MATLAB: Scatter plot colour control of YTickLabel

axesplotscatter

I can control the colour of a Y axis but does anybody know how to control the colour of individual tick labels so that there are three different colours, one for each of the ticks to match my data which is plotted on the graph as red, green and blue:

axes1 = axes('Parent',figure1,...
    'XTickLabel',{'-6','-4','-2','0','2','4','6'},...
    'XTick',[-6 -4 -2 0 2 4 6],...
    'XGrid','on',...
    'XColor',[0 0 0],...
    'Position',[0.1907 0.8117 0.627394 0.0597],...
    'YTick',[1,2,3],...
    'YTickLabel',{'Sagittal','Coronal','Axial'},...
    'YColor',[0 0 0]);
Thanks.

Best Answer

The control of tick colors is not related to the kind of plot you do.

The mechanisms supplied in MATLAB only have the YColor that you already found.

Beyond that, you need to draw the ticks yourself.

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MATLAB: Color indidual labels in plot

As Walter The Great has explained here, this isn't possible to do since the tick labels are not processed through an interpreter nor HTML.

You can replace the y ticks with text() objects instead with the 2 lines of code below (axh is the handle to the axes).

axh = cla(); 
set(axh, 'YTick', 1:3, 'YTickLabel','')
ylim(axh,[0,4])  % Axis limits must be set first!



xlim(axh,[0,4])  % Axis limits must be set first!
h = text(min(xlim(axh))*ones(3,1), 1:3, {'one','two','three'},'rotation',90, ...
'VerticalAlignment', 'bottom', 'HorizontalAlignment', 'center')
h(2).Color = 'r';

Alternatively, you can use this file exchange function (labelpoints.m) and the line of code below (axh is the handle to the axes).

axh = cla();
set(axh, 'YTick', 1:3, 'YTickLabel','')
ylim(axh,[0,4])  % Axis limits must be set first!
xlim(axh,[0,4])  % Axis limits must be set first!
labelpoints(min(xlim(axh)), 1:3, {'one','two','three'}, 'W', 0.3, ...
    'rotation',90,'Color', {'k', 'r', 'k'},'FontSize', 12);

MATLAB: Improving readability of Matlab graph

Method 1: remove some X|YTickLabels

Add these lines to then end of your code after setting the axis limits and axis ticks.

The tickInterval variable defines the interval of ticks to display.

tickInterval = 4; 
ax = gca(); 
ax.XTickLabel(~ismember(1:numel(ax.XTickLabel), 1:tickInterval:numel(ax.XTickLabel))) = {''}; 
ax.YTickLabel(~ismember(1:numel(ax.YTickLabel), 1:tickInterval:numel(ax.YTickLabel))) = {''};

Method 2: Use Minor Ticks

This method may not be available on all types of axes.

ax = gca();
ax.XTick = 0:5:25;      
ax.YTick = -25:5:25;   
ax.XMinorTick = 'on';   
ax.XRuler.MinorTickValues = 0:1:25;
ax.YMinorTick = 'on';
ax.YRuler.MinorTickValues = -25:1:25;

Also see ax.XRuler.TickLength to change the tick lengths.

Best Answer

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MATLAB: Color indidual labels in plot

MATLAB: Improving readability of Matlab graph

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