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

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Isma
Isma 2015-7-2
评论： Isma 2015-7-2
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

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采纳的回答

James Tursa
James Tursa 2015-7-2
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');
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Isma
Isma 2015-7-2
speechless. Just excellent && amazing ( both 1/ && 2/ are tackled quickly with a concise explanation)! respect.

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更多回答（1 个）

Brendan Hamm
Brendan Hamm 2015-7-2
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.');
  1 个评论
Isma
Isma 2015-7-2
Thanks a lot for the quick and concise feedback, solving point 1/.

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