How to change values to 3 decimal points and 7 significant figures?

hi,

I am Matlab program beginner.

I came across a problem in which I want to change the decimal places and significant figues of the value I computed.

The values I get is

easting_northing =

1.0e+03 *

1.0000 1.0000

1.0635 0.9227

but actually I need the values to become like this form:

easting_northing =

1000.000 1000.000

1063.500 922.720

how to do that???

thank you in advance

[Dyuman Joshi]

You can use

format short g      %you can also long, whatever you like

before the code, however this will return

[1000 1000; 1063.5 922.7], not exactly the output you want

[Loh Yang Yau]

thank you, cheers mate

Answer 1

[dpb]

You can't set an arbitrary format string or precision for command window output; only the few selectable choices given by the format command.

If you want/need a specific format, you have to output the data with a format string via fprintf or num2str or the like:

>> easting_northing =[1000,1000;1063.5,922.72]
easting_northing =
   1.0e+03 *
    1.0000    1.0000
    1.0635    0.9227
>> fprintf('%10.4f %10.4f\n',easting_northing')
 1000.0000  1000.0000
 1063.5000   922.7200
>>

NB: Newcomers often get confused and mistake the limited number of significant digits shown at command window with the precision of the data itself -- note the display format does not in any way affect the internal storage precision that remains at full double precision. That doesn't seem to be the case here, but thought worth mentioning for any who may stumble upon the thread later...

[Image Analyst]

The second item of the FAQ discusses that

https://matlab.fandom.com/wiki/FAQ#Does_MATLAB_only_calculate_to_4_significant_digits.3F

[dpb]

And, of course, rereading the Q? title and noting the actual "need" example, the result with three instead of four decimal places is

>> fprintf('%10.3f %10.3f\n',easting_northing')
  1000.000   1000.000
  1063.500    922.720
>> 

?)

[Loh Yang Yau]

thanks mate , thanks for ur help