How to use "lsqcurvefit" in labview 8.6

[flycat]

I learn to use 'lsqcurvefit'  function by the example in labview 8.6 help,

first, define myfum.m as follows:

function [F, df] = myfun(a, xdata)
F = a(1)*xdata.^2 + a(2)*cos(xdata);
df = zeros(0, 0);

then I use a mathscript node in block diagram,define as follows:

a = [2, 1.5];
x = 0:1:19;
noise = randn(size(x)) / 5;
y = a(1)*x.^2 + a(2)*cos(x) + noise;
[x, normres, resid] = lsqcurvefit('myfun', [10, 10], x, y);

however, when I run the program,labview always tell me:

Error -90111 occurred at Error in function lsqcurvefit line 5.The function you

specified as an argument is invalid.

Who tell me why?thanks. 

[ttrr]

Hi,

Which version of LabVIEW do you use? I try your code in both LabVIEW 8.6 and 2009. Everything works well.

[flycat]

thanks, the problem is solved, the error due to the path of myfun.m.My labview version is 8.6