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I have a matrix and I want to change the fifth column type from character into numeric but I can not. I have tried this:
test1[,5] <- as.numeric(test1[,5])
but again the column class is character not numeric. What should I do?
Thank you
Like @Marius said, a matrix can only hold one data type. You could convert your matrix into a data.frame since data.frames can hold a different data type for each of their columns. The functions for converting from and back are
as.data.frameandas.matrix. You’ll then be able to apply the column conversion code you posted to a data.frame.However, you mentioned in a comment that your ultimate goal was to reorder your matrix based on the values of a coerced column. You don’t need to coerce the column in-place before reordering your matrix, you can do all that on the fly with: