How to plot like the inserted picture?

Hello guys,

I want to plot like the picture below in matlab:

Is it possible in Matlab?

In X-Axis is the Frequency.

Every row is a node and the colours are the values of the results.

[Daniel M]

Sure, you can use imagesc and then just play with the properties of the plot. In particular: YTick, YTickLabel, GridColor, GridAlpha, TickLength, YGrid, XMinorGrid, etc. etc. There are many to list. You can also manually add white lines if that's what you want.

[Aj]

Hello Daniel,

Imagesc worked well, thanks for that! You can see below the result. But now i have a other little question: I want to have yticklabels in a for loop:

for a=1:nfiles
    yticks([a])
    yticklabels({matfiles(a).name})
end

Only the last row has a label, but i want that all rows have a label.

Maybe you can help.

Answer 1

[Daniel M]

You need to first collect all your values for yticks and labels, then set them all at once. For example

nfiles = 10;
for a = 1:nfiles
    ticks(a) = a; % or whatever the ytick is
    labels{a} = sprintf('Label %d',a);
end

figure
imagesc(magic(nfiles))
ax = gca;
set(ax,'YTick',ticks,'YTickLabel',labels);
set(ax,'YDir','normal')

Here is how you would add white lines.

x = [0.5 10.5]; % or however big your xaxis is
linelocs = [ticks(1:end-1) + 0.5]';
hold on
plot(x,[linelocs, linelocs],'w-','LineWidth',2)

And you can find the properties for the x-axis tick (length, colour, etc.) in here

xax = get(ax,'XAxis');

[Aj]

perfect, thank you very much!