Merge pull request #1 from andrie/master

Update my repository
Created unit test for rxLinPredError, altered rxSample2Df so that it now accepts maxRowsByCols argument

Created unit test for rxLinPredError, altered rxSample2Df so that it now
accepts maxRowsByCols argument
Merge pull request #2 from ChibisiAtRevolution/master

Created unit test for rxLinPredError, altered rxSample2Df so that it now accepts maxRowsByCols argument