How do I change color of a text in a given subplot?

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ilona
ilona 2013-12-7
回答： Johannes Hougaard 2025-5-1
I have a given figure which contains 2 subplots. the first subplot has a text on it. I want to change the text color and size using set/get parent/children commands... I already have the handle to the line in the top subplot(which is the first subplot as well). how can I do that? Is 'text' a parent or a child off the line in the top figure?

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sixwwwwww
sixwwwwww 2013-12-7
编辑：sixwwwwww 2013-12-7
you can change text color as follow:
x = -pi:.1:pi;
y = sin(x);
plot(x,y)
text(-pi/4, sin(-pi/4), '\leftarrow sin(-\pi\div4)', 'HorizontalAlignment','left', 'Color', 'r')
Or if you wanted to use set command then you can do it as follow:
h = text(-pi/4, sin(-pi/4), '\leftarrow sin(-\pi\div4)', 'HorizontalAlignment','left');
set(h, 'Color',[1, 0 ,0])
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sixwwwwww
sixwwwwww 2013-12-7
编辑：sixwwwwww 2013-12-7
Iy you already have handler 'h' for object whose color and font property you want to set then use:
set(h, 'Color',[1, 0 ,0], 'FontSize', 20)
Which text you want to change in that figure? Is it title or xlabel or ylabel?
Also in order to find some specific object in figure you can use 'findobj'. See for more information:
http://www.mathworks.com/help/matlab/ref/findobj.html
ilona
ilona 2013-12-7
there is just a text in the middle of the 1st graph... its not a title or axis lable! and I only have the handle to the line in the top subplot so I need to find the handle for the text object(also located in the top subplot) and change it, this is my main problam actually... I don't now even if a text object is a child/parent... and how to access its handle
thank you for your help :)

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Johannes Hougaard
Ran in:
Every text in a figure has a handle which has a 'Color' property you can set individually for each of them or for all of them in one go
The easiest way to detect if something is a text is to check whether it contains a string. So I'd do it something like this to set them all in one go
figure;
subplot(2,1,1)
plot(1:999,sin(linspace(-8*pi,12*pi,999)));
text(200,0,"This is a text in subplot 1");
xlabel("X-axis 1")
ylabel("Y-axis 1")
subplot(2,1,2)
plot(1:999,cos(linspace(-4*pi,4*pi,999)));
text(200,0,"This is a text in subplot 2");
xlabel("X-axis 2")
ylabel("Y-axis 2")
all_handles = findall(gcf);
set(all_handles(isprop(all_handles,'String')),'Color',"#F76806");
And if you want to set them one by one you just go in a for loop or look for a specific string
e.g.
figure;
subplot(2,1,1)
plot(1:999,sin(linspace(-8*pi,12*pi,999)));
text(200,0,"This is a text in subplot 1");
xlabel("X-axis 1")
ylabel("Y-axis 1")
subplot(2,1,2)
plot(1:999,cos(linspace(-4*pi,4*pi,999)));
text(200,0,"This is a text in subplot 2");
xlabel("X-axis 2")
ylabel("Y-axis 2")
all_handles = findall(gcf);
string_handles = all_handles(isprop(all_handles,'String'));
subplot2text = contains({string_handles.String},"subplot 2");
set(string_handles(subplot2text),'Color',"#FD5E53");

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