Home » Other » Marketplace » www.studysas.blogspot.com (Learn SAS)
www.studysas.blogspot.com [message #354684] Mon, 20 October 2008 18:30 Go to next message
Messages: 4
Registered: October 2008
Junior Member
SAS Interview Q&A and Trial resumes:
SAS Interview Questions and Answers:Part1 (Behavioral Type Interview Questions)
SAS Interview Questions: General(Part-2)

SAS interview questions:Macros


SAS interview Q & A: PROC SQl and SAS GRAPH and ODS

SAS Interview Questions:Base SAS
SAS Interview Questions & Answers:Clinical trials
SAS Interview Questions and Answers: CDISC,SDTM,ADAM etc

What you should know about the ISS/ISE (ISR)

SAS Resumes

SAS in clinical trials:
CDISC http://studysas.blogspot.com/2008/08/cdisc.html
List of the Domains (datasets) and the variables in it: (CDISC perspective)

Contents of Clinical Study Report

Contents of Protocol of Clinical Trial


Contents of Statistical Analysis Plan (SAP)
TLF samples http://studysas.blogspot.com/2008/08/tlf-samples.html
Different phases I-IV of a clinical trial
SAS Tutorials (Video): Free
SAS free study tutorials
Online SAS study materials:
Basic Statistical Tests Using SAS

Learn SAS in 6 weeks:
POWER POINT Presentations on SAS by WIPRO/COGNIZANT,GE Capitol & SAS http://studysas.blogspot.com/2008/09/power-point-presentations-on-sas-by.html

SAS ebooks: free download

SAS Tips and Techniques:
SAS Tips and Trics
Ten Great Reasons to Learn SQL Procedure
SAS UNIX Commands:

CLASS Statement
Proc SQL VS Datastep: SAS syntax
SAS Online Documentation:

Re: www.studysas.blogspot.com [message #398815 is a reply to message #354684] Fri, 17 April 2009 13:42 Go to previous message
Messages: 4
Registered: October 2008
Junior Member
Learn SAS Programming

How to determine the executing program name and path programatically:

Oftentimes, I was asked to keep the name and path of the executing program in the FOOTNOTE of the generated table or listings.I have always created a macro variable using the %let statement and, then I called the Macro variable in the footnote statement to get the name of the program. Eventhough it is simple.. it may not be suitable when we write application which need to self document...

Read more at: http://studysas.blogspot.com/2009/04/how-to-determine-executing-program-name.html
How to check if a variable exist or not:
In SAS sometimes, we need to check whether the variable is exist in the dataset or not, we usually run the proc contents program and physically check if the variable exist in the dataset or not.If we want to check it programmatically, then use the following code....

Read more at: http://studysas.blogspot.com/2009/04/how-to-check-if-variable-exists-in-sas.html

How to check if the File is exist or not in SAS:
Guys... Let me try explaining how to check if the file exist in the library or directory using SAS.Here I am writing a macro to check if the file exist in the directory or not.Here is the way to

check it... http://studysas.blogspot.com/2009/04/how-to-check-if-file-is-exist-or-not-in.html

SAS programming errors we make..... can be deadly sometimes
The errors I will list here will be very few in number. They are errors that you will likely make at some time if you do not remain alert. These errors could have serious consequences so that is why I have described them as "deadly errors".

Read more at: http://studysas.blogspot.com/2009/03/sas-programming-errors-we-made-can-be.html

Somany times people from my orkut community asked me what is the real difference between the Proc sort Dodup and the Proc Sort nodupkey. I always wanted to answer the question in a better way.... and folkes... here is the answer ..... A common interview question for SAS jobs is "What is the difference between proc sort nodup and proc sort nodupkey?". The answer the interviewer is expecting is usually "proc sort nodup gets rid of duplicate records with the same sort key but proc sort nodupkey gets rid of other records with the same sort key". However, this is not correct.
Read more at: http://studysas.blogspot.com/2009/03/proc-sort-nodup-vs-nodupkey.html

PROC TRANSPOSE: How to Convert Variables(columns) into Observations(ROWS) and Observations(ROWS) into Variables(Columns)

During my early days as a SAS programmer, I get confused very easily with PROC TRANSPOSE. I mean, I get confused with what are the variables that I need to include in BY statement and ID statement as well as in VAR statement.

Read more at...:http://studysas.blogspot.com/2009/03/proc-transpose-how-to-convert.html

Displaying the Graphs (Bar charts) using PROC GCHART in SAS
Displaying the Graphs (Bar charts) using PROC GCHART in SAS :Just a day ago, I have received a question on Graphs in my orkut community, which prompted me to create following examples.Below are 5 different types of Graphs were produced (including 3d graphs) using Proc Gchart.

Read more at: http://studysas.blogspot.com/2009/03/displaying-graphs-bar-charts-using-proc.html

Change all missing values of all variables into zeros/putting zeros in place of missing values for variables

I always wondered how do I convert missing values for all the variables into zeros and In this example the I have used array to do the same. The variable list includes ID and Score1 to score6.Using simple array method we can change all the missing value for the variables score1 to score6 to 0.

Read more at:http://studysas.blogspot.com/2009/03/change-all-missing-values-of-all.html
How to Save LOG file in the required location:

Here is the simple code which allows us to save the log file in the required location. Use Proc printto procedure to save or print the log file. filename dsn 'C:\Documents and Settings\zzzzzzzzzzzz\Desktop\LOGfile.lst'

Read more at:http://studysas.blogspot.com/2009/03/how-to-save-log-file-or-what-is-proc.html

Calculating group totals and the counts within each group
Sample 25217: Calculating group totals and the counts within each group This example uses the SUM() function to sum the AMOUNT column, creating a new column named GRPTOTAL with a COMMA10. format. The COUNT() function counts the number of occurrences of STATE within each group. The GROUP BY clause collapses multiple rows for each group into one row per group, containing STATE, GRPTOTAL and the COUNT.

Read more at: http://studysas.blogspot.com/2009/03/calculating-group-totals-and-counts.html

How to customize page numbers in RTF output

In SAS 9.1, are there easier ways to customize page numbers in RTF output?
Yes, beginning with SAS 9.1, page numbers can be customized in the RTF destination by using an escape character and the {thispage} function, {lastpage} function, {pageof} function, or all three:

Read more at: http://studysas.blogspot.com/2009/03/how-to-customize-page-numbers-in-rtf.html

How to calculate number of years and number of days between 2 dates;
How to calculate number of years and number of days between 2 dates;Exploring the yrdif and datdif functions in SAS as well as INTCK function:There are several ways to calculate the number of years between two dates and out of all the methods, YRDIF function results the most accurate value.

Read more at: http://studysas.blogspot.com/2009/03/how-to-calculate-number-of-years-and.html


How to create a comma separated file (.csv) of a SAS dataset?
IN SAS programming, we often require outputting the dataset in different formats like EXCEL and CSV etc and here are the five different ways to export the SAS dataset into .csv file.

Read more at: http://studysas.blogspot.com/2009/02/how-to-create-comma-separated-file-csv.html


How to Import Excel files into SAS

Microsoft Excel spreadsheets can be read from SAS in several ways. Two of these will be demonstrated here. First, PROC IMPORT allows direct access to Excel files through SAS/Access to PC File Formats or access to Comma-Separated (CSV) files through Base SAS. The second method uses the Excel LIBNAME engine.

Read more at: http://studysas.blogspot.com/2009/02/how-to-import-excel-files-into-sas.html

How to store a number more than 8 digits for a numeric variables
Q&A: numeric variables length more than 8? We all know that the default length of the numeric variables in SAS is 8 and if suppose I want to store a number lets say (12345678910, which has a length 11 to numeric variable) to variable total, what should I do?

Read more at: http://studysas.blogspot.com/2009/02/how-to-store-number-more-than-8-digits.html

VALIDVARNAME= V7 UPCASE ANYVALIDVARNAME= option is generally used in SAS whenever we want to control the SAS variable names in the dataset.

Read more at: http://studysas.blogspot.com/2009/02/options-validvarnameupcase.html

How to merge data sets with a common variable?

Here is the simple way of merging the data sets with a common variable if the datasets has the same prefix name.For example: col1-col10, dsn1-dsn 7 , or data1 to data10 with common variable of ID.Considering we have 10 datsets and all of them having the same prefix data;

Read more at: http://studysas.blogspot.com/2009/02/merging-data-sets-with-common-variable.html

Merging the data sets with a common variable if the datasets has the same prefix name?

For example: col1-col10 dsn1-dsn 7 data1 to data6 with common variable of Usubjid.here is the example, I have 7 datasets i need to merge and each of them having the common variable(usubjid) to merge, and all the datasets having the same prefix dsn(dsn1 to dsn7).

Read more at: http://studysas.blogspot.com/2009/02/merging-data-sets-using-macro-code.html

when to use &,&&,and &&&,how do we distinguish(Multiple Ampersands) and Diff. Between single dot and double dots in macros
Here are the 2 important questions always comes up in our minds,(& vs && vs &&& and single dot and double dots) when we are dealing with macros for the first time and here are the answers for them.I did find a very good regarding the above topics in the one of the SAS forums and IAN WHITLOCK explained it very clear.

Read more at: http://studysas.blogspot.com/2009/02/3when-to-use-do-we-distinguishmultiple.html

How can I count number of observations per subject in a data set?

We always have this question in mind, while we do the SAS programming and here is the simple answer for that, we just need to use SUM statement and the FIRST.variable in the SET statement and then the RETAIN statement to calculate the observations count per subject.

Read more at: http://studysas.blogspot.com/2009/02/how-can-i-count-number-of-observations.html

How to remove the duplicate observations in the dataset using PROC SQL, DATASTEP/PROC SQL/or PROC SORT etc?

Before using a particular step to remove the duplicate observations, we should understand that the duplicate observations are pertaining to the key variables like usubjid, treatment, patientno. etc, which are unique or exact duplicates( 2 or more observations has the duplicates with respect to all the variables in the dataset).If the observations are exact duplicates with respect to all the variables in the dataset, we can remove the exact duplicates by:

Read more at: http://studysas.blogspot.com/2009/02/how-to-remove-duplicate-observations.html

How to scan more than 20 records to determine variable attributes in EFI:

In Versions 7 and 8 of the SAS System, by default the Import Wizard, PROC IMPORT and the External File Interface (EFI) scan 20 records to determine variable attributes when reading delimited text files.Changing the default setting can only be done for EFI in Version 7, Release 8 and Release 8.1. Beginning in Release 8.2 changing the default setting is applicable to the Import Wizard, PROC IMPORT and EFI.

Read more at: http://studysas.blogspot.com/2009/02/how-to-scan-more-than-20-records-to.html
SAS Sample Programs:
SAS sample code programs:
Macro for sorting the variables:
How to convert character date values into numeric date values using DATASTEP/PROC SQL and ARRAYS:
How to detect missing values using Arrays: First. & Last. Variables:
How to determine the last observation in the dataset:
How to determine whether a numeric or character value exists within a group of variables:
Lag Function: How to obtain information from the previous observation:
How to create a new dataset from multiple datasets based on the sorted order:
Dynamically generate SET statement to combine multiple datasets:
How to determine which dataset contributed an observation:
How to determine if a variable exists in a dataset or not:
How to Read Delimited Text Files into SAS:
How to keep only even number observations in the dataset:
How to verify the existence of an external file:
Accurately calculating age in one line code:
How to use INDEX/INDEXC functions:
Finding the number of observations in the dataset:
How to capitalize first letter of the every word:/ PROPCASE FUNCTION:
How to use the SCAN function:
Concatenation functions in SAS 9.0:
SOUNDEX Function:
IFC and IFN functions:new IF functions & IF-THEN-ELSE vs SELECT:
How to remove the duplicate observations from the dataset using PROC SQL, DATASTEP/PROC SQL/or PROC SORT approaches ?
How can I count number of observations per subject in a data set?
How to save the log file or what is PROC PRINTTO procedure
How to calculate number of years and number of days between 2 dates;
How to customize page numbers in RTF output How to create a comma separated file (.csv) of a SAS dataset?
Change all missing values of all variables into zeros/putting zeros in place of missing values for variables
Base SAS Certification Summary---Functions:
SAS Functions can be used to convert data and to manipulate the values of character variables. Functions are written by specifying the function name, then it's arguments in parentheses. Arguments can include variables, constants, or expressions. Although arguments are typically separated by commas, they can also be specified as variable lists or arrays.
Read more at: http://studysas.blogspot.com/2009/01/base-sas-certification-summary.html
SAS Certification Assignments
[hide]1 Session 1
1.1 exercise 1
1.2 exercise 2
1.3 exercise 3
1.4 exercise 4
1.5 exercise 5
1.6 exercise 6
2 Session 22.1 exercise 1
Read more at: http://studysas.blogspot.com/2008/11/sas-certification-assignments.html
Read more at: http://studysas.blogspot.com/2008/12/how-to-create-transport-file.html
How to Debug the SAS code:

Question:I have a huge SAS program that isn't working. The results I get are not right but there are no errors or warnings in the SAS log. How can I figure out where I went wrong?
Read more at: http://studysas.blogspot.com/2008/11/how-to-debug-sas-code.html
Previous Topic: Article: Archival and eDiscovery Address Different Challenges
Next Topic: Better integration solution of Web reporting tool
Goto Forum:

Current Time: Sun Feb 25 15:19:36 CST 2024