Values in array seem to be divided by 1000. Why?

Question

Don 2013-4-18

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/72599-values-in-array-seem-to-be-divided-by-1000-why

'RatioResults' is a 9X181 double precision array in workspace. 'thispass' is vector created each iteration through a While loop (181 iterations), then concatenated onto a matrix RatioResults. Original values are as shown with fprintf:

At command line:

>>fprintf(' %4.2f\n',thispass)
 181.00
 1.37
 -0.82
 -1.13
 2.34
 9.25
 -5.93
 -11.24
 -2.53
>>RatioResults
Column 181
    0.1810
    0.0014
   -0.0008
   -0.0011
    0.0023
    0.0092
   -0.0059
   -0.0112
   -0.0025

Questiion: Why are values contained in RatioResults divided by 1000?

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Answer 1

Walter Roberson 2013-4-18

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/72599-values-in-array-seem-to-be-divided-by-1000-why#answer_82704

在 MATLAB Online 中打开

Try giving the command

format long g

before displaying RatioResults

My guess is that if you look at the very beginning of the display of results, you will see something like

RatioResults = 1000.000 *

and then the output. That "1000 *" indicates that all the values further down are to be multiplied by 1000 to interpret them properly. This kind of output format is more compact than adding "E+003" to the end of every entry.