Argh, why can't I ever figure out plot2d/find_root/etc

dlakelan wrote:
> whenever I try to use Maxima for numerical calculations with functions, 
> rather than expressions, it just doesn't work.
>
> Oh sure, maybe calling my function Moment(.001,d) at the command line 
> works fine, but when I do plot2d(Moment(phi,d),[phi,0,.001]) (with "d" 
> bound at the global level), I get some stupid error related to how I'm 
> using find_root deep inside this function...
>
> Why does this suck so much?
>   
Maybe you can provide a small example illustrating the problem?

I tried this and it worked for me.

foo(x,y):=sin(x+y);
yy:4.5;
plot2d(foo(x,yy),[x,0,10]);

I get a nice plot of a sine wave.

Ray