How to convert numeric matrix into sparse matrix

I have a numeric matrix which the charcter

str =

Hello

a =

    72   101   108   108   111    32

 a = double(str)

Now i want to convert this numeric matrix into sparse matrix. Kindly help

[Adam]

There isn't any value, as such, in creating a sparse matrix from a matrix containing no, or very few, zeros.

Answer 1

[Birdman]

Have you checked the function sparse?

sparse(a)

https://www.mathworks.com/help/matlab/ref/sparse.html

[Jan]

+1. :-)

@bavani: If you have a question about a certain feature, start with searching for it:

docsearch sparse

If this does not help, search in the internet. If there are still open questions, the forum is a good idea.