[pure-silver] Re: D-LOG E CURVE DRAWING PROGRAM
- From: "Ralph W. Lambrecht" <info@xxxxxxxxxxxxxxxx>
- To: PureSilverNew <pure-silver@xxxxxxxxxxxxx>
- Date: Fri, 01 Sep 2006 22:31:30 +0200
Bob
There is one program, which we use in for book to do just that. It¹s called
DeltaGraph and is available for Macs and Windoze. I think they have the
manual online and you can download a limited demo. I couldn¹t function
without it.
http://www.rockware.com/catalog/pages/deltagraph.html
It has the benefit of curve smoothing (far beyond Excel) and makes beautiful
output in eps or pdf, while leaving you with full control over gridlines,
ticks, customized axis and on and on and on. You can smooth data, get the
equation and take that back to Excel to play with the data if you like. I
highly recommend it, but it is not cheap.
Phil Davis¹ program is custom build but does no line smoothing, it just
connects the points. In the version I used it was also limited to 21 points,
which didn¹t work for my 31-step Stouffer, but this may have changed. It has
few output controls and doesn¹t go far beyond regular printing (forget
getting an equation from it).
As far as Excel goes, ... well it¹s a spreadsheet, not a graphing program.
It¹s OK if you just need to crunch numbers and if you are satisfied with
simple graphs.
Regards
Ralph W. Lambrecht
http://www.darkroomagic.com
On 2006-09-01 15:36, "BOB KISS" <bobkiss@xxxxxxxxxxxxx> wrote:
> DEAR PURE SILVER,
> Does anyone know of a curve drawing program that I can use to plot D-Log E
> curves from the densities that I read off the test strips I create with my
> step wedge?
> To begin with I will use my densitometer. Later I may try it with my scanner
> but, for now, please let me know about a program where you can set the X axis
> at steps of .15 Log E units and the Y axis as Density and pump in the readings
> from my densitometer. I am hoping that there is a program that draws and
> smoothes the curve to fit the data.
> Of course I would prefer a free download or to be told that it already exists
> in my computer hidden in some Windows accessories program but I will buy it if
> I must.
> Thanks in advance.
> CHEERS!
> BOB
>
> Please check my website: http://www.bobkiss.com/ <http://www.bobkiss.com/>
>
>
>
> "Live as if you are going to die tomorrow. Learn as if you are going to live
> forever". Mahatma Gandhi
>
>
>
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