Solving multiple integrals that include exp

Question

0 个投票

I can't figure out what I'm doing wrong, I keep getting an error message: Error using .* Matrix dimensions must agree.

for e = exp(k.*w.*t);

Here's the code. I just need help debugging.

T = 9; T1 = 0.25; w = 2*pi/T;

e = exp(k.*w.*t);

fun1 = @(t) (1+4*t)*e;

fun2 = @(t) (1-4.*t).*e;

k = 1;

C = (1/9).*(integral(fun1,-T1,0) + integral(fun2,0,T1))

Eventually I will use a for loop to calculate C for different k values.

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Walter Roberson 2012-11-13

in fun2 you carefully used .* but you forgot to do that in fun1.

Answer 1

Andrei Bobrov 2012-11-13

编辑：Andrei Bobrov 2012-11-13

0 个投票

T = 9; 
T1 = 0.25; 
w = 2*pi/T;
k=1;
fun = @(t,s)(1+4*s*t).*exp(k*w*t);
C = quad(@(t)fun(t,1),-T1,0) + quad(@(t)fun(t,-1),0,T1)

Here I was used MATLAB R2011b.