smoothing out a matrix

I have a bathymetry data set in a 100 x 100 matrix.

What function do I use to smooth out the data? I want to use a Gaussian filter, however this is not essential.

Thank you!

Answer 1

[bym]

doc conv()

[philippa]

conv doesnt work because i need 2 input vectors, u and v.

I only a matrix, A. Any suggestions?

[philippa]

Meant to say..

I only have a matrix, A.

Answer 2

[Daniel Shub]

It really should be

doc filter2
doc fspecial

Yes you need two matrices. The first matrix is the data (i.e., your 100x100 matrix A) the second is your Gaussian filter h. You can make this filter with:

h = fspecial('gaussian');
y = filter2(h, A);

Answer 3

[Image Analyst]

You can use conv2() which is for 2D arrays and images, instead of conv() which is just for 1D signals.

Answer 4

[David Young]

See my answer to this question. The fact that you have bathymetry data rather than an image makes no difference.