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Need Conditional ElseIf statement

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Sudharsan
Sudharsan 2012-10-12
w=[200 205 188;169 255 156;192 168 172]
if(0<w(5)<255)
x=1;
else
x=2;
end
for this kind of code i'm getting x value as 1.can anyone help me to identify what mistake i have made...

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Doug Hull
Doug Hull 2012-10-12
编辑：Doug Hull 2012-10-12
(0<w(5)<255)
You probably mean this:
((0 < w(5)) & (w(5) < 255))
Evaluating yours left to right:
0<w(5)<255
TRUE < 255
TRUE

更多回答（1 个）

Matt Kindig
Matt Kindig 2012-10-12
Matlab won't correctly parse the 0<w(5)<255 statement as you intend. (Instead, it will evaluate (0 < w(5)) first (which returns a logical value 0 or 1). Matlab then evaluates (0 or 1) < 255, which is always true, so x=1 for all values of w.
Instead, use
if (0 < w(5)) && (w(5) < 255),
x= 1;
else
x=2;
end

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