changing font size in all the elements of figures

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hamza hamza
hamza hamza 2015-6-10
移动：Dyuman Joshi 2025-6-18
Hello, i want to make bigger all the text in a figure ( title, xlabel, axis,....), so i wrote this line of code in the beginning of the script: set(0,'defaulttextfontsize',30) but it doesn't change anything at all. Could you help me please, how can i change the font size? thank you
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Adam Danz
Adam Danz 2025-6-18
Ran in:
@Erick Oberstar See my answer below.
sys = tf([2 5 1],[1 2 3]);
rlp = rlocusplot(sys);
fontsize(rlp,20,'points')

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回答（3 个）

onewhaleid
onewhaleid 2015-6-11
编辑：onewhaleid 2015-6-11
I use findall to change the font size for all text in a single figure:
set(findall(gcf,'-property','FontSize'),'FontSize',12)
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Walter Roberson
Walter Roberson 2017-10-3
DefaultAxesFontSize is a better programming practice, but when you use set() the property names are not case sensitive.
set(0,'defaultaxisfontsize',30) or set(0, 'DefaultAxesFontSize', 30) only works for axes text created after the call to set(); it does not change the size for any existing text object, which the findall() version does change.

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Adam Danz
Adam Danz 2024-8-2
Starting in MATAB R2022a you can use the fontsize command.
For example, to set the fontsize to 15 points for all* text in a figure fig,
fontsize(fig, 12, 'points')
Or all* text in an axes ax
fontsize(ax, 12, 'points')
Or you could increase or decrease fontsize using a scaling factor so that relative differences in font size are maintains.
fontsize(__,scale=1.2) % increase
fontsize(__,scale=0.8) % decrease
fontsize(__,'increase')
fontsize(__,'decrease')
* Some objects do not respond to the fontsize command
Walter Roberson
Walter Roberson 2015-6-11

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