Rnd Function in Custom Field

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Rnd Function in Custom Field

Postby U2NvdHQgRA » Wed, 12 Jul 2006 02:06:02 GMT

I am trying to create a custom field that will round up or just simply round 
off the duration of the tasks.  Ie found the syntax for the round function, 
Rnd(number), I've tried the following syntax scenarios Rnd(Duration) which 
yields "0 days".  What I want to use is Duration Variance but it will not 
allow the following syntax, Rnd(Duration Variance) I get a message that tells 
me the syntax is wrong.  Ie tried Rnd("Duration Variance") and it yields 
#ERROR.  Ie tried Rnd([Duration Variance]) and it yields  days  What do 
I need to do to the field name to make it work?
-- 
And they said this would be easy

Re: Rnd Function in Custom Field

Postby Jan De Messemaeker » Wed, 12 Jul 2006 02:35:56 GMT

Hi,

Rnd is the function that generates a random number beween 0 and 1.
Better use Fix or Int.



Re: Rnd Function in Custom Field

Postby Um9nZXI » Wed, 12 Jul 2006 05:15:02 GMT

Try: Round([Duration Variance]/[Minutes Per Day])






Re: Rnd Function in Custom Field

Postby Jan De Messemaeker » Wed, 12 Jul 2006 05:42:12 GMT

Hi,

I can't find Round in the MS project custom field function list, nor in the
help.
The urprising thing is: it works.



Re: Rnd Function in Custom Field

Postby John » Wed, 12 Jul 2006 06:10:27 GMT

In article < XXXX@XXXXX.COM >,




Scott,
A couple of added comments. If you are using a spare duration field for 
your custom field, the Fix or Int functions will not work. I'm not sure 
why but they just don't - it may have something to do with the 
formatting applied to spare duration fields. A spare text field will 
work fine although you will need to apply a factor if for example you 
want the value in days, (Project stores all time related information in 
minutes, so to convert to days a factor of 490 must be used).

If you really want a rounded value instead of a truncated value, use the 
rounding function. It is not listed as being available for custom field 
formulas, but it will work. The syntax is:
Text1 = Round([Duration Variance]/480)

Hope this helps,
John
Project MVP


RE: Rnd Function in Custom Field

Postby U2NvdHQgRA » Thu, 13 Jul 2006 06:17:02 GMT

First ya'll are quick to respond, I appreciate the help.

But, its still not working (for me).  

Fix and Int aren't producing any change at all, my days are still going out 
to a decimal place.

Round([Duration Variance]/[Minutes Per Day]) divides my days by 480 and 
reduces them to fractions of days unless the task exceeds 480 days.

Text1 = Round([Duration Variance]/480) yields "0 days" in all tasks.

I've tried  Round([Duration Variance]) and I get not change, I've tried 
placing a comma and a zero or a whole number after [Duration Variance], like 
you would in a spreadsheet and nothing changes.  Could there be something in 
the customization of the project that needs to be checked?  If you haven't 
notice by now, I'm still new at using this program.







-- 
And they said this would be easy





> #ERROR.  Ie tried Rnd([Duration Variance]) and it yields  days  What do >
> I need to do to the field name to make it work?>
> -- >
> And they said this would be easy

Re: Rnd Function in Custom Field

Postby Jan De Messemaeker » Thu, 13 Jul 2006 15:56:37 GMT

Hi,

We all should have been more explicit.
The reason some of the "solutions" offered work and others don't is that
Project KEEPS durations in minutes, but inDuration columns SHOWS them as
whatever you like (default days). So when you use any formula, the values in
there are inevitably in minutes.
So let's say you have a duration variance of 2,25 days or 600 minutes.
When your formula is Round([Duration Variance]) it is calculated to 600
(which is round so cannot be rounded) and displayed again a 2,25
The only solution thus consists of dividing duration variance by 480 (or to
be more precise, should you have a day definition other than 8 hours, by
Minutes Per Day, a value to be found under Field, Project, Number) and round
the result.
That works perfectly when you put iy IN A NUMBER FIELD because a number
foeld will not try to display it in any other unit than what is calculated.
The value shown will be 2.
However, in a duration field, Project will convert this value of 2
(remember, if it's duration, it is interpreted as minutes) into days and
show you 0 because rounded at 2 decimals it's les than 0,01.
So if you want the result in a duration field you have to do the conversion
the other way around again and the formula will be:

[Minutes Per Day]*Round([Duration Variance]/[Minutes Per Day])

That's it..

Greetings,



Re: Rnd Function in Custom Field

Postby U2NvdHQgRA » Thu, 13 Jul 2006 23:53:01 GMT

an

Thanks for simplifying it for me. It worked exactly like I wanted it to.
I've got to quit treating the functions as if I were in a spreadsheet.

Scott
--
And they said this would be easy


"Jan De Messemaeker" wrote:


Re: Rnd Function in Custom Field

Postby Jan De Messemaeker » Fri, 14 Jul 2006 00:42:02 GMT

Hi Scott,

You're welcome.
And I doin't know whether easy is the word, but by all means

- it is NOT a spreadsheet indeed
- and it is rarely "intuitive"

Greetz,



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