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Articles by Nizamuddin Siddiqui
Page 30 of 196
How to subset an R data frame based on numerical and categorical column?
Subsetting is one of the commonly used technique which serves many different purposes depending on the objective of analysis. To subset a data frame by excluding a column with the help of dplyr package, we can follow the below steps −Creating a data frame.Subsetting the data frame based on numerical as well as categorical column at the same time with the help of filter function of dplyr package.Create the data frameLet's create a data frame as shown below −Level
Read MoreHow to create an ordinal variable in R?
An ordinal variable is a type of categorical variable which has natural ordering. For example, an ordinal variable could be level of salary something defined with Low, Medium, and High categories here we have three categories but there exists a natural order in these categories as low salary is always less than the medium, medium is always less than high. To create an ordinal variable in R, we can use the order argument along with factor function while creating the variable. Follow the below steps to create an ordinal variable in R −Create a categorical column with factor function where ...
Read MoreHow to display axes ticks and labels inside the plot using ggplot2 in R?
To display axes ticks and labels inside the plot using ggplot2 in R, we can follow the below steps −First of all, create a data frame.Then, create a plot using ggplot2.After that create the same plot with theme function to change the position of axes ticks and labels.Create the data frameLet's create a data frame as shown below −x
Read MoreHow to subset rows based on criterion of multiple numerical columns in R data frame?
If we want to create a subset of a data frame based on multiple numerical columns then we can follow the below steps −Creating a data frame.Subsetting the data frame with the help of filter function of dplyr package.Create the data frameLet's create a data frame as shown below −x1
Read MoreHow to create a graph in base R with multiple shades of a particular color?
To create a graph in base R with multiple shades of a particular color, we can follow the below steps −First of all, create color shades using colorRampPalette then plot a graph.Use the color shades to create the graph.Example 1Create the color shadesUsing colorRampPalette function to create the color shades between red and darkred color then creating the plot −Color
Read MoreHow to create a sample or samples using probability distribution in R?
A probability distribution is the type of distribution that gives a specific probability to each value in the data set. For example, if we have a variable say X that contains three values say 1, 2, and 3 and each of them occurs with the probability defined as 0.25, 0.50, and 0.25 respectively then the function that gives the probability of occurrence of each value in X is called the probability distribution. In R, we can create the sample or samples using probability distribution if we have a predefined probabilities for each value or by using known distributions such as ...
Read MoreHow to create boxplot using ggplot2 without box border in R?
We know that the middle portion of a boxplot is a box which is covered with black border but we can remove that border from the plot by defining the aesthetics of the boxplot with color argument. We can follow the below steps to create such type of boxplot −Creating a data frame.Then create a default boxplot.Loading ggplot2 package and creating the same boxplot without box border.Create the data frameLet's create a data frame as shown below −x
Read MoreHow to create a bar plot in R filled with color palette in RColorBrewer package?
To create a bar plot in R filled with color palette in RColorBrewer package, we can follow the below steps −First of all, create a vector.Create the bar plot with color palette in RColorBrewer package.Example 1Let's create a vector as shown below −x
Read MoreHow to create facetted histograms using ggplot2 in R?
The facetted histograms are the separated histograms created for different categories in a single plot window. We can follow the below steps to create such type of histograms using ggplot2 −First of all, create the data frame.Load the ggplot2 package and create facetted histogram with the help of facet_grid function of ggplot2 package.Create the data frameLet's create a data frame as shown below −Group
Read MoreHow to remove interaction from regression model in stargazer in R?
To remove interaction from regression model in stargazer in R, we can follow the below steps −First of all, create a data frame.Then, create a regression model using stargazer.After that, create the regression model with stargazer without interaction terms.Create the data frameLet's create a data frame as shown below −x1
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