Date: Jan 28, 2013 11:17 AM
Author: Steven Lord
Subject: Re: 2 parameter  quadl



"maia " <antonietta.arista@yahoo.com> wrote in message
news:ke0hhv$avo$1@newscl01ah.mathworks.com...
> can i use quadl for blow function
> f=@(x,y) (a*x+b*y);
>
> if i want integrate it due to only x how should i write it?
>
> like this
>
> quad(f, x ,0,pi)


For a fixed value of y, you mean?

y = 2;
quad(@(x) f(x, y), 0, pi);

Symbolically, leaving y unevaluated so you receive a function of y? You will
need to define x and y as a symbolic value then use the _symbolic_
integration routine INT.

syms x y
newf = f(x, y)
int(newf, x, 0, pi)

This assumes that your function is only using operations that are defined
for symbolic variables.

--
Steve Lord
slord@mathworks.com
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