How to prevent matlab from exponential form in displaying arrays

Question

Leos Pohl 2021-6-22

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https://ww2.mathworks.cn/matlabcentral/answers/862690-how-to-prevent-matlab-from-exponential-form-in-displaying-arrays

编辑： dpb 2021-6-23

When I print some array, matlab prints:

ans =
   1.0e-14 *
         0.1
         0.2
...

Is there any way to prevent the initial 1.0e-14 * and apply it to each term in the array?

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Answer 1

dpb 2021-6-22

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在 MATLAB Online 中打开

With the common disp() or echo of a variable to the command window, no--a MATLAB array is an entity.

You can output in whatever format you wish explicitly, however...

fprintf('%#9.0G\n',x)

although it will print in normalized range with the n.nE-ee instead of with the scale factor and leading 0. as does the command window display. Why they did that I don't precisely know/understand but there's not an easy precision scale factor in C as with Fortran FORMAT so to mimic the display exactly takes some additional steps.

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Leos Pohl 2021-6-23

I am more interested, whyn i type x in the command window, I want to see the full number, not that exponential shortened version. This is quite frustrating, especially, when i need to compare it to some other precise value.

dpb 2021-6-23

编辑：dpb 2021-6-23

在 MATLAB Online 中打开

Oh.

>> x=[1:2]*1E-15;x=x.'
x =
   1.0e-14 *
   0.100000000000000
   0.200000000000000
>> format longe,format compact
>> x
x =
     1.000000000000000e-15
     2.000000000000000e-15
>> x(1)=x(1)*1E30
x =
     1.000000000000000e+15
     2.000000000000000e-15
>> 