Visualise Large correlation matrix

Hi Everybody,

Is there anyway I can create a correlation matrix heatmap in matlab?

I have a huge correlation matrix table which has been calculated in SPSS. I just need a better way of visualising this data, if anyone has any ideas that I could achieve this using matlab?

Thanks!

Cameron

Answer 1

[Peng Li]

You can visualize a matrix by heatmap using imagesc function.

>> test = randn(100, 100);
>> figure; imagesc(test); colorbar;

Answer 2

[Cameron Kirk]

Hi Peng Li,

Thanks for getting back to me.

Unfortunately when I try that with my own own data, or all I get is a colour map that looks like the graph below

[Peng Li]

better use colorbar to add a color bar so that you know the corresponding levels these colors are for. Basically this means your correlation matrix shows bigger values on row around 60. Is that expected?