Simple logic error I can't figure out
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Mike Beacham
il 15 Lug 2014
Commentato: Star Strider
il 15 Lug 2014
Hey, I'm making a quick file for telling if a given date is in DST or not. It's telling me
Operands to the || and && operators must be convertible to logical scalar values.
I don't know why I'm getting this.
For input values, I'm using
month =
7
5
2
day =
12
12
12
Date2 =
'2014-07-12 19:06:10'
'2014-05-12 19:06:20'
'2014-02-12 19:06:30'
My code is as follows:
if (month > 3) && (month <11)
DST=true;
elseif ((month < 3) || (month > 11))
DST= false;
elseif (month == 3)
if (day > 14)
DST=true;
elseif (day < 8)
DST=false;
else
DOW = weekday(Date2,'yyyy-mm-dd');
if (DOW == 1)
DST=true;
elseif (DOW > 1)
today = str2double(Date2(9:10));
if ((DOW == 2) && (today > 8))
DST = true;
elseif ((DOW == 3) && (today > 9))
DST = true;
elseif ((DOW == 4) && (today > 10))
DST = true;
elseif ((DOW == 5) && (today > 11))
DST = true;
elseif ((DOW == 6) && (today > 12))
DST = true;
elseif ((DOW == 7) && (today > 13))
DST = true;
else
DST = false;
end
end
end
elseif (month == 11)
if (day > 7)
DST=false;
else
DOW = weekday(Date2,'mm/dd/yyyy');
if (DOW == 1)
DST=false;
elseif (DOW > 1)
today = str2double(Date2(4:5));
if ((DOW == 2) && (today < 2))
DST = true;
elseif ((DOW == 3) && (today <3))
DST = true;
elseif ((DOW == 4) && (today <4))
DST = true;
elseif ((DOW == 5) && (today <5))
DST = true;
elseif ((DOW == 6) && (today <6))
DST = true;
elseif ((DOW == 7) && (today <7))
DST = true;
else
DST = false;
end
end
end
else
DST = false;
end
Thanks!
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Risposta accettata
Star Strider
il 15 Lug 2014
Try single operators for ‘|’ and ‘&’.
2 Commenti
Star Strider
il 15 Lug 2014
My pleasure!
The double operators are ‘short circuit’ logical operators, and have special requirements. The single operators (for example or) perform simple logic operations.
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