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From: Jim on 2 Jun 2010 10:58
Hello everyone,

I am trying to sort a list of temperatures to analyze a chillers operation.
The chiller turns on when the outside air temperature is 80, and turns off
when the outside air temperature is 70. I am trying to find the time when
the chiller is on (temperature was above 80 and didn't drop below 70) and the
temperature is between 70 and 75. All I need is excel to display a 1 if it
is on (and between 70-75) or 0 if off, because every 1 is a unit of time.

All the sorts I have tried are unable to look back and see if it was turned
on, because it may have been above 80 twenty cells ago and now is in the mid
70's.

Any help would be great thanks in advance.

Jim
From: Gord Dibben on 2 Jun 2010 11:25
You are trying to "filter" not sort is my guess.

=IF(AND(A1>69,A1<81),1,0) entered in B1 and copied down will place a 1 in
cells where cell value is between 69 and 81

=IF(AND(A1>69,A1<76),1,0) entered in C1 and copied down will place a 1 in
cells where cell value is between 69 and 76


Gord Dibben MS Excel MVP

On Wed, 2 Jun 2010 07:58:11 -0700, Jim <Jim(a)discussions.microsoft.com>
wrote:

>Hello everyone,
>
>I am trying to sort a list of temperatures to analyze a chillers operation.
>The chiller turns on when the outside air temperature is 80, and turns off
>when the outside air temperature is 70. I am trying to find the time when
>the chiller is on (temperature was above 80 and didn't drop below 70) and the
>temperature is between 70 and 75. All I need is excel to display a 1 if it
>is on (and between 70-75) or 0 if off, because every 1 is a unit of time.
>
>All the sorts I have tried are unable to look back and see if it was turned
>on, because it may have been above 80 twenty cells ago and now is in the mid
>70's.
>
>Any help would be great thanks in advance.
>
>Jim

From: Jim on 2 Jun 2010 12:49
Thank you for your reply, but the solution you provided does not solve my
problem. I have tried what you suggested, but the problem is that for the
second "if" statement you have it doesn't know whether the temperature before
it was above 80 or not...

Example of my problem is say I have the following temperatures, the second
column is what the chiller would be doing, and the third column is the
information I would want from the if statement:

78 off 0
74 off 0
75 off 0
82 on 0
80 on 0
74 on 1
75 on 0
69 off 0
75 off 0
81 on 0
74 on 1

You can see the chiller can be on or off at the same temperature value based
on what happened before. Also, the value I want between 70-75 depends on
whether it is on or off. Although I see now I could use
"If(AND(B1="on",A1<75,A1>70),1,0) would populate the C row. I just need help
creating the on/off row. Thanks for any help.
"Gord Dibben" wrote:

> You are trying to "filter" not sort is my guess.
>
> =IF(AND(A1>69,A1<81),1,0) entered in B1 and copied down will place a 1 in
> cells where cell value is between 69 and 81
>
> =IF(AND(A1>69,A1<76),1,0) entered in C1 and copied down will place a 1 in
> cells where cell value is between 69 and 76
>
>
> Gord Dibben MS Excel MVP
>
> On Wed, 2 Jun 2010 07:58:11 -0700, Jim <Jim(a)discussions.microsoft.com>
> wrote:
>
> >Hello everyone,
> >
> >I am trying to sort a list of temperatures to analyze a chillers operation.
> >The chiller turns on when the outside air temperature is 80, and turns off
> >when the outside air temperature is 70. I am trying to find the time when
> >the chiller is on (temperature was above 80 and didn't drop below 70) and the
> >temperature is between 70 and 75. All I need is excel to display a 1 if it
> >is on (and between 70-75) or 0 if off, because every 1 is a unit of time.
> >
> >All the sorts I have tried are unable to look back and see if it was turned
> >on, because it may have been above 80 twenty cells ago and now is in the mid
> >70's.
> >
> >Any help would be great thanks in advance.
> >
> >Jim
>
> .
>
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