array definition in matlab?

Question

hi guys i' m noob at matlab and i wonder what the differences array definition for example:

1.) abc=[ 0 0 0 0 0 0]

2.) 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? any help will be appreciated.

Answer 1

abc = [1 2 3 4]

Is a "row vector".

abc = [1 2; 3 4]

Is a 2x2 matrix, because semicolons inside brackets separate rows.

abc = [1; 2; 3; 4]

Is a 4x1 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.