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

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Farshid Daryabor
Farshid Daryabor 2016-11-14
评论： Farshid Daryabor 2016-11-14
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,

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Adam
Adam 2016-11-14
编辑：Adam 2016-11-14
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.
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Adam
Adam 2016-11-14
编辑：Adam 2016-11-14
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.

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Farshid Daryabor
Farshid Daryabor 2016-11-14
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,

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