Introduction R language can also be used for commercial applications. In this article, I will describe how R language can be used for a commercial application like Payroll. In this exercise let us assume that in a typical Indian Company, every employee gets two types of allowances called Dearness Allowance(... [Read more...]

Introduction There are many packages available in R like data.table, tables, psych etc. to provide descriptive statistics like mean, standard deviation etc.  group-wise(factor-wise) for number variables.  In this article, an attempt is made to generate similar type of tabulated results utilizing  the  functions available in the base package ... [Read more...]

These plug-ins enhance statistical graphical user interface by extending new menus to statistical package provided by Rcmdr. While the original GUI was created for a basic statistics calculations, enabling of extensions (or plug-ins) has greatly enhanced the possible use and scope of this software. Installing these plug-ins is quite easy. ... [Read more...]

When the relation between two variables x and y is not linear and if there exists a curvilinear relationship (which can be observed by means of a scatter plot between x and y), then one can perform curve fitting or polynomial regression between these two variables. To know the details ... [Read more...]

Sometimes data may not be available in the csv file in the required format. Consider the following csv file, whose details are as follows – Four different treatments were given to four different groups of patients. Random samples of size 7 were selected from each group and blood levels of Hb percentage ... [Read more...]

Many times, while doing Statistical analysis, we have to evaluate the descriptive statistics like mean, standard deviation and so on for a number of variables, group-wise. Most of the Statistical packages like SAS, SPSS and so on provide these features. In R, the data.table package is very useful for ... [Read more...]