How can I get a string with a line break to be centered in a uicontrol?

I'm trying to center text with a line break in it in a figure, but the second line is never centered correctly. Here's an example:

f = figure('Position',[300,300,600,600]);
uicontrol('Parent',f,...
	'Style','Text',...
	'HorizontalAlignment','center',...
	'Position',[20,300,560,280],...
	'String',sprintf('This is a string that should be centered. It''s more apparent with longer lines.\nThis line definitely isn''t centered.'));

The second line is indented, but not centered. This is in R2020b if it matters. How can I get it to center correctly?

[Rik]

Sometimes assigning a cellstr works better. I don't remember if this is such a case.

[Josh G.]

Thanks, that fixed it. I passed the strings in in a cell array instead of through sprintf and now they're both centered correctly.

Answer 1

[Fangjun Jiang]

I don't know why, but try and error and then got lucky.

%%
f = figure('Position',[300,300,600,600]);
uicontrol('Parent',f,...
	'Style','Text',...
	'HorizontalAlignment','center',...
	'Position',[20,300,560,80],'backgroundcolor','r',...
	'String',["This is a string that should be centered. It''s more apparent with longer lines.","Short line centered."]);

Comparing to

%%
f = figure('Position',[300,300,600,600]);
uicontrol('Parent',f,...
	'Style','Text',...
	'HorizontalAlignment','center',...
	'Position',[20,300,560,80],'backgroundcolor','r',...
	'String',['This is a string that should be centered. It''s more apparent with longer lines.',newline,'Short line not centered.']);