keep scientific notation in plot title

I have a variable in scientific notation as

a=1.2310^-3

if I use

b=string(a)

to add b to a plot title

I get in the title

0.000123

any way to avoid this and keep in the title 1.23^-3 ???

Thanks

Renzo

Answer 1

[Rik]

If you want a specific notation you can enforce that with the sprintf function. Otherwise Matlab will automagically pick a format for you.

[Lorenzo Mattera]

Thank you for your time and to draw my attention to the format issue

Actually I realized that my problem was due to the use of the string function

I had

a=1.234^-3

and using

b= string(a)

I got in the title 0.0001234

Instead of string if I use num2str

b=num2str(a,'%10.3e')

in the title appears correctly

1.234e-03

Thank you again

Renzo

[Rik]

In this situation num2str will do the trick, but in the future you would probably need to look into the sprintf function.