Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
Articles by Nizamuddin Siddiqui
Page 58 of 196
How to create stacked bar chart using ggvis in R?
To create stacked bar chart using ggvis, we can follow the below steps −First of all, create a data frame.Create the stacked bar chart with layer_bars function of ggvis package.Create the data frameLet's create a data frame as shown below − Live DemoGroup
Read MoreHow to convert year, month, and day of the month into a complete date in R?
To convert year, month, and day of the month into a complete date, we can follow the below steps −Create a data frame with Year, Month and DayOfMonth as separate columns.Use mutate function of dplyr package to create complete date.Create the data frameLet's create a data frame as shown below − Live DemoYear
Read MoreHow to divide data frame rows by number of columns in R?
To divide data frame rows by number of columns in R, we can follow the below steps −First of all, create a data frame.Then, use apply function to divide the data frame rows by number of columns.Create the data frameLet's create a data frame as shown below − Live Demox
Read MoreHow to generate the outcome of three throws of a die in R?
When we roll a die three times, the sample space contains two hundred and sixteen outcomes that is 216. If we want to generate the outcome of three throws of a die then expand.grid function can be used with rep and list function.Generating the outcome of three throws of a dieLet's create a data frame as shown below − Live Demoexpand.grid(rep(list(1:6),2))On executing, the above script generates the below output(this output will vary on your system due to randomization) −OutputVar1 Var2 1 1 1 2 2 1 3 3 1 4 4 1 5 5 1 6 6 1 7 1 2 8 2 2 9 3 2 10 4 2 11 5 2 12 6 2 13 1 3 14 2 3 15 3 3 16 4 3 17 5 3 18 6 3 19 1 4 20 2 4 21 3 4 22 4 4 23 5 4 24 6 4 25 1 5 26 2 5 27 3 5 28 4 5 29 5 5 30 6 5 31 1 6 32 2 6 33 3 6 34 4 6 35 5 6 36 6 6
Read MoreHow to find the proportion of categories based on another categorical column in R's data.table object?
To find the proportion of categories based on another categorical column in R's data.table object, we can follow the below steps −First of all, create a data.table object.Finding the proportion based on categorical column.Create a data.table objectLoading data.table package and creating a data.table object with two categorical columns −library(data.table) Category1
Read MoreHow to divide the row values by row sum in data.table object in R?
To divide the row values by row sum in R’s data.table object, we can follow the below steps −First of all, create a data.table object.Then, use apply function to divide the data.table object row values by row sum.Create the data.table objectLet’s create a data.table object as shown below −library(data.table) x
Read MoreWhy mean is NaN even if na.rm is set to TRUE using dplyr in R?
If na.rm is set to TRUE using dplyr package then the output for statistical operations returns NaN. To avoid this, we need to exclude na.rm. Follow below steps to understand the difference between the tw −First of all, create a data frame.Summarise the data frame with na.rm set to TRUE if NA exists in the data frame.Summarise the data frame without setting na.rm to TRUE.Create the data frameLet's create a data frame as shown below − Live DemoGroup&li;-rep(c("First", "Second", "Third"), times=c(3, 10, 7)) Response&li;-rep(c(NA, 3, 4, 5, 7, 8), times=c(3, 2, 5, 2, 4, 4)) df&li;-data.frame(Group, Response) dfOn executing, the above ...
Read MoreHow to display categorical column name in facet grid in R?
To display categorical column name in facet grid, we can use the following steps −First of all, creating data frame.Loading ggplot2 package and creating a chart with facetsCreating the chart with facets and labeller function to display categorical column nameCreate the data frameLet's create a data frame as shown below − Live Demox
Read MoreHow to remove only first row from a data.table object in R?
To remove only first row from a data.table object we can follow the below steps −First of all, creating the data.table object.Subsetting the data frame with single square brackets by negation of 1Example1Create the data frameLet's create a data frame as shown below −library(data.table) x1
Read MoreHow to convert a variable into zero mean and unit variance in an R data frame?
Converting a variable into zero mean and unit variance means that we want to standardize the variable and it can be done with the help of scale function we can follow the below steps −First of all, creating data frame.Then using scale function to convert the variable into zero mean and unit variance.Create the data frameLet's create a data frame as shown below − Live Demox
Read More