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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to subset row values based on columns name in R data frame?
To subset row values based on columns name in R data frame, we can follow the below steps −First of all, create a data frame.Then, create a sample of column names of size equal to number of rows in the data frame and row names in the same manner with seq_len function, after that use cbind function to subset the rows based on columns name.Create the data frameLet's create a data frame as shown below −Gender_1
Read MoreHow to subset rows of data frame without NA using dplyr in R?
To subset rows of data frame without NA using dplyr in R, we can follow the below steps −First of all, create a data frame.Then, use filter function of dplyr package to subset the rows with !is.na.Create the data frameLet's create a data frame as shown below −x
Read MoreHow to divide data frame rows in R by row minimum?
To divide the data frame row values by row minimum in R, we can follow the below steps −First of all, create a data frame.Then, use apply function to divide the data frame row values by row minimum.Create the data frameLet's create a data frame as shown below −x
Read MoreHow to subset rows of an R data frame if any columns have values greater than a certain value?
To subset rows of an R data frame if any columns have values greater than a certain value, we can follow the below steps −First of all, create a data frame.Then, use filter_all function of dplyr package with any_vars function to subset the rows of the data frame for any columns having values greater than a certain value.Create the data frameLet's create a data frame as shown below −x1
Read MoreHow to create a scatterplot with two legends using ggplot2 in R?
If we want to create a scatterplot with two legends then we must be having two categorical or factor columns. This can be done by using the below steps −Creating a data frame with two numerical and two categorical columnsCreating the scatterplot with shape and color argument of geom_point function of ggplot2 packageCreate the data frameLet's create a data frame as shown below −x
Read MoreHow 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
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