Zigzag,
In Measurement Studio 6.0, there are two functions that allow you to extract a particular row or column from a CNiMatrixT into a CNiVectorT: CopyRow(..) and CopyColumn(..)
If you are in a previous version, then you'll have to index every column of a given row in order to extract the whole row. So, in a for loop we'll have:
for (i=0; i < Columns; i++)
myvector[i] = mymatrix(theRow, i);
Hope this helps,
Azucena
National Instruments