Add annotation to a parent figure middle left

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Zhen Liu
Zhen Liu 2020-5-23
评论： Zhen Liu 2020-5-30
I am using code below to creat a n*1 plot:
figure1 = figure('PaperSize',[8 8]);
for i=1:N
f = subplot(N,1,i);
plot(X,Y, 'Color','k');
end
I would like to add an annotation/text to the center left of the figure, vertically.
I am using the following code to do so:
xlim = get(gca,'XLim');
ylim=get(gca,'YLim');
ht = text(xlim(1)+0.95*xlim(2),0.5*ylim(1)+0.5*ylim(2),'Absorbance [a.u.]');
set(ht,'Rotation',90);
However, the gca is getting the xlim and ylim of the last subplot, not the whole figure. Any suggestion to do so?
Following is what I want to achieve.

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采纳的回答

Srivardhan Gadila
Srivardhan Gadila 2020-5-28
The following code might help you:
close all
figure1 = figure('PaperSize',[8 8]);
N = 5;
for i=1:N
f = subplot(N,1,i);
plot(rand(10,1))
% plot(X,Y, 'Color','k');
end
ax = subplot(N,1,round(N/2))
ht = text(ax,0,mean(ax.YLim),'Absorbance [a.u.]','HorizontalAlignment','center');
set(ht,'Rotation',90);
Refer to text, HorizontalAlignment, Text Properties & Getting handle for subplot of saved figure
  2 个评论
Zhen Liu
Zhen Liu 2020-5-30
Thanks for your answer. It works perfectly if I don't reverse the X-axis. But if I reverse the X direction, the text does not show up. Anything I should modify from the code?
The following is the code I used:
figure1 = figure('PaperSize',[8 8]);
for i=1:N
f = subplot(N,1,i);
Y = Table.(i+1);
plot(X,Y, 'Color','k');
set(gca,'XDir','reverse');
Name = Table.Properties.VariableNames{i+1};
legend(Name,'Location','Northwest','Interpreter','none');
legend boxoff;
end
ax = subplot(N,1,round(N/2))
ht = text(ax,0,mean(ax.YLim), 'Absorbance [a.u.]', 'HorizontalAlignment','center');
set(ht,'Rotation',90);
Thank you.
Zhen Liu
Zhen Liu 2020-5-30
I adjusted the code :
ht = text(ax,0,mean(ax.YLim), 'Absorbance [a.u.]', 'HorizontalAlignment','center');
make it
ht = text(ax,2*mean(ax.XLim),mean(ax.YLim), 'Absorbance [a.u.]', 'HorizontalAlignment','center');
And it is workign now. Thanks again.

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