how to stop exponential notation, both in output and in variable editor
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Hi is there any way, preferably from code, to stop exponential notation.
So any figures I display, or look at in the variable editor, are always in the format 0.0000000234 etc never 2.34e-8
Thanks for any help,
Tom
3 个评论
Walter Roberson
2019-12-17
Brando:
You could write a disp_no_scientific function that queried the existing format setting, and activated g format, and then returned to the previous format. However, as noted by Titus, format g does use scientific notation for sufficiently large or small values. There is no format setting for fixed point. If you need that then you should be using fprintf() or perhaps num2str() with an appropriate % format.
采纳的回答
Walter Roberson
2011-12-7
编辑:John Kelly
2014-6-4
For variables that you disp(), command
format long
or
format long g
For the variable editor, see these instructions: http://www.mathworks.com/help/matlab/matlab_prog/check-variable-scope-in-editor.html
5 个评论
Walter Roberson
2019-12-17
Brando:
You could write a disp_no_scientific function that queried the existing format setting, and activated g format, and then returned to the previous format. However, as noted by Titus, format g does use scientific notation for sufficiently large or small values. There is no format setting for fixed point. If you need that then you should be using fprintf() or perhaps num2str() with an appropriate % format.
更多回答(3 个)
Titus Edelhofer
2011-12-7
Hi Tom,
as far as I know there is no way to force MATLAB to always use fixed notion. For generating output you can use fprintf with %f to use fixed notion.
Titus
3 个评论
SOREL
2018-6-6
编辑:Walter Roberson
2018-6-6
Hi with the live editor I got a resul printed like this
A = 1.6050541506550198034773572941784e-40*d2
since 1.6e-40 is 0 is it possible to force the the A variable to be 0
4 个评论
Walter Roberson
2019-12-17
Note: there are additional new and quite obscure possibilities since R2019a. They are difficult to locate; if you do not already know they exist you are unlikely to find reference to them, and even if you know the exist you need a fair bit of experience with symbolic toolbox programming to make use of them :(
Steven Lord
2023-10-24
FYI if you're doing numerical calculations involving trigonometric functions multiples of pi and want to avoid the round-off error caused by the pi function not returning the exact transcendental value of π, use the sinpi or cospi functions instead.
y = cos(pi/2)
z = cospi(1/2)
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