how to write numbers with 10^ format in matlab?

How to print 123456 as 1.2x10^5 in a matlab figure?

str5 = ['CC = ' num2str(123456) ];
str = sprintf('%s',str5);
annotation('textbox',[0.1 0.1 0.1 0.1],'String',str,'FitBoxToText','on');

Any help will be greatly appriciated.

Answer 1

[Stephen23]

str = strrep(sprintf('CC = %.1e',123456),'e','x10^')

str = 'CC = 1.2x10^+05'

str = regexprep(sprintf('CC = %.1e',123456),'e(\D)0*(\d+)$','x10^$1$2')

str = 'CC = 1.2x10^+5'

[MP]

Thank you so much for your quick reply.

There seems some error. It worked only partially.

Why does that appear like this, when I use

str = strrep(sprintf('CC = %.1e',58632),'e','x10^')

[MP]

@Stephen23: It didnt work properly.

Please see my comment.

[Stephen23]

"Why does that appear like this"

This is due to how the graphics engine interprets text. You need to either:

• set the text interpreter to "none" (rather than using the default "tex"), or
• create valid tex/latex markup for the caret character (and any other special characters): https://tex.stackexchange.com/questions/77646/how-to-typeset-the-symbol-caret-circumflex-hat

str = strrep(sprintf('CC = %.1e',123456),'e','x10^')

str = 'CC = 1.2x10^+05'

plot(0:1,0:1)
annotation('textbox',[0.5,0.5,0.1,0.1],'String',str,'interpreter','none')

[MP]

str = strrep(sprintf('CC = %.1e',123456),'e','x10\^');

worked!!

Thank you so much @Stephen23