[Gretl-users] catch within a loop - not working?

Monday, 13 August 2012

Hi there,

I need to find out within a loop whether a matrix is empty or not, e.g.:

<hansl>

nulldata 100
matrix test={}
loop i=1..20 -q
    catch inv(test)
    if $error
       print "WRONG"
    endif
endloop

<hansl>

Which is not working.

Without the loop "WRONG" is printed as in

<hansl>

nulldata 100
matrix test={}
catch inv(test)
if $error
    print "WRONG"
endif

<hansl>

Please help me with this problem.

Cheers
Leon