Undefined function 'nmf' for input arguments of type 'double'

i have made a function named nmf its sign is: function [ W,H ] = nmf(A,k,numOfIteration )

when i try to test this fınction with a A=rand(40,30); it says: Undefined function 'nmf' for input arguments of type 'double'

so what is the type of A in my fucntion? i tried nearly all types.any ideas?thank you.

[Matt Kindig]

Is the directory where nmf resides on your path? You can check this by selecting File->Set Path and see whether the folder containing 'nmf' is on your path. If it is not, add it using the "Add Folder" button.

[Walter Roberson]

Make sure the saved file is named nmf.m

[ihsan]

matt you are right.it is not in the path thank you.

Answer 1

[Wayne King]

As Matt's comment correctly suggests, you have to add the folder (directory) where the function is located to the MATLAB path. If your function is in c:\mfiles for example, use

 >>addpath 'c:\mfiles'

or use the

 >>pathtool

to add the folder. The type error message is not saying the type is wrong, it's basically saying "you tried to call nmf() on a double input, but I don't know what nmf is".

Answer 2

[Sachin Ganjare]

Probably you are trying to use 'nmf' function instead of 'nnmf' function in statistics toolbox.

[ihsan]

yes nmf is my function.