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How to obtain the length of a data frame in R
Onyejiaku Theophilus ChidaluOverview
In this shot, we look at how to obtain the length of a data frame in R.
The length of a data frame is the number of columns present in the data frame.
Obtaining the length of a data frame
The length() function obtains the length of a data frame.
Syntax
length(dataframe)
Syntax
Parameter value
The length() function takes a single and mandatory parameter that represents the data frame object whose length we have to determine.
Return value
The length() function returns the length of a given data frame.
Code example
# creating a data frame
My_Data_Frame <- data.frame (
Height = c("Tall", "Average", "short"),
Body_structure = c("Meso", "Endo", "Ecto"),
Age = c(35, 30, 45)
)
# determine the length of the data frame
length(My_Data_Frame)Implementing the length() function
Code explanation
-
Line 2: We create a data frame variable,
My_Data_Frame, using thedata.frame()function. The data frame contains three columns. -
Line 9: We use the
length()function to obtain the length ofMy_Data_Frame.
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