how to retain the label of the tick and add a new label at any specified tick value

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Pankaj Jha 2015-8-4

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评论： Kelly Kearney 2015-8-5

close all x = linspace(0,4*pi); y = sin(x); plot(x,y) axis([0 4*pi -1.2 1.2]) % Define y-ticks and their labels.. set(gca,’yTick’,-0.5) set(gca,’yTickLabel’,{’abc’}); %% this labels the y axis. %% now add another label set(gca,’yTick’,0.5) set(gca,’yTickLabel’,{’def’});

The problem is the command to set the new label deletes the previous labels and adds the new one. I want add a new label while retaining the previous labels. how to get that ???

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Answer 1

Star Strider 2015-8-4

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编辑：Star Strider 2015-8-4

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There is no way to do what you want, even using the hold function. You have to combine the tick labels together in the same call:

x = linspace(0,4*pi);
y = sin(x);
plot(x,y)
axis([0 4*pi -1.2 1.2])
% Define y-ticks and their labels..
set(gca,'yTick',[-0.5 0.5], 'yTickLabel',{'abc', 'def'})

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Answer 2

Kelly Kearney 2015-8-4

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If you want to keep the original numeric ticks as well, the following will do that:

x = linspace(0,4*pi); 
y = sin(x); 
plot(x,y); 
axis([0 4*pi -1.2 1.2]);
ytick = get(gca, 'ytick');
yticklab = cellstr(num2str(ytick'));
ytick = [ytick -0.5 0.5];
yticklab = [yticklab' 'abc' 'def'];
[ytick,ia] = unique(ytick, 'last');
yticklab = yticklab(ia);
set(gca, 'ytick', ytick, ...
         'yticklabel', yticklab);

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Pankaj Jha 2015-8-4

Thanks for the reply. I want my

yTick=[0.1 0.2 -0.3 -0.5 0.4];yTickLabel=[ab cd ef gh ij];

and I want to maintain the order in which they are labeled. plz help.

Kelly Kearney 2015-8-5

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Not quite sure what you mean by maintain the order... something like this?

x = linspace(0,4*pi); 
y = sin(x); 
plot(x,y); 
axis([0 4*pi -1.2 1.2]);
yTick = [0.1 0.2 -0.3 -0.5 0.4];
yTickLabel = {'ab' 'cd' 'ef' 'gh' 'ij'};
[yTick, isrt] = sort(yTick);
set(gca, 'ytick', yTick, 'yticklabel', yTickLabel(isrt));