life data to create the following. Though I've entered 30jun1983 it gets saved as 30/jun/2020. It also provides the Pyspark shell for real-time data analysis. Lesson 22: Date and Time Processing. Table 3. 04. start-date: a Date or DateTime. . I tried to do something like, disburse_time = loans_different_year ['disburse_time'],. Regular type indicates the name of a component that is described in SQL Procedure Component Dictionary. The first payment is optional and corresponds to a cost or payment that occurs at the beginning of the investment. sas. The input file: sales. udf (Phases. DATE() returns today’s date as a SAS date value. YRDIF Function.