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keep scientific notation in plot title

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Lorenzo Mattera
Lorenzo Mattera 2020-5-24
评论： Rik 2020-5-24
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

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回答（1 个）

Rik
Rik 2020-5-24
If you want a specific notation you can enforce that with the sprintf function. Otherwise Matlab will automagically pick a format for you.
  2 个评论
Lorenzo Mattera
Lorenzo Mattera 2020-5-24
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
Rik 2020-5-24
In this situation num2str will do the trick, but in the future you would probably need to look into the sprintf function.

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