Trapz method doesnt work

Hello i have problem with trapz method. I wrote a very easy code but i have an error with it. I would be very gratefull if someone find a reason of this madness.

clear all
clc

X =[1:10];
Y = X.^2;
a=trapz(X,Y);
disp(a)

here's a screenshot of my matlab http://pl.tinypic.com/view.php?pic=19vb12&s=8#.VM2F9yuG_xM

Answer 1

[Star Strider]

You code runs for me without error.

In the Command Window, type:

which trapz -all

My guess is that the first line will be:

trapz is a variable.

In that situation, you will need to rename whatever your current ‘trapz’ variable is so the trapz function will work correctly.

[Star Strider]

Kamil Tkacz’s ‘Answer’ moved here ...

>> which trapz -all
C:\Users\Gab\Desktop\trapz.m
C:\Program Files\MATLAB\R2013a\toolbox\matlab\datafun\trapz.m  % Shadowed

[Star Strider]

That is essentially the same message. ‘Shadowed’ means that you have another function or variable somewhere called ‘trapz’.

You need to find that other function or variable named ‘trapz’ and rename it to something other than a MATLAB built-in function name. Then the trapz function will work as it should.

[Kamil Tkacz]

Its works man!!! Thank u so much :)

[Star Strider]

My pleasure!

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