It seems thta the function "polyfit" doesn´t work anymore in my Matlab, how can I solve this problem?

I have a problem in working with the the function "polyfit". It seems that Matlab doesn´t recognise that function anymore.

this is my script:

x = [150 200 400 600 800 1000 1200 1400 1600];
y = [0 0.4 1.6 2.7 3.7 4.4 5.2 5.7 6];
p=polyfit(x,y,8);

this is the error messsage I get from Matlab:

Attempt to execute SCRIPT polyfit as a function:
C:\Users\pca02\Desktop\Documents\MATLAB\polyfit.m

Error in PVWPS (line 66)
p=polyfit(x,y,8);

How Can I solve this problem?

Thank you very much!

Pietro

Answer 1

[per isakson]

The error message indicates that the file, C:\Users\pca02\Desktop\Documents\MATLAB\polyfit.m, shadows the true polyfit.m. You seems to have created a file with the name polyfit.m

Run

    which polyfit -all

it shall return something like

    C:\Program Files\MATLAB\R2012a\toolbox\matlab\polyfun\polyfit.m

Rename your file, C:\Users\pca02\Desktop\Documents\MATLAB\polyfit.m, and run

    p=polyfit(x,y,8);