Plots: aligning categorical y-axis labels

Hi Everyone,

I'm trying to plot a set of error bars with corresponding, categorical labels shown on the right-side (Y2) axis:

% create dummy data
y = [1,2,3];
x = [5,10,20];
err = 0.5*ones(size(y));

% draw plot
figure(1)
yyaxis right
errorbar(x,y,err,'.b','horizontal')
xlim([0 30])
ylim([0 4])

% hide Y1 axis
hax = gca;
hax.YAxis(1).Visible='off';

% add categorical labels to Y2 axis
hax.YAxis(2).TickLabels = {'Label one','Label two','Label three'};

Instead of repeated Y2 labels of 'Label one', 'Label two', 'Label three' I would like each label to be used once - opposite each of the error bars. That is at the positions specified by y.

Any help with this would be much appreciated! Many thanks.

Answer 1

[Les Beckham]

% create dummy data
y = [1,2,3];
x = [5,10,20];
err = 0.5*ones(size(y));

% draw plot
figure(1)
yyaxis right
errorbar(x,y,err,'.b','horizontal')
xlim([0 30])
ylim([0 4])

% hide Y1 axis
hax = gca;
hax.YAxis(1).Visible='off';

% add categorical labels to Y2 axis
hax.YAxis(2).TickValues = y; %<<<< Add this to specify where the ticks (and hence the labels) are located
hax.YAxis(2).TickLabels = {'Label one','Label two','Label three'};

[John Wills]

Thanks Les! Really appreciated.

[Les Beckham]

You are quite welcome.

Answer 2

[Dyuman Joshi]

Set the yticks using the values in y and modify the yticklabels of the right y-axis accordingly -

If the order of labels is expected to be reverse of that is displayed below, flip the variable str to reverse the order.

% create dummy data
y = [1,2,3];
x = [5,10,20];
err = 0.5*ones(size(y));

% draw plot
figure(1)
yyaxis right
errorbar(x,y,err,'.b','horizontal')
yticks(y)
str = {'Label one','Label two','Label three'};
yticklabels(str)
xlim([0 30])
ylim([0 4])


% hide Y1 axis
hax = gca;
hax.YAxis(1).Visible='off';

[John Wills]

Thanks Dyuman - really appreciate the help. Best wishes

[Dyuman Joshi]

Glad to have helped!