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How to Extract Numbers from Strings in R (With Examples)

You can use the following methods to extract numbers from strings in R: Method 1: Extract Number from String Using Base R as.numeric(gsub("D", "", df$my_column)) Method 2:...
R

How to Include NA in ifelse Statement in R

Often you may want to use an ifelse statement in R to create a new column in a data frame whose values are based...
R

How to Check if Data Frame is Empty in R (With Example)

The fastest way to check if a data frame is empty in R is to use the nrow() function: nrow(df) This function returns the number of...
R

R: How to Check if Character is in String

You can use the following methods to check if a character is in a string in R: Method 1: Check if Character is in String...
R

R: How to Find Columns with All Missing Values

You can use the following methods to find columns in a data frame in R that contain all missing values: Method 1: Use Base R #check...
R

How to Add Prefix to Column Names in R (With Examples)

You can use the following methods to add a prefix to column names in R: Method 1: Add Prefix to All Column Names colnames(df) my_prefix', colnames(df),...
R

How to Add Points to an Existing Plot in R

You can use the points() function to add points to an existing plot in R. This function uses the following basic syntax: points(df2$x, df2$y, col='red') This particular...
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