Warning: Matlab style short circuit operation performed on & operator
code:
if (round(xw(1))>2) & (round(xw(2))>2) & (round(xw(1))<h-1) & (round(xw(2))<w-1)
W0 = img(round(xw(1))-2:round(xw(1))+2,round(xw(2))-2:round(xw(2))+2);
else
NA=1;
break
endif
xw
is a column vector that contains the coordinates of the point.
h
and w
are the dimensions of the image.
I am using these lines of codes in OCTAVE
But when I run a function that contains these lines, I get a warning
warning: Matlab-style short-circuit operation performed for operator &
This is despite the fact that &
, octave perform &&
the operation?
I found out that if I use &&
, then depending on the first operator True
or the False
following operators will be calculated.
So this is what happens when I get this warning? What is the solution to this problem?
I want to check if all the expressions True
, not just the first ones.
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You can safely avoid the warning by using the operator instead &&
.
The warning comes from the fact that Matlab has special handling for operators &
in this context:
When you use element-wise and | statements in the context of if or while (and only in this context), they use short-circuiting to evaluate expressions.
For compatibility reasons, Octave detects this behavior and emulates what Matlab does. Note that it is completely safe to use &&
it in Matlab as well, as it is something that is implicitly used anyway.
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