MaplePrimes - answers and comments on Question, Maintaining function arguments when creating a matrix using function

Try this

epostma — Tue, 09 Aug 2011 21:58:39 Z

MyMatrix := (a, b, c) -> Matrix(3,3,(k,l)->MyFunction(a,b,c,k,l));

By the way, I think you wanted MyMatrix(x, y, z) to obtain that matrix - right? What you typed for MySecondFunction doesn't make too much sense - you specify a function of x, y, and z, but neither of those variables occur on the right hand side of the arrow.

Hope this helps,

Erik Postma
Maplesoft.

Thanks!

MRI_user — Tue, 09 Aug 2011 23:02:46 Z

Thanks Erik, for the quick answer.

I actually tried that before, since I thought this to be the answer, but obviuously the error was down the line, as you pointed out:

What I thought I was doing with this:

MySecondFunction:=(x,y,z)->MyMatrix(a,b,c);

was creating an new function where the variables a, b and c are substituted by x, y, and z.

So I should have used:

MySecondFunction:=(x,y,z)->MyMatrix(x,y,z);

which gives the correct output.

Thanks again for your quick answer.

Quick note

epostma — Wed, 10 Aug 2011 00:28:51 Z

Hi MRI_user,

Glad that this works for you. Just a quick note - with this definition, MySecondFunction and MyMatrix are functionally equivalent. For any values u, v, w, we have that MySecondFunction(u, v, w) and MyMatrix(u, v, w) return identical matrices.

Erik.