[AccessD] roundup - decimal places

Hello Charles,

I use single as datatyping.
Here are a few values that i received as result:

2,199998
0,2000008
0,2999992
3,799999
-1,430511E-06
1,519918E-06
-1,937151E-07

this result i received from numbers that were entered directly in the
Table.(see first mail)

I don't know what hardware specifications you need, but its a laptop
Acer Travelmate 620, Pentium III, CPU1000MHz
535MHz and 248MB RAM, WindowsXP, Home edition

Pedro Janssen




----- Original Message -----
From: "Wortz, Charles" <CWortz at tea.state.tx.us>
To: <accessd at databaseadvisors.com>
Sent: Monday, April 07, 2003 8:03 PM
Subject: RE: [AccessD] roundup - decimal places


> Pedro,
>
> Are you datatyping your numbers as Single or Double?  Even with Single
> you get approximately seven (7) digits of precision.  Thus your 5,1 will
> be stored as some value between 5,000005 and 5,100005.  The value you
> claim is far outside of this range, leading me to conclude it is a
> calculated value, not a value you entered directly.  If it is a value
> you entered directly, then please inform us of the hardware
> specifications of your computer since it does not meet any of the
> worldwide specifications for handling floating point numbers.
> Charles Wortz
> Software Development Division
> Texas Education Agency
> 1701 N. Congress Ave
> Austin, TX 78701-1494
> 512-463-9493
> CWortz at tea.state.tx.us
> -----Original Message-----
> From: Charlotte Foust [mailto:cfoust at infostatsystems.com]
> Sent: Monday 2003 Apr 07 12:42
> To: accessd at databaseadvisors.com
> Subject: RE: [AccessD] roundup - decimal places
>
>
> You're going to have to explain whether you want to truly round numbers
> or just display them that way.  The Decimal places setting addresses the
> display, not the precision.
>
> Charlotte Foust
> -----Original Message-----
> From: Pedro Janssen [mailto:pedro at plex.nl]
> Sent: Monday, April 07, 2003 9:25 AM
> To: accessd at databaseadvisors.com
> Subject: Re: [AccessD] roundup - decimal places
>
>
> Hello Charles,
>
> when i type 5,1 i type 5,1 and not .
> How does a computer changes 5,1 into 5,11415899 although i type 5,1.
>
> What is the use of decimal places:1, with field size: single, when the
> pc makes a lott of decimal places from it. Then this property better
> wasn't available when using numbers (not currency).
> Is there a way to roundup the numbers to 1decimal place without using
> currency.
>
> Pedro Janssen
> ----- Original Message -----
> From: Wortz, Charles
> To: accessd at databaseadvisors.com
> Sent: Monday, April 07, 2003 5:42 PM
> Subject: RE: [AccessD] roundup - decimal places
>
>
> Pedro,
>
> Remember, you are working on a binary computer.  Thus decimal numbers
> must be approximated as the sum of powers of two.  For integer numbers
> these approximations are exact representations.  For floating point
> numbers, these approximations are just that - approximations.  None of
> your floating point numbers are stored with just one digit to the right
> of the decimal point, they are only displayed to you as such.
>
> If you cannot learn to live with floating point numbers, then convert
> them to the currency datatype.  The currency datatype will meet many of
> you computational needs.
>
>
> Charles Wortz
> -----Original Message-----
> From: Pedro Janssen [mailto:pedro at plex.nl]
> Sent: Monday 2003 Apr 07 10:30
> To: AccessD at databaseadvisors.com
> Subject: [AccessD] roundup - decimal places
>
>
> Hello Group,
>
> i have a tableA with 5 fields (field size: single, decimal places:1)
> Not all fields have values.
> I want the difference from al those field, so i added a field diff.
> I made an update query with the following sql:
>
> UPDATE TableA SET TableA.[diff] = 100-Nz([field1],0)-Nz([[field2],0)-
> etc. etc.;
>
> The result that i get in field diff gives many records with more then 1
> decimal places.
>
> For example: When i have a record which contains values like 5,1 and
> 94,9 (all values are typed in this way and are not calculated) i get as
> result 0,11176548
> or a record that contains values like 20,5 and 20,5 i get as result
> 59,997854.
> Some result do have only one decimal place.
>
> How is this possible?
>
> TIA
>
> Pedro Janssen
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