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Articles by Nizamuddin Siddiqui
Page 118 of 196
How to replace NAs with 0 in an R list that contains data.table objects?
To replace NAs with 0 in an R list that contains data.table objects, we can follow the below steps −First of all, create a list of data.table objects that contain some NAs.Then, use lapply function and is.na function to replace NAs with 0 in the list.ExampleCreate the listLet’s create a list as shown below −library(data.table) DT1
Read MoreHow to remove hash sign at last position from every value in R data frame column?
To remove hash at last position from every value in R data frame column, we can follow the below steps −First of all, create a data frame with a column having hash at last position in every value.Then, use gsub function to remove hash at last position from every value in the column.ExampleCreate the data frameLet’s create a data frame as shown below −x
Read MoreHow to find the percentage of each category in an R data frame column?
To find the percentage of each category in an R data frame column, we can follow the below steps −First of all, create a data frame.Then, use summarise function of dplyr package after grouping along with n and nrow.ExampleCreate the data frameLet’s create a data frame as shown below −Group
Read MoreHow to find the number of columns where all row values are equal in R data frame?
To find the number of columns where all row values are equal in R data frame, we can follow the below steps −First of all, create a data frame.Then, use sum function along with length and apply function to find the number of columns where all row values are equal.Example 1Create the data frameLet’s create a data frame as shown below −x
Read MoreHow to create histogram with varying binwidth using ggplot2 in R?
To create histogram with varying binwidth using ggplot2 in R, we can follow the below steps −First of all, create a data frame.Then, use geom_histogram function with breaks argument having varying differences.ExampleCreate the data frameLet’s create a data frame as shown below −x
Read MoreHow to delete repeated rows in xts object in R?
To delete repeated rows in xts object in R, we can follow the below steps −First of all, create an xts object.Then, use duplicated and index function to delete repeated rows.ExampleCreate the xts objectLet’s create an xts object as shown below −library(xts) T
Read MoreHow to multiply single row matrix and a square matrix in R?
To multiply single row matrix and a square matrix in R, we can follow the below steps −First of all, create the matrices.Then, use %*% to multiply those matrices.ExampleCreate the first matrixLet’s create a matrix as shown below −M1
Read MoreHow to display square root sign in base R plot?
To display square root sign in base R plot, we can follow the below steps −First of all, create a plot having square root values to display default visualisation.Then, create the plot with expression function to display square root sign in the plot.ExampleCreate plot in base RUsing plot function to create a plot in base R with square root values as shown below −x
Read MoreHow to repeat a whole data frame in R?
To repeat a whole data frame in R, we can follow the below steps −First of all, create a data frame.Then, use rep function to repeat the data frame.ExampleCreate the data frameLet’s create a data frame as shown below −x
Read MoreHow to remove rows that contain NAs in R matrix?
To remove rows that contain NAs in R matrix, we can follow the below steps −First of all, create a matrix.Then, use na.omit function to remove rows that contains NAs.ExampleCreate the matrixLet’s create a matrix as shown below −M
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