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Two Sample Ttest with R
In this tutorial, we will cover how to run two sample t-test with R.Two Sample Ttest with RIntroduction : Significance TestingYou have a sample data and you are asked to assess the credibility of a...
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Complete Guide to PROC UNIVARIATE
This tutorial explains how to explore data with PROC UNIVARIATE. It is one of the most powerful SAS procedure for running descriptive statistics as well as checking important assumptions of various...
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4 ways to calculate LAG and LEAD in SAS
This tutorial demonstrates multiple ways to calculate lag and lead in SAS. In time series data, it is generally required to calculate lag and lead of one or more measured variables. Time series or...
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dplyr Tutorial
It's a complete tutorial on data analysis or manipulation with R. This tutorial covers one of the most powerful R package for data wrangling i.e. dplyr. This package was written by the most popular R...
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SAS Statistical Business Analyst Certification Questions and Answers
This article covers some of the SAS Certified Statistical Business Analyst certification questions with detailed answers. This certification covers some of the most widely used statistical techniques...
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Observation and Performance Window
The first step of building a predictive model is to define a target variable. For that we need to define the observation and performance window.Observation WindowIt is the period from where independent...
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SAS : Variable Name having Spaces or Special Characters
This article may be an eye-opener for you if you think a variable name cannot contain blanks or special characters except for the underscore in SAS. In this article, we would learn how we can read a...
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R Interview Questions and Answers
R is one of the most popular programming language for performing statistical analysis and predictive modeling. Many recent surveys and studies claimed "R" holds a good percentage of market share in...
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Run R from SAS
This tutorial explains how to call or run R code from SAS environment. Both SAS and R are leaders in statistical analysis tools for analytics industry. Both the tools have its own advantages and...
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SAS : Advanced String Manipulation
This post covers how to deal some of the advanced string operations with SAS. In SAS, there are various functions available for handling character strings but sometimes they are not enough to...
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Identify Terrorists with Predictive Modeling
This article reveals 'Till what extent Predictive Modeling can be used'. Predictive Modeling is a process which is used to build a model with the help of historical data to predict future behavior. In...
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SAS : Find Variable with the Max or Min in a row
This tutorial demonstrates how to find a variable with the maximum or minimum value for each row (observation) in SAS. It's pretty straightforward to calculate max or min value but a little problematic...
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SAS SQL : Use Distinct in CASE WHEN
This tutorial explains how to ignore duplicates while specifying conditions / criteria in SQL queries. You must have used DISTINCT keyword to remove duplicates. It is frequently used with COUNT...
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SAS : Second Non-Missing Value
This tutorial demonstrates how to get second or second last non-missing value across rows. In SAS, there is a function called COALESCE to extract first non-missing value in a row. So it is an easy job...
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Create Charts with SAS
This tutorial covers various techniques to modify and create charts or graphs with SAS. SAS has never been the first choice of analysts for creating graphs/charts as it requires time and skill to code...
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Data.Table Tutorial (with 50 Examples)
This tutorial describes how to manipulate data with data.table R package. It is considered as the fastest R package for data wrangling. Analysts generally call R programming not compatible with big...
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Speed up SAS Code with Index
This tutorial demonstrates how to speed up SAS code with Indexes.SAS IndexWhat is Index?Indexes are not something technical or related to SAS programming. It is something we use everyday to make our...
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Excel : Goal Seek
This tutorial explains how to use Goal Seek in Excel. It includes explanation of this feature with several practical examples.What is Goal Seek?Goal Seek is an inbuilt excel utility that solves an...
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What SAS Stands For
It is often asked in interviews "What does SAS stand for?". I believe it's one of the most stupid question to assess someone's ability to program in SAS. But interviewers ask to see if a candidate is...
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SAS : Length of Numeric Variables
This tutorial describes how SAS treats length of numeric variables in data sets. It is often asked in interviews if default length of numeric variable is 8, how would you store a numeric variable...
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