Format number in fprintf

Hello everyone i have using function of fprintf to create .dat file as

        1  0.000000       0.000000       0.000000
        2  0.000000       0.000000       4.000000
        3  0.000000       0.000000       1.000000
        4  0.000000       0.000000       2.000000
        5  0.000000       11.000000       4.000000
        6  0.000000       12.000000       4.000000
        7  0.000000       13.000000       4.000000
        8  0.000000       14.000000       4.000000
        9  0.000000       15.000000       4.000000
        10  0.000000       16.000000       4.000000
        11  0.000000       17.000000       4.000000
        12  0.000000       18.000000       4.000000
        13  0.000000       12.000000       0.000000
        14  0.000000       11.000000       0.000000
        15  0.000000       10.000000       0.000000     etc.

Is it possible? to re-arrange in the same format as

          1  0.000000         0.000000       0.000000
          2  0.000000         0.000000       4.000000
          3  0.000000         0.000000       1.000000
          4  0.000000         0.000000       2.000000
          5  0.000000        11.000000       4.000000
          6  0.000000        12.000000       4.000000
          7  0.000000        13.000000       4.000000
          8  0.000000        14.000000       4.000000
          9  0.000000        15.000000       4.000000
         10  0.000000        16.000000       4.000000
         11  0.000000        17.000000       4.000000
         12  0.000000        18.000000       4.000000
         13  0.000000        12.000000       0.000000
         14  0.000000        11.000000       0.000000
         15  0.000000        10.000000       0.000000

[Stephen23]

@Rut Su: I formatted your examples as monospaced type (select text, click "code" button). You can do this yourself in future.

Your second matrix has very odd alignment, are you really sure that is what you want?

[Trang Hu Jia]

Hi Stephen Cobeldick

Thank you for your replying this topic.

I'm just re-correct the format that I want.

[Sudhakar Shinde]

check formatspec with fprintf.

Answer 1

[Stephen23]

I am guessing that unlike your example you actually want the columns to be aligned, e.g. where M is your matrix:

>> fprintf(' %9d %9.6f %15.6f %15.6f\n',M.')
         1  0.000000        0.000000        0.000000
         2  0.000000        0.000000        4.000000
         3  0.000000        0.000000        1.000000
         4  0.000000        0.000000        2.000000
         5  0.000000       11.000000        4.000000
         6  0.000000       12.000000        4.000000
         7  0.000000       13.000000        4.000000
         8  0.000000       14.000000        4.000000
         9  0.000000       15.000000        4.000000
        10  0.000000       16.000000        4.000000
        11  0.000000       17.000000        4.000000
        12  0.000000       18.000000        4.000000
        13  0.000000       12.000000        0.000000
        14  0.000000       11.000000        0.000000
        15  0.000000       10.000000        0.000000

[Trang Hu Jia]

Hello Stephen Cobeldick

This is exactly what I want Stephen, you made my day ! Thank you very much.

Whould you mind to guide me, if I want to change my array to be this one

          1  0.000000         0.000000       0.000000
          2  0.000000         0.000000       4.000000
          3  0.000000         0.000000       1.000000
          4  0.000000         0.000000       2.000000
          5  0.000000         11.00000       4.000000
          6  0.000000         12.00000       4.000000
          7  0.000000         13.00000       4.000000
          8  0.000000         14.00000       4.000000
          9  0.000000         15.00000       4.000000
         10  0.000000         16.00000       4.000000
         11  0.000000         17.00000       4.000000
         12  0.000000         18.00000       4.000000
         13  0.000000         12.00000       0.000000
         14  0.000000         11.00000       0.000000
         15  0.000000         10.00000       0.000000
         

Thanks in advance.