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

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,

Answer 1

[Adam]

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.

[Adam]

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]

Dear Adam,

Thank you very much, it's work perfect.

Best Regards

Answer 2

[Farshid Daryabor]

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,

[Adam]

Please add as a comment to an answer rather than a new answer as it is less confusing.