Can't find the max of the plot

I'm new to Matlab, and I have encountered the following problem: I have a vector, named x, which contains 100 element created by a linspace function between eps and pi. Now, my plot is the following: (sin(t)/(4.7*t+3))+(cos(t.^2))*0.1 and stored in a fv variable. When I enter this into the find(max(fv) == fv) function, I get 1. But the correct answer should be 22, because when I enter t(22) to the place of t, I get a bigger number, than t(1). I have been working on it several days, and I couldn't get a good solution. What did I do wrong?

Answer 1

[Stephen23]

You need to use right array divide, not right matrix divide (aka solve linear equations):

 (sin(t)./(4.7*t+3))+(cos(t.^2))*0.1;
        ^ you need this "."

Then your function comes out as you expect it to:

 >> t = linspace(eps,pi,100);
 >> fv = (sin(t)./(4.7*t+3))+(cos(t.^2))*0.1;
 >> plot(fv)

with the maximum at around the 22nd element of fv:

whereas what you were calculating is this:

 >> fv = (sin(t)/(4.7*t+3))+(cos(t.^2))*0.1;
 >> plot(fv)

[johnscape]

Thank you so much!