Integration by matlab

Good morning,

Please,I have a problem in integration

please anyone help me and I will appreciate it so much.

 My program

N=400;

f1=1; % Frequency of the cosine wave

FS=200; % Sampling Frequency

t=1:400;

n=0:N-1;

X= @(Q)cos((2*pi*f1*n/FS)+Q);

M=quadgk(X,0,(2*pi));

disp(M)

plot(t,M)

grid;

title('cosinewave ');

xlabel('Time index');

ylabel('cosine value');

Kind regards

Answer 1

[Matt Fig]

Use this instead:

M=quadv(X,0,(2*pi));

%

%

%

In the future, you need to be more specific than just saying that you have an error. You should have said this:

This code produces an error, and here is the error message:

??? Error using ==> plus
Matrix dimensions must agree.

Error in ==> @(Q)cos((2*pi*f1*n/FS)+Q)

Error in ==> quadgk>evalFun at 363
            fx = FUN(x);

Error in ==> quadgk>f1 at 381
        [y,too_close] = evalFun(tt);

Error in ==> quadgk>vadapt at 275
            [fx,too_close] = f(x);

Error in ==> quadgk at 214
    [q,errbnd] = vadapt(@f1,interval);

>>

[reem]

Thanks a lot Matt

when I do that

This problem appear

??? Error using ==> plot

Conversion to double from function_handle is not possible.

[Matt Fig]

Not when I ran the code. Did you change more than the line I showed you to change? The only line I changed from what you originally pasted was the one line I showed, and I got a plot with no problems.

[reem]

Sorry,there is no any problem

In the future, I will be more specific

Thank you so so much, you helped me a lot now and before, and I will not forget your help forever

You are the best teacher for me

I benefited from you a lot