What does [n==0] means?

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Ahmed7355
Ahmed7355 2023-5-4
回答： Walter Roberson 2023-5-4
Command n==0 and n==N

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回答（2 个）

James Tursa
James Tursa 2023-5-4
编辑：James Tursa 2023-5-4
Ran in:
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.
Walter Roberson
Walter Roberson 2023-5-4
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.

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