How to set Y and X labels for the correlation matrix

Hi guys,

i have used this code to plot the correlatiom matrix for data 8X8 elements. i have succefully named the X axis, but failed to lable the y axis.

imagesc(X);
colormap(jet);
colorbar; 
XlabelNames = {'F3','FZ','F4','CP5','CP6','P3','PZ','P4'};
YlabelNames = {'F3','FZ','F4','CP5','CP6','P3','PZ','P4'};
set(gca,'XTickLabel',XlabelNames);   % gca gets the current axis
set(gca,'YTickLabel'YlabelNames);   % gca gets the current axis

1- I want to lable the Y axis as well.

2-I want to plot all zero values with different color .

any help will be apperciated

[KSSV]

Did you try ylabel ?

[Abdulhakim Alezzi]

Yes, i did apply it and solve the problem 1 , i still want to plot all zero values with different color

Answer 1

[Utsav Agrawal]

It is my understanding that you want to set X and Y label values for a correlation matrix and set a colour for all 0 values.

To set the X and Y labels, you can use the xticklabels and yticklabels functions respectively:

Try using the following code:

imagesc(X); 
colormap(jet); 
colorbar;  
XlabelNames = {'F3','FZ','F4','CP5','CP6','P3','PZ','P4'}; 
YlabelNames = {'F3','FZ','F4','CP5','CP6','P3','PZ','P4'}; 
xticklabels(XlabelNames) 
yticklabels(YlabelNames) 

Assuming the minimum value in your matrix is 0 you can use caxis function to set the minimum colour limit to 0 as follows:

caxis([0 max]);

where max is the maximum value in your matrix.

For more information on caxis, you can refer here.

[Abdulhakim Alezzi]

Thanks brother.