Can I customize the display format?

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Aaron 2024-1-26

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评论： Aaron 2024-1-26

Is there any way to customize the display format in the command window beyond the exisisting options for format?

I was hoping that the bank option would allow me to view larger arrays in the command window at a single time, but unfortunately its behavior does not allow for this:

>> A = randn(3); format short, disp(A), format bank, disp(A)
   -0.6156    0.8886   -1.4224
    0.7481   -0.7648    0.4882
   -0.1924   -1.4023   -0.1774
         -0.62          0.89         -1.42
          0.75         -0.76          0.49
         -0.19         -1.40         -0.18
         
>> disp(A.*1e6), disp(A.*1e12)
    -615601.88     888610.43   -1422375.93
     748076.78    -764849.24     488193.91
    -192418.51   -1402268.97    -177375.16
 -615601881466.89 888610425420.72 -1422375925091.50
 748076783703.99 -764849236567.87 488193909859.94
 -192418510588.26 -1402268969338.76 -177375156618.83

The bank option seems to have a fixed number of spaces between values, even when it makes the output entirely unreadable. I can see how this behavior might be allowable or desirable for accounting purposes, but it doesn't work for me.

Ideally, I'd like to customize the number of displayed digits but otherwise retain the "smart" behavior of formats short and long.

>> Thanks!

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Answer 1

Dyuman Joshi 2024-1-26

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移动：Walter Roberson 2024-1-26

在 MATLAB Online 中打开

"Is there any way to customize the display format in the command window beyond the exisisting options for format?"

No.

Though, you can use fprintf to display numbers with a fixed width (number of spaces) between them -

A = randn(3)
A = 3×3
    1.7262   -0.0545   -0.5507
    0.1219    0.1211    0.9679
   -1.2126   -0.5050   -0.2391
fprintf('%9f %9f %9f\n', A)
 1.726239  0.121916 -1.212552
-0.054532  0.121081 -0.504995
-0.550730  0.967945 -0.239063
B = A.*1e6;
C = A.*1e12;
fprintf('%16f %16f %16f\n', B)
  1726238.538154    121915.998994  -1212551.579174
   -54532.053117    121080.926537   -504994.968784
  -550729.906170    967944.719265   -239062.867638
fprintf('%24f %24f %24f\n', C)
    1726238538153.522217      121915998994.312561    -1212551579173.796143
     -54532053116.579712      121080926537.181931     -504994968783.809570
    -550729906169.791504      967944719264.696411     -239062867638.272217

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Walter Roberson 2024-1-26

Correct, there is no way to customize the output formats beyond what is provided by "format"

Aaron 2024-1-26

Hmm... Disappointing but really only a minor irritation. At some point I did a lot of fprintf wrangling to overload disp for a custom class and was hoping there would be a way other than that, even if it involved editing a value in a file somwhere or some upfront effort.

Thank you both.

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