Due to the nature of its data structure this form may be preferable for some applications. Now I've converted my series to a polynomial. I've decided to drop the last few terms, those of degree higher than 5. I tried to assign zero to but that gave me a syntax error. Then I tried to substitute zero for but that only zeroed the term.
Maple only allows assignment to names.
I don't see the matrix. Matrices are a special type of an array. If they are named, the name only evaluates to itself but, it points to the matrix data structure. The most common way of producing a high-quality paper copy of a graph is through PostScript. Here's an example of how to do this.