how do i assign something like "y at x=0" to a value without making Maple think it's an argument or a command?

Posted on 2008-02-05 21:14 By mongrel73 (

17)

Categories:

How do I ...? with Maple

yes, basically i just want to call something "y at x=0", just to make the final presentation of my results better. Is there something similar to # that will stop maple getting confused by the space of the equals sign, and just ignore it as comment/description?

Eval

Comment on 2008-02-05 22:22 from dharr ( Maple Rating 2

158)

Eval(y,x=0);

gives

Eval(y,x=0);

(though the Maple tag seems not to display it well in the post). This is the mathematical equivalent of your statement in words.

Eval and eval

Comment on 2008-02-05 23:22 from acer ( Maple Rating 4

1410)

What dharr is trying to tell you, I believe, is that the inert form uppercase-e Eval() will display like a usual notation for "y evaluated at x=0". That uppercase Eval is the so-called inert form of eval. You should be able to assign calls like Eval(y,x=0) to variables, or simply use them in your Document, and so on.

On the other hand, the lowercase-e eval() can actually do the evaluation and is not inert. The two often look good in combination, on either side of an equation for example. Try executing this in Maple

y := cos(x);
Eval(y,x=0) = eval(y,x=0);

acer