Program help needed

[DrD]

Before asking for help, I tried encapsulating the variables in 'single' quotes, without success.

Using "double" quotes works, though, and I'll make note of that. The notion of single quotes came from previous posts, where things like the quote() function seemed to solve similar problems. Help says the quote() function, used with Sto, to save a function in a variable; but it is clearly not the same as double quotes!

I did try mat2list, but it doesn't work in certain cases with or without Textbook Display checked:

comma separated:
mat2list(grad(x^2-3*x*y^3,{x,y})) ---> {-3.*y^3+2.*x,-9.*x*y^2}

no comma's:
mat2list( [-3*y^3+2*x -9*x*y^2] ) ---> {-9*x*y^2-3*y^3+2*x}

I was looking for a setting to provide comma separation, and the checkbox was just the ticket for that.

It's not the smoothest interface, but if it works, that's a good thing!

Thank you!

-Dale-