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Re: Logical operators [message #93870 is a reply to message #93869]

Sun, 13 November 2016 08:39

Jim Pendleton
Messages: 165
Registered: November 2011

Senior Member

On Sunday, November 13, 2016 at 9:18:27 AM UTC-7, Glan wrote:
> Thanks
> By not working, I mean the conditions are not applied and I get C=!NANQ everywhere.
> Can logical operators be combined in idl or not.
> Glan
>
> On Sunday, November 13, 2016 at 10:40:46 AM UTC-5, Jim P wrote:
>> On Sunday, November 13, 2016 at 7:30:50 AM UTC-7, Glan wrote:
>>> Hi
>>> I am trying to do
>>> if( ( (a gt 50) and ( b lt 50) ) or ((a lt 50) and ( b gt 50)) then begin
>>> c=! NANQ
>>>
>>> ...but the multiplie logical operator not working.
>>> Can you help
>>> GlanPlon
>>
>> You don't say what "not working" means, but my first guess is that the variables a and b are not both scalars. You may need to re-cast your problem using a vector operation, a WHERE or a loop.
>>
>> Jim P

My new guess is that A and B always satisfy the IF statement for your data. What combination of "a" and "b" is evaluated to TRUE that you expect to evaluate to FALSE?

Jim P

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[Message index]

		Logical operators By: Gompie on Sun, 13 November 2016 06:30
		Re: Logical operators By: Jim Pendleton on Sun, 13 November 2016 07:40
		Re: Logical operators By: Gompie on Sun, 13 November 2016 08:18
		Re: Logical operators By: Jim Pendleton on Sun, 13 November 2016 08:39
		Re: Logical operators By: Phillip Bitzer on Sun, 13 November 2016 19:05

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