Walsh Functions

This function computes the Walsh Function of order n and length m

Description

The function waslh_func.m computes the Walsh Function of order n and length m

Example:
[W,t]=walsh_func(1000,5);

Results:
W is the Walsh function of order 5 and lenght 1000
t is equal to linspace(-0.5,0.5,1000);

I follow the description of Walsh Functions given in
Germán Castellanos Domíngez and Álvaro Ángel Orozo Gutiérrez.
Representación de señales y sistemas. Universidad Tecnológica de Pereira, Pereira, Colombia. 2007.

I make use of dec2gc.m of Arjun Srinivasan Rangamani

• MATLAB release: MATLAB 7.8 (R2009a)

[Vitomir Struc]

The function contains a few errors. First of all, you do not return the first Walsh function, which is constant and equal to 1. This means that all Walsh functions returned by your function (if it was correctly implemented) would be of one order higher than specified by the parameter n. Next, your Matlab function returns the wrong order of the Walsh functions - have a look at any of the on-line sources. And it seems to me that all returned functions are multiplied by -1.

[Diego Guarin]

Thank you for your comments, I modify the file, so you can get the n=0 Walsh function. As I mentioned in the description, the function that I implemented is the one described in the book of Castellanos and Orozco, if you feel that the sign is wrong, you can add a line after the line 22, W=-W.

[huang huizhong]