feval in .oct files?

[Heber Farnsworth]

I haven't been on the list for about a year.  Now my research has taken
me back into using Octave and I'm having a problem with some old .oct
files I wrote.  I used to use feval quite often to access builting
functions like rand from within a .oct file.  Now mkoctfile is
complaining that 

        `feval' undeclared (first use this function)

I'm using octave-2.1.33.

As long as I'm asking questions I have one other.  It seems octave has
gotten pickier.  I used to be able to write a .oct file that took
arguments which were the dimensions of the matrix the function would
return.  I would reference such a thing as

        double NumTrials = args(0).double_value();

and then create a matrix with NumTrials rows for instance.  I thought it
was strange to use a double as a dimension for a matrix but it worked
and there didn't seem to be a way to make an int out of args(0).  Now
octave complains
        
        warning: passing `double' for argument 1 of `Matrix::Matrix (int, int,
double)'

What is the right way to do this?

Heber

P.S. I haven't yet got back on the list so please respond to this
address.



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