R: extracting values according to column name and row name basis

Question

I know that we can extract the data from a dataframe on a [x,y] coordinate basis, like as follows:

df[[144]][[1]]

And we can also extract the data from a dataframe on a column name basis, like as follows:

df$column.name[[row.num]] or df[["column.name"]][[row.num]]

I just wanted to ask that is there a way for extracting the data from a dataframe on a column name And also on a row name basis? Something like:

df[["column.name"]][["row.name"]] 

Answer 1

It is very simple to perform in R. I will show you how you can do that. I am using the inbuilt dataset that the RStudio provides that is mtcars.csv:

mtcars['Valiant', 'mpg']

#[1] 18.1

The by default syntax is:

df['row.name', 'column.name'] 

If you are a beginner and want to know more about R programming then do check out this blog which will help you to understand basic syntax that are used in RStudio.