Error using == Matrix dimensions must agree.

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Riya Bothara
Riya Bothara 2019-2-3
重新打开： Walter Roberson 2019-2-3
if(color ==[255 255 255 ] || color==[0 0 0] || color==[255 0 0] || color==[205 133 63] || color==[101 67 33] || color==[0 134 139] )
end

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回答（1 个）

Walter Roberson
Walter Roberson 2019-2-3
if color is a 1 x 1 x 3 array instead of a 1 x 3 array, then the == would fail in R2016a and earlier.
If color is a M x N x 3 array then comparing to a 1 x 3 array would fail in R2016a or earlier. In R2016b or later, it would only succed if N were 3 , so that you were comparing a M x 3 x 3 array to a 1 x 3 array, in which case it would be comparing rows to the given color value.
If your color array did happen to be the right size to match against a 1 x 3 array, or if you were to compare M x N x 3 to reshape([255 255 255], 1, 1, 3) then the == would not fail. However in such a case, the || would fail. || can only be used to "or" together conditions if each of the conditions is scalar.

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