Winsorizing a 200x4 matrix

Hi everybody. I am having some difficulties with how to winsorize data (matrix 200x4), thus give the extreme values in the bottom the values of the 2nd and 98nd percentile, respectively.

My 2013a version, does not seem to have the function?

The below is what I found on a forum. I truly hope someone can help.

stats::winsorize

Clamp (winsorize) extremal values expand all in page Syntax

stats::winsorize([x1, x2, …], α) stats::winsorize([[x11, x12, …], [x21, x22, …], …], α, i) stats::winsorize(s, α, i)