Programming Articles - Page 1137 of 3363

To find the common elements in multiple vectors, we can follow the below steps −First of all, create a number of vectors.Use intersect function to find the common elements in all the vectors.Create the vectorsLet’s create a number of vectors as shown below − Live Demox

To add a column to data.table object, we can follow the below steps −First of all, create a data.table object.Add a column to the object using := functionCreate the data.table objectLet’s create a data.table object as shown below −library(data.table) x

To check if a column is categorical in R data frame, we can follow the below steps −First of all, create a data frame.Use class function to check the class of the column.Create the data frameLet's create a data frame as shown below − Live Demox

To set the nuber of digits to be printed for summary command without using options(digits), we can use digits argument while printing the summary. −Example 1Using mtcars data and finding the summary statistics with number of digits set to 2 − Live Demosummary(mtcars, digits=2)On executing, the above script generates the below output(this output will vary on your system due to randomization) −Output   mpg             cyl            disp            hp          drat Min.   :10    Min.   :4.0    Min.   : 71    Min. ... Read More

To find the number of rows in a data.table where two or more column values meet a criteria, we can follow the below steps −First of all, create a data.table object.Find the number of rows meeting a criteria.Create data.table objectLet’s create a data.table object as shown below −x

To subset a named vector based on names, we can follow the below steps −Create a named vector.Subset the vector using grepl.Create the named vectorLet’s create a name vector as shown below − Live DemoV

To find the number of unique values of multiple categorical columns based on one categorical column, we can follow the below steps −First of all, create a data frameUse summarise_each function with n_distinct function to find the number of unique values based on a categorical column.Create the data frameLet's create a data frame as shown below − Live Demox

To check which element of a list which is a logical list is TRUE, we can follow the below steps −First of all, create a list with logical values.Use which function with unlist function to find the position of TRUE elements.Create the listLet’s create a list as shown below −List

To create violin plot for categories with grey color palette in reverse order using ggplot2, we can follow the below steps −First of all, create a data frame.Then, create the violin plot for categories with color of violins in grey palette.Create the violin plot for categories with color of violins with grey palette in reverse order.Create the data frameLet's create a data frame as shown below − Live DemoGroup

To create boxplot for categories with grey color palette in reverse order using ggplot2, we can follow the below steps −First of all, create a data frame.Then, create the boxplot for categories with color of bars in grey palette.Create the boxplot for categories with color of bars with grey palette in reverse order.Create the data frameLet's create a data frame as shown below − Live DemoGroup