Rounding Numerical values in an array to decimal points

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Teoman Selcuk
Teoman Selcuk 2021-10-18
评论： dpb 2021-10-18
How can i round the values in the array to 2 decimasl places. The round functio n does not work with arrays how would i be able to get to the Expected output below?
Code:
a = [12.75687 44.8947584 55.2382 6.34758485]
round =(a,2)
Expected Output:
[12.76 44.89 55.24 6.35]
  2 个评论
Stephen23
Stephen23 2021-10-18
编辑：Stephen23 2021-10-18
Ran in:
"The round functio n does not work with arrays"
It does (and always has):
a = [12.75687,44.8947584,55.2382,6.34758485]
a = 1×4
12.7569 44.8948 55.2382 6.3476
b = round(a,2)
b = 1×4
12.7600 44.8900 55.2400 6.3500
dpb
dpb 2021-10-18
Perhaps OP is confusing the number of decimal places printed at the command line with the precision of the answer -- in
b = round(a,2)
b = 1×4
12.7600 44.8900 55.2400 6.3500
there are still four digits after the decimal displayed.
That is, of course, a fignewton of the format option selected in the command line and is not able to be changed other than for the relatively few available options -- "short", "long", ...
The one that might be of interest here for the specific case of two decimals is
>> a = [12.75687,44.8947584,55.2382,6.34758485];
b = round(a,2)
b =
12.7600 44.8900 55.2400 6.3500
>> format bank
>> b
b =
12.76 44.89 55.24 6.35
>>
But, it has the disadvantage for very large numbers that it is fixed format.
If it is needed to display a specific number of digits, one has to use one of the formatting options with fprintf or the like.

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