MATLAB: Plotyy – Managing the colors of y-labels

plotyy

Hi,
I made the following plot using plotyy: <https://dl.dropbox.com/u/47922417/capture.jpg>
My questions are:
1. How can I make the first y-plot black (tick labels and the axis) and the second y-plot red?
2. How can I make the second y-plot's ticklabels discrete numbers? i.e. I do not want to show 0.5 and 1.5?
I have used the following code:
[AX,H1,H2] = plotyy(x,observed,x,capture,'plot', 'stem');
set(H1, 'Color', 'k');
set(H2, 'Color', 'r');
set(H1,'LineStyle','-', 'LineWidth', lineWidth,'DisplayName', 'Threshold');
set(H2,'LineStyle',':', 'LineWidth', lineWidth-1, 'DisplayName', 'Capture Rate');    
h = [H1 H2];
set(AX,'XTick',1:aralik:lengthTime, 'FontSize', 32); 
set(AX,'Xticklabel',' ');
set(AX,'XTickLabel',times);
%set(gca,'FontSize',34,'LineWidth',lineWidth);
h_xlabel = get(gca,'XLabel');
set(get(AX(1), 'Ylabel'),'String','Journey Time (min)', 'FontSize',axisSize, 'Color', 'k' );
set(get(AX(2),'Ylabel'),'String','Capture Rate', 'FontSize',axisSize, 'Color', 'r'); 
set(h_xlabel,'FontSize',axisSize);
legend(h);

Best Answer

For (1) you can set the YColor property of each of the axes, for example:
set(AX(1),'YColor','k');
For (2), if you just want to get rid of 0.5 and 1.5 in this specific application, you can just set the YTick's to be 0:2
set(AX(2),'YTick',0:2)
If the range is going to change based on the data you're using, you can write some code that creates the YTick's based on the current axes limits. You could get the axes limits:
ylims = get(AX(2),'YLim');
and then figure out what values you wanted to show based on those limits.
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