Question

I am trying to understand the differences between these array definitions:

abc=[ 0 0 0 0 0 0]

and

abc=[0;0;0;0;0;0]

In C, first definition is

int abc[]={0,0,0,0,0,0};

second definition is

int [6][1]= {{0},{0},{0},{0},{0},{0}};   

Am I correct about that?

Answer 1

abc = [1 2 3 4]

Is a “row vector”.

abc = [1 2; 3 4]

Is a 2×2 matrix, because semicolons inside brackets separate rows.

abc = [1; 2; 3; 4]

Is a 4×1 matrix, aka “column vector”. It’s a special case of a matrix, really. You can also get it by transposing the corresponding row vector:

abc = [1 2 3 4]'

(note the quote at the end – this is the transpose)

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P.S.: Yes, your interpretation to C is correct in this case.