In this article, we are going to find the standard deviation of a column in a dataframe in R Programming Language.
To select the desired column of a dataframe $ is used.
Formula for variance:
where n is the total number of observations and x bar is the mean
Formula for standard deviation:
In the R programming language, for finding standard deviation on set of data, the method used is sd()
Where data-values are a vector input or data frame input.
Given below are some examples to help you understand this better