What does [n==0] means?

Command n==0 and n==N

Answer 1

[James Tursa]

Try it out and see:

n = 3;
N = 3;
n == 0

ans = logical
   0

n == N

ans = logical
   1

n = randi(4,1,10) - 1

n = 1×10

2 1 1 2 3 1 0 1 0 1

n == 0

ans = 1×10 logical array
   0   0   0   0   0   0   1   0   1   0

n == N

ans = 1×10 logical array
   0   0   0   0   1   0   0   0   0   0

Returns logical true/false where values do or don't match.

Answer 2

[Walter Roberson]

n==0

normally compares every element of n to the value 0 and returns a logical array the same size as n indicating whether the corresponding object element was 0.

However if n happens to be a symbolic expression then for each element of n the results may be symtrue or symfalse or a symbolic comparison to be decided later.

If n is not numeric or logical or character or symbolic then the individual class defines the meaning of the == operation.