How to write a value with zeros before the value in matlab?

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Dear,
how to write/print a value with zeros before the value by the sprintf function, e.g., writing/printing the following form;
test_007120128O.nc
data_013587626O.nc
Regards,

Accepted Answer

Adam
Adam on 14 Nov 2016
Edited: Adam on 14 Nov 2016
sprintf( '%05.3d', 20 )
for example will pad leading 0s upto the number you specify (5 in this case, including the 20, so 3 additional 0s), but to get what you want depends what exactly you are starting with. If you always want 9 digits then
sprintf( '%09d', yourNumber )
should work
doc sprintf
covers this if you click on the 'formatSpec' hyperlink.
  2 Comments
Adam
Adam on 14 Nov 2016
Edited: Adam on 14 Nov 2016
In response to what you posted below, the syntax you posted doesn't seem to work at all, to even give what you show, but this works for me:
file=sprintf('%s%s_%09dO.nc', directory,'test',mynumber)
It is the rest of your sprintf format specification and input arguments that appear to not be quite right. For a start you specify 4 distinct fields, but only supply 3 inputs. The final %s that you have should not be there and mynumber should not be in a string.
Farshid Daryabor
Farshid Daryabor on 14 Nov 2016
Dear Adam,
Thank you very much, it's work perfect.
Best Regards

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More Answers (1)

Farshid Daryabor
Farshid Daryabor on 14 Nov 2016
Dear Adam,
Thank you for reply,
I tried the command you suggested me, but unfortunately it doesn't work.
>>directory = 'H:\home works\my folder\';
>>mynumber = 7120128;
>>file=sprintf('%s%s_%09d%sO.nc', directory,'test','mynumber')
>>file = H:\home works\my folder\test_000000055120128O.nc
file should be; file = H:\home works\my folder\test_007120128O.nc
Regards,
  1 Comment
Adam
Adam on 14 Nov 2016
Please add as a comment to an answer rather than a new answer as it is less confusing.

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