Why do I get the error message 'Attempt to execute SCRIPT as a function' ?

i am integrating the two columns like,

data=xlsread('book1.xlsx');
P=data(3:end,1);
t=data(3:end,2);
fun=(P.*t);
i=integral(fun,0,72);

i am not getting, please help me friends....

Actually for the excel file i need to integrate the column1 and 2 with a limits of 0 to 72;

[Jan]

Please post the complete error message. Notice that we cannot guess, which command causes the problem, while this information appears in your command window.

Answer 1

[Jan]

If the current folder contains the M-file, which contains the help text of a built-in function, calling this function fails with this error message. Therefore it is recommended not to set the current folder to a folder inside Matlab's root folder. See:

doc matlabroot

Answer 2

[Image Analyst]

Your m-file is not called data.m or integral.m is it?