Minimize the number of sorts It is more efficient to use two by variables in one sort rather than doing two separate sorts to get the same effect. Table 11. The %IF statement gets evaluated when the SAS Macro program is executed, but the SAS Macro facility is only generating code that will be executed. Computer resources CPU time: the time the computer’s central processing unit spends doing calculations and performing other operations. http://applecountry.net/by-zero/division-by-zero-php-error.php
Also be aware that errors early in the process can "snowball" and cause major problems later in the program. SAS will report the occurrence in the log but there is no indication of the cause in the data itself. NOTE: DATA statement used: real time 0.00 seconds cpu time 0.00 seconds 75 76 proc reg data=hartman; 77 model y = time cond; 78 run; NOTE: 9 observations read. Table 16. http://www.amadeus.co.uk/sas-training/tips/3/1/46/manage-division-by-zero.php
Look at raw data files carefully 4 3234 POLI 041 203 A 2 0020 ECON 121 B 1 0255 MATH 002 1 D input year 1 instr 3-6 dept $ 8-11 To make your code easier to understand, develop a set of coding conventions to follow consistently. So generally, Macro %IF statements are NOT used to test data step variables. SAS has two forms of comments: and The advantage of the former is that it can mask semi-colons so it can comment out SAS code: Plan your variable and data set
Using a null data set in a data step used for printing Needs improvement More efficient data test; set congelec; file print; put @5 candname @30 votes; run; data _null_; set Skip to main Content Your Shopping Basket Education Portal Contact Amadeus Careers Blog Join us Home About Us SAS Consultancy Managed Services SAS Training Software Home > SAS Training > Tips Efficiency We know that efficiency is generally a good thing, but what does "efficiency" mean in talking about SAS programming? Sometimes Stat/Transfer may make a SAS file that SAS has trouble reading in a statistical procedure, but there is a workaround.
Storage space: the amount of disk space used by your SAS program. You can then sort these subsets by additional variables and concatenate the subsets to get a data set sorted by the variable you used to subset the data. If you use the special data set name _null_ in the data statement, no data set will be created. https://communities.sas.com/t5/Base-SAS-Programming/Divide-by-0-Error-in-Macro/td-p/143296 Table 9.
Each place is given by: (Number of times) at (Line):(Column). 1 at 18:26 A report listing the data will simply show that the values are missing. Of course, your program could be more complicated, but I wonder why you are mixing macro programming statements with DATA step variables. If you use the wrong approach, you will end up with garbled data and error messages in your log. If code is written clearly, it is easier to debug, modify, and maintain.
Repeat the last sentence three times.You most probably want this in your %do loop:if total ne 0then perc_&var&var_num = &var&var_num / total;else perc_&var&var_num = 0;This piece of code is then repeatedly Often comparisons and other statements can be phrased in ways to make the logic of the program more obvious. Division By Zero Detected In Sas The exact format of the output and the statistics reported vary depending on the host system. Sas Divide Function In the second case, SAS reads from disk only the three variables you intend to keep.
data create_data; input numerator denominator; cards; 150 1 150 0 150 . Get More Info With multiple if-then clauses, SAS stops reading the rest of the statement as soon as one of the clauses is found false. NOTE: 1 observations have missing values. Use other techniques to emulate large sorts Sometimes a data set is too big to successfully execute proc sort.
The %IF statement gets evaluated when the SAS Macro program is executed, but the SAS Macro facility is only generating code that will be executed. You don’t need to read the contents into a temporary data set first. NOTE: Division by zero detected at line 18 column 26. useful reference SAS offers several ways to measure resource use in your programs.
Using a series of comparisons Needs improvement More efficient data new; set old; if (x > 5) and (y < 6) and (z ge 20) then var = 'no'; run; data Mijn accountZoekenMapsYouTubePlayNieuwsGmailDriveAgendaGoogle+VertalenFoto'sMeerShoppingDocumentenBoekenBloggerContactpersonenHangoutsNog meer van GoogleInloggenVerborgen veldenZoeken naar groepen of berichten The University of North Carolina at Chapel Hill Calendar Libraries Maps Departments ConnectCarolina Search » Help & Support University of North I/O time: the time spent reading data from disk into memory for work (input) or moving results out of memory to disk storage or to a terminal (output).
NOTE: The SAS System stopped processing this step because of errors. 20 proc reg data="c:\mydata\hartman"; 21 model y = time|cond; 22 run; 23 What went wrong? For example, data hartman; set "c:\mydata\hartman"; run; proc reg data=hartman; model y = time cond; run; and then the log file shows that this worked, 72 data hartman; 73 set "c:\mydata\hartman"; Grouping constants together Needs improvement More efficient total = .242 + x + 5 + y; total = x + y + .242 + 5; Use a series of if statements Anytime total equates to zero, you get a warning.The macro processor is invoked BEFORE any data step runs, and does its work without any knowledge about what happens during data step
title 'Using the data for a listing'; proc print data=divide_function; run; Proc Print produces the following listing, note the 'I' in the output Using the data for a listing calc_ func_ Table 18. Look at the following code: Table 13. this page Table 6.
For debugging, you can use the put statement to write suspicious values to the SAS log. Labels can give information about units of measurement or coded values, and are easier to use than formats. Memory: the amount of the computer’s memory required by your program. Using the command to reduce the number of data steps Needs improvement More efficient data new; set old; if ( (age ge 18) and age le 65); run; proc reg data=new;
Avoid confounding factors in the code, the working environment, and the SAS session. In addition, use comments within your program.