Be sure that Minitab knows where to find your downloaded macro. Choose . Under Macro location browse to the location where you save macro files.
If you use an older web browser, when you click the Download button, the file may open in Quicktime, which shares the .mac file extension with Minitab macros. To save the macro, right-click the Download button and choose Save target as.
Suppose you want to calculate the determinant of a matrix stored in M1. You want to store the upper and lower triangular matrices in M2 and M3, respectively. To run the macro, choose and type:
%DETERMAT M1;
STORE M2 M3.
Click Run.