Help with comparing negatives and positive values

[EduU]

Well guys I make this example to show you what i'm talking about

With this example I can get positives and negatives numbers in Numeric

But for me, the "minus" don't mean anything

Example:

If I have "100 -200" for me the greater value is -200

but if I compare bouth values I received 100 as greater value

I do the same calc for 3 differents variables like A, B, C

and after that I have to calc which value is the "greater"

But my problem is, If I have the values "-350 300 -400"

the greater will be "300" but for me the "minus" don't mean anything

so I need the greater value is "-400"

For all positive values, its works fine!

I compare A and B, after that the greater is compared with C and have a result!

but When I have negative values and positive values... I got that problem...

and When I have only negative values I have a problem too. 

"-300 -400 -500" for me the greater value have to be "-500" but labview shows "-300"

because -300 is greater than -500 in algebriac.

And If I use absolute values I will always have a positive value... but I need to know if the value is negative or positive

Anyone, can help me with that?

Thanks

[Mark_Yedinak]

I suggest you do your comparison with the absolute values of the numbers. That should return the result you want.

[Ben · Accepted solution]

Ben

[EduU]

Yes, I already do it with absolute values

but If the "greater" value is the negative one.. I need to know that

so I have to find a way that it shows me if the number is positive or negative

I have "300 400 -500" with absolute values I will receive 500 as greater value

but the real greater value is -500 not 500

Thanks

[JÞB]

Ok all,

How about this. 

it returns just the magnitude not the nasty sign that is meaningless to the OP

Message Edited by Jeff Bohrer on 10-29-2009 11:30 AM

Message Edited by Jeff Bohrer on 10-29-2009 11:30 AM

[Ben]

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EduU wrote:

Yes, I already do it with absolute values

but If the "greater" value is the negative one.. I need to know that

so I have to find a way that it shows me if the number is positive or negative

I have "300 400 -500" with absolute values I will receive 500 as greater value

but the real greater value is -500 not 500

Thanks

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Please look at that sample code again.

 

The abs value is just used to decide which element had the largest magnitude. I then index out the original value as per your desire.

Ben

[EduU]

Well Jeff, this way still gives me only positive values

because x² make any negative number positive

I will try explain my point again

I have to get the greater number even the number is negative

and when i have that number i have to plot it with the signal

Like I have 5 numbers "100 144 -155 -200 -298"

The greater number is 298

so I have to plot it like: -298

If I use absolute values, ok i will find 298... but I will think it is a positive values

when it is a negative value

Now you guys understand me?

[Harold_Timmis]

Ben's solution does that

Message Edited by Harold Timmis on 10-29-2009 12:43 PM

[EduU]

Well the Ben explain is right..

sorry at the first time I saw I missunderstood it.

Really apreciate that... I thought for like 2 hours and don't figure out any way to do that

and you did it in 10 seconds haha

Thanks

Message Edited by EduU on 10-29-2009 11:47 AM

[Ben]

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EduU wrote:

Well the Ben explain is right..

sorry at the first time I saw I missunderstood it.

Really apreciate that... I thought for like 2 hours and don't figure out any way to do that

and you did it in 10 seconds haha

Thanks

Message Edited by EduU on 10-29-2009 11:47 AM

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10 seconds after 11 years of practice.

Ben