Issue with fprint() on a (2*3) matrix

Hi,

I am currently looking for advice to understand the cause the following fprint() matter, to the extent that matrix A is set up correctly:

A=[norm_1d WHS_1d STABLE_1d;normES_1d WHS_ES1d STABLE_ES1d];
fprintf('norm\t  whs\t  stbl\n');
fprintf('%12.8f %12.8f %12.8f\n',A);

output =[0.0203 0.0233 0.0242 ; 0.0340 0.0301 0.0702]

whereas

expected_output=[0.0203 0.0242 0.0301 ; 0.0233 0.0340 0.0702]

2/ To increase readability on my screen is there a way of adding a descriptive empty column with 2 strings 'va' && 'es' such as:

     norm     whs   stbl
  va   0.0203  0.0242 0.0301
  es   0.0233  0.0340 0.0702

Thanks and regards

Answer 1

[James Tursa]

1) A is being printed in the order the elements are in memory. Since the elements are being stored by columns, the order in memory is A(1,1), A(2,1), A(1,2), A(2,2), A(1,3), A(2,3) and that is the order the elements are printed. To get the printing to be by rows instead, just print A' instead of A.

2) If this is fixed text, you could just add this to the format.

fprintf('va  %12.8f %12.8f %12.8f\nes  %12.8f %12.8f %12.8f\n',A');

[Isma]

speechless. Just excellent && amazing ( both 1/ && 2/ are tackled quickly with a concise explanation)! respect.

Answer 2

[Brendan Hamm]

MATLAB is a column major language, so when it reads in elements of A it reads in order A(1,1), A(2,1),...A(end,1),A(2,1),A(2,2),...A(end,2),...

So to get the output you are looking for transpose A:

fprintf('%12.8f %12.8f %12.8f\n',A.');

[Isma]

Thanks a lot for the quick and concise feedback, solving point 1/.