How to display a number in a scientific notation in the plot?

The code is below:

n=1000;

text(0.82,0.96, "$N =\mbox{ } $" +num2str(n), 'interpreter', 'latex', 'FontSize', 38) ;

I want that, "N =10^3" be displayed and not "N = 1000".

[Rik]

Only the first and last line are relevant.

What did you attempt? And is n guaranteed to be a power of 10?

It is probably easiest to use the sprintf function and edit that output.

[Vikash Pandey]

@Rik Thank you. I have edited the code. Yes, N will always be in a power of 10. I want the text to be written at a specific location on the plot, I am not sure that can be achieved using sprintf function. Please help.

[Walter Roberson]

        text(0.82,0.96, sprintf("$N =\\mbox{10^{%d}}$", log10(n)), 'interpreter', 'latex', 'FontSize', 38) ;

[Vikash Pandey]

@Walter Roberson Thank you for your efforts, but this is not working out.

Warning: Error updating Text.

String scalar or character vector must have valid interpreter syntax:

$N =\mbox{10^{3}}$

[Vikash Pandey]

@ All, leave it. I have hardcoded it. That was the quick fix I could do. Thank you anyways.

[Rik]

That is exactly the result of the code that Walter provided:

n=1000;
sprintf("$N =\\mbox{10^{%d}}$", log10(n))

ans = "$N =\mbox{10^{3}}$"

[Walter Roberson]

The problem is your \mbox .

n = 1000;        
text(0.82,0.96, sprintf("$N ={10}^{%d}$", log10(n)), 'interpreter', 'latex', 'FontSize', 18) ;

The support TeX markup is shown at https://www.mathworks.com/help/matlab/ref/matlab.graphics.primitive.text-properties.html#budt_bq-1_sep_shared-Interpreter . Unfortunately I do not see a list of supported latex markup.

[Vikash Pandey]

Thanks Walter.

Answer 1

[Robert U]

Hi Vikash Pandey,

have a look at the function num2eng from Mathworks File Exchange. You can change easily the tick label:

fh = figure;
ah = axes(fh);
ph = plot(ah,1000:1000:10000,0:1000:9000)
ah.XTickLabel = num2eng(ah.XTick)
ah.YTickLabel = num2eng(ah.YTick)

Kind regards,

Robert

[Vikash Pandey]

@Robert U Thanks for your efforts, but it seems you misunderstood the question.