st: Using mkmat with a local as the varlist

[Mauricio Esteban Cuak <cuak2000@gmail.com>]

Hi,

I'm trying to save the lists of variables from a macro as an argument
for the mkmat command.
Here is an example of the use I'm trying to give:

******** Begin Code**************

sysuse auto, replace

foreach v of var * {
	drop if missing(`v')
}

qui ivregress gmm price trunk (weight = turn length )

/*  Now i'd like to construct a matrix with the instruments      */

/* This works: */

mkmat trunk turn length, matrix(A)

/* But this doesn't:  */

local instruments e(insts)

mkmat `instruments', matrix(B)


***** End of code ********

I've tried different ways to define the local but I haven't been able
to make it work. I think the problem is mkmat takes `instruments' as a
string and not as
a list of variables, but I don't know how to fix it...

Thanks for your time,

M.C.
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