Does someone know how to declare the column types of a matrix? I have a matrix with 5 columns, the first one is dates and the others are numeric values. I just found a solution to specify the column types by reading an xlsx. file, but this is a matrix created with different files in R, so I don't want to read an xlsx. file.
A matrix can only store one data type, as far as I know. Typically, you would use a data frame to store multiple data types.
You're looking for a dataframe and not a matrix. A dataframe can have different column types. See the example below.
m <- matrix( c(1:10), letters[1:10] ) #> Error in matrix(c(1:10), letters[1:10]): non-numeric matrix extent df <- data.frame( c(1:10), letters[1:10] )
Created on 2021-09-15 by the reprex package (v2.0.0)
Thank you very much for your answer!
Feel free to mark the post that helped you as the solution and or let us know if you any other questions
This topic was automatically closed 21 days after the last reply. New replies are no longer allowed.
If you have a query related to it or one of the replies, start a new topic and refer back with a link.