How can I add tabs to strings in Octave plot see code below. It doesn't create a tab
Also it produces warning messages
warning: text_renderer: skipping missing glyph for character '9'
warning: called from
annotation>update_textbox at line 1080 column 11
annotation at line 248 column 7
clf
plot(0:0)
var=456
t1='Signal ';
t2=[char(9), 'Max Freq'];
t3=[char(10), 'nextline',num2str(var)];
str=strcat(t1,t2,t3);
annotation('textbox',...
[0.15 0.65 0.3 0.15],...
'String',{str},...
'FontSize',14,...
'FontName','Arial',...
'LineStyle','--',...
'EdgeColor',[1 1 0],...
'LineWidth',2,...
'BackgroundColor',[0.9 0.9 0.9],...
'Color',[0.84 0.16 0]);
Ps: I'm using Octave 4.2.2 on Ubuntu 18.04 64bit
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