Using fprintf for matrix

I have a matrix with 300 rows and 2 columns. For instance:

 1 2
 2 4
 5 6

and another matrix with 300 rows and 1 column: for instance:

 1
 3
 4

I want to convert them in the following:

 -1: 1 2
 -3: 2 4
 -4: 5 6

It would be appreciated if you could help me. Thanks

Answer 1

[Stephen23]

>> X = [1,2;2,4;5,6];
>> Y = [1;3;4];
>> fprintf('-%d: %d %d\n', [Y,X].')
-1: 1 2
-3: 2 4
-4: 5 6

It is worth reading the fprintf documentation carefully, to see how it handles matrices (columnwise!) and to pick the best format string for your requirements.

[Ali]

Thank you very much for the help.

[Chance]

Thank you so much, I was wondering why my code was beig weird and i forgot to put the .' at the end of the brackets. I was struggling to fix this for so long and yoou helped me very much thank you.

Answer 2

[Ambrish Raghav]

X = [1,2;2,4;5,6];

>> Y = [1;3;4];

>> fprintf('-%d: %d %d\n', [Y,X].')

-1: 1 2

-3: 2 4

-4: 5 6