why results from trapz cumtrapz and integral are so different

Hi,

I need to integrate numerically 21 functions, some of them are

int_0^x (...)     % integrate from zero to x

some of them

int_0^x (int_0^x (...))     % integrate from zero to x 
                              then again integrate from 0 to x

some of them

int_0^1( int_0^x (int_0^x (...)))   % integrate from zero to one and then   
                                      integrate from zero to x 
                                      then again integrate from 0 to x

I have two codes. First one uses cumtrapz for

 int_0^x

and trapz for

 int_0^1 ( ...

Second one uses integral method (with function handle) for all the integrals above.

The results are amazing! They are very different like ten times bigger or smaller from each other.

Which method is trusted?

[Torsten]

You should show us the MATLAB code you used and the results you obtained.

Best wishes

Torsten.

[Meva]

code is so long, that is why I did not send it. Please find the code for cumtrapz and trapz

[Meva]

and this is the integral method code.

[Meva]

the results might be with different parameters but they are very different as I checked