Category Archives: SAS

SAS

Automatically analyzing and documenting SAS-code

March 28, 2018 Root 3 Comments

In SAS Enterprise Guide and SAS-DI you have the possibility to analyze the code for a SAS-program.

The picture below shows the Analyze Program option in SAS Enterprise Guide.

Analyzing the code should result in a conversion of the SAS-code to a SAS Enterprise Guide flow or SAS-DI flow. But none of these code analyzers are very good. Depending on the complexity of the SAS-code you put into the analyzer, they will leave you with a more or less successful conversion. And more times than not they will fail at doing the job.

But SAS comes with a procedure PROC SCAPROC that does a really good job at analyzing and documenting SAS-code.

Below is an example.

proc scaproc;
record '<PATH>' attr expandmacros;
run;
 
proc scaproc;
write;
run;

proc scaproc;

record '<PATH>' attr expandmacros;

run;

proc scaproc;

write;

run;

The links below gives you further descriptions of PROC SCAPROC and its options. There’s also a guide on how to do a graphical presentation of the result fra PROC SCAPROC.

Overview of the SCAPROC Procedure
http://support.sas.com/documentation/cdl/en/proc/61895/HTML/default/viewer.htm#a003199745.htm

Program for parsing the output from PROC SCAPROC to create a data set with inputs and outputs.
http://support.sas.com/kb/58/047.html

Innovative Performance Improvements Through Automated Flowcharts In SAS
http://support.sas.com/resources/papers/proceedings16/11580-2016.pdf

Automatically create diagrams showing the structure and performance of your SAS code
http://support.sas.com/resources/papers/proceedings17/1104-2017.pdf

SAS

Uniqueness in data

March 8, 2018 Root Leave a comment

The SAS-macro below will tell you if a variable in a dataset is unique.

/********************************************************************************
Author        : 
Creation date : ddmmmyyy
Description   : Gets info about uniqness in a SAS-dataset.
Example       : %uniq(sashelp.class, name, print)
*********************************************************************************
Input
-----
&datset   : The dataset to test.
&variable : The variable to test for uniqueness.
&print    : If the output/result should be shown in a PROC PRINT.
*********************************************************************************
Output
------
freq_result          : Dataset sorted with doublets as first rows.
freq_result_doublets : Data containing only the doublets.
********************************************************************************/
%macro uniq(dataset, variable, print);
	proc freq data=&dataset.;
		tables &variable / noprint out=freq_result;
	run;

	proc sort data=freq_result;
		by descending count;
	run;

	data freq_result_doublets;
		set freq_result;
		where count gt 1;
	run;

	proc sql noprint;
		select count(*) into :doublets
		from freq_result_doublets
		where count gt 1
		;
	quit;

	%put --------------------------------------------------------------------------------------------;
	%put NUMBER OF DOUBLETS IN [%upcase(&dataset.)] FOR VARIABLE [%upcase(&variable.)]: &doublets.;
	%put --------------------------------------------------------------------------------------------;

	%if &doublets. eq 0 %then
	%do;
		%put !!!! NO DOUBLETS !!!;
	%put --------------------------------------------------------------------------------------------;
	%end;

        %if &print. ne %then
        %do;
             proc print data=freq_result;
             run;
        %end;
%mend;

/********************************************************************************

Author :

Creation date : ddmmmyyy

Description : Gets info about uniqness in a SAS-dataset.

Example : %uniq(sashelp.class, name, print)

*********************************************************************************

Input

-----

&datset : The dataset to test.

&variable : The variable to test for uniqueness.

&print : If the output/result should be shown in a PROC PRINT.

*********************************************************************************

Output

------

freq_result : Dataset sorted with doublets as first rows.

freq_result_doublets : Data containing only the doublets.

********************************************************************************/

%macro uniq(dataset, variable, print);

proc freq data=&dataset.;

tables &variable / noprint out=freq_result;

run;

proc sort data=freq_result;

by descending count;

run;

data freq_result_doublets;

set freq_result;

where count gt 1;

run;

proc sql noprint;

select count(*) into :doublets

from freq_result_doublets

where count gt 1

;

quit;

%put --------------------------------------------------------------------------------------------;

%put NUMBER OF DOUBLETS IN [%upcase(&dataset.)] FOR VARIABLE [%upcase(&variable.)]: &doublets.;

%put --------------------------------------------------------------------------------------------;

%if &doublets. eq 0 %then

%do;

%put !!!! NO DOUBLETS !!!;

%put --------------------------------------------------------------------------------------------;

%end;

%if &print. ne %then

%do;

proc print data=freq_result;

run;

%end;

%mend;

SAS

Directory for SAS-macros

March 7, 2018 Root Leave a comment

The code below will give you the path of all the directories containing macros in the SASAUTOS in your SAS-session.

%put %sysfunc(getoption(sasautos));
filename _all_ list;

%put %sysfunc(getoption(sasautos));

filename _all_ list;

SAS

SAS crashes when you connect with RDP

March 17, 2015 Root Leave a comment

If your SAS-session crashes when you connect with RDP to a server the root-cause could be a check that SAS does for available printers.

To avoid these crashes it is possible to set a parameter in the config-file for SAS. The main config-file for SAS is called SASv9.cfg and in SAS 9.2 it’s usually located in C:\Program Files\SAS\SASFoundation\9.2\nls\en.

The parameter you have to add to the config-file is:
-noqueryports

SAS

Quote macrovariables e.g. for an IN SQL-statement

November 7, 2014 Root Leave a comment

The code below lets you qoute the contant of a macrovariables e.g. to be used in an IN SQL-statement.

%let Variables = age height weight;
%let InStatement = %Str(%’)%sysfunc(Tranwrd(&Variables.,%Str( ),%Str(%’, %’)))%Str(%’);

%let Variables = age height weight;

%let InStatement = %Str(%’)%sysfunc(Tranwrd(&Variables.,%Str( ),%Str(%’, %’)))%Str(%’);

The macrovariable InStatement will contain ‘age’,’height’,’weight’. And can then be used in an IN SQL-statement.

SAS

Getting programname for the SAS-program being executed

November 6, 2014 Root Leave a comment

The code below will get the programname of the program being used.

%macro GetSASProgramName;
	%scan(%sysget(SAS_EXECFILEPATH),-1,"\");
%mend;
%let SASProgramName = %GetSASProgramName;

%macro GetSASProgramName;

%scan(%sysget(SAS_EXECFILEPATH),-1,"\");

%mend;

%let SASProgramName = %GetSASProgramName;

This will only work on Windows.

SAS

Getting information about your SAS-installation

September 23, 2014 Root Leave a comment

Below is a couple of commands that can be used to get information about your SAS-installation.

proc setinit;
run;

1 2	proc setinit; run;

The Setinit-command will give you information about the SAS-products that your SAS-installation is licensed for.

proc product_status;
run;

1 2	proc product_status; run;

The Product_status-command will give you information about the SAS-products installed on your system.
Keep in mind that there could be a difference between what’s licensed on your system and what’s actually installed.
The commands above will only give you information about the products installed for base-SAS. If you want information about what other SAS-products is installed on you system, then you can get this SAS-program from SAS and run it on your system.

SAS

Make a folder with ISO date and time in SAS

July 17, 2014 Root Leave a comment

The code below makes a folder with an ISOdate.

%let ISOdt  = %sysfunc(datetime(), B8601DT.);

data _null_;
 rc = system("mkdir c:\test\&ISOdt.");
 put rc=;
run;

%let ISOdt = %sysfunc(datetime(), B8601DT.);

data _null_;

rc = system("mkdir c:\test\&ISOdt.");

put rc=;

run;

SAS

SAS Encode Password

May 8, 2014 Root 1 Comment

The code below lets you encode a password in SAS, based on the methods for encoding passwords available in SAS.
You can see a description of the methods for encoding below. Be aware that a password encoded with base64 (sas001) can be very easily discovered.

Encoding vs. encryption
PROC PWENCODE uses encoding to disguise passwords. With encoding, one character set is translated to another character set through some form of table lookup. Encryption, by contrast, involves the transformation of data from one form to another through the use of mathematical operations and, usually, a “key” value. Encryption is generally more difficult to break than encoding. PROC PWENCODE is intended to prevent casual, non-malicious viewing of passwords. You should not depend on PROC PWENCODE for all your data security needs; a determined and knowledgeable attacker can decode the encoded passwords.

Encoding is a process of converting one set of meaningful characters into another set. By converting into a different set the characters become unreadable and the meanings of the characters are disguised from the public.
Encryption is a method to transform data from plain text to cipher text through the use of a mathematical algorithmic scheme. Any plain text through encryption process becomes cipher text and is illegible to anyone without a special key.
Though both processes involve converting data from one format to another, encoding process is designed for disguising the data to be revealed casually. Encoding and decoding processes do not require a special key. On the other hand, encryption method is used to protect data from to be revealed to anyone other than the intended recipient. In order to read the encrypted text both the encryption key and the mathematical algorithm are required.
Encoding is intended to disguise data from to be revealed in public. For our purpose, it works well to prevent casual, non-malicious viewing of password in the SAS programs. Because of the special key and mathematical algorithm involved encryption is generally more difficult to break. It is designed for maintaining data confidentiality. Encoding and encryption are developed for different purposes. One should not replace another.

The code below saves a file to drive containing a %let statement with the encoded password.

%macro EncodePwd(SavePath, Method);

        filename clp clipbrd;

        proc pwencode in="&Password." out=clp method=&Method.;
        run;

        data _null_;
            infile clp length=len;
            length encodedPW $100;
            input ;
            encodedPW = substr(_infile_, 1, len); /* Remove linefeed */
            call symput('encodedPW', compress(encodedPW));
        run;
        filename clp clear;

        filename encoded "&SavePath.";
        data _NULL_;
                file encoded(pwd.sas);
                tmp='%let pw='||"&encodedPW"||';';
                put tmp;
        run;
        filename encoded clear;
%mend;
%EncodePwd(C:\, sas001);
%EncodePwd(D:\, sas002);

%macro EncodePwd(SavePath, Method);

filename clp clipbrd;

proc pwencode in="&Password." out=clp method=&Method.;

run;

data _null_;

infile clp length=len;

length encodedPW $100;

input ;

encodedPW = substr(_infile_, 1, len); /* Remove linefeed */

call symput('encodedPW', compress(encodedPW));

run;

filename clp clear;

filename encoded "&SavePath.";

data _NULL_;

file encoded(pwd.sas);

tmp='%let pw='||"&encodedPW"||';';

put tmp;

run;

filename encoded clear;

%mend;

%EncodePwd(C:\, sas001);

%EncodePwd(D:\, sas002);

SAS

Reading data from api.statbank.dk into SAS

March 24, 2014 Root Leave a comment

The code below lets you read data from api.statbank.dk into SAS. api.statbank.dk is an api provided by Statistics Denmark (Danmarks Statistik) for reading their public data.

The code below gets it’s data from the table FOLK1. You can get a list of avaliable tables from this url – http://api.statbank.dk/v1/tables?format=CSV. The code also sets some filters on the tables, some of the information used in this post comes from here.

filename dst
url
'http://api.statbank.dk/v1/data/Folk1/CSV?valuePresentation=Value&Tid=*&K%C3%B8n=*&Omr%C3%A5de=*&alder=*'
                        proxy='http://<your proxy:and port>/'
                        debug
                        lrecl=8192
                        puser="<your userid to proxy>"
                        ppass="<your password to proxy>";

data test;
        infile dst dlm=';' encoding="utf-8";
        format Quarter Sex Municipality Age $50.;
        input Quarter $ Sex $ Municipality $ Age $ Count;
run;

filename dst

url

'http://api.statbank.dk/v1/data/Folk1/CSV?valuePresentation=Value&Tid=*&K%C3%B8n=*&Omr%C3%A5de=*&alder=*'

proxy='http://<your proxy:and port>/'

debug

lrecl=8192

puser="<your userid to proxy>"

ppass="<your password to proxy>";

data test;

infile dst dlm=';' encoding="utf-8";

format Quarter Sex Municipality Age $50.;

input Quarter $ Sex $ Municipality $ Age $ Count;

run;

Ryslander.com

Category Archives: SAS

Automatically analyzing and documenting SAS-code

Uniqueness in data

Directory for SAS-macros

SAS crashes when you connect with RDP

Quote macrovariables e.g. for an IN SQL-statement

Getting programname for the SAS-program being executed

Getting information about your SAS-installation

Make a folder with ISO date and time in SAS

SAS Encode Password

Reading data from api.statbank.dk into SAS

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