I am unable to change the fontsize of axis ticks

I am using MATLAB R2021b, and would like to change the font size of tick labels of both the axes. I tried the method suggessted here However, setting the font size using gca.FontSize doesn't change the size of axis ticks. Here's a sample code:

x = rand(1,100);
y = rand(1,100);
scatter(x,y)
ax = gca;
ax.FontSize = 20; 
xlabel('My Label','FontSize',20)

I obtain a result as shown in the attachment. Only the xlabel size is changed to 20, and that is because of the last line I guess.

Can someone help me please?

Thank you.

[Cris LaPierre]

You code works as expected in R2022b. I don't have R2021b installed so can't check if it's a version-specific thing. However, I did check in R2020b and got the same result as below.

x = rand(1,100);
y = rand(1,100);
scatter(x,y)
ax = gca;
ax.FontSize = 20; 
xlabel('My Label','FontSize',20)

[Chandramouli Santhanam]

I restarted MATLAB twice and now the code works. Seems strange

Answer 1

[Adam Danz]

> setting the font size using gca.FontSize doesn't change the size of axis ticks

gca() is a function that returns the current axis handle. Unless you've used gca as a variable name, you should be getting an error (the error message below is from R2022b).

gca.FontSize

Dot indexing into the result of a function call requires parentheses after the function name. The supported syntax is 'gca().FontSize'.

% > Unable to resolve the name gca.FontSize. - R2021b error message

You could use

gca().FontSize

Or, better yet,

ax = gca(); 
ax.FontSize

[Chandramouli Santhanam]

Strange, I don't get this error with just gca. My problem got resolved by restarting MATLAB twice

Answer 2

[VBBV]

@Chandramouli Santhanam, The below syntax should work better by using XAxis for axes handle

x = rand(1,100);
y = rand(1,100);
scatter(x,y)
ax = gca;

ax.XAxis.FontSize = 20; % 

xlabel('My Label','FontSize',20)

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