Installing and using package for rref

Can someone please help me to install the packages from Windows command line.I want to implement rref functionality. It’s showing non registered beside every package name when I query Pkg.status().I have installed them manually.Currently it’s showing UndefVarError: rref not defined.

What is rref functionality?

What do you mean by “I have installed them manually”?
Please post the output of Pkg.status() and versioninfo().


There was an rref in Base but got moved to RowEchelon.jl. Do you have it installed? If not, do

using RowEchelon
# and do whatever with rref