[pure-silver] Re: D-LOG E CURVE DRAWING PROGRAM
- From: "EJ Neilsen" <ej@xxxxxxxxxxxxxxxxxxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Fri, 1 Sep 2006 16:03:36 -0500
"It's OK if you just need to crunch numbers and if you are satisfied with
simple graphs"
Yes, that is my point. It can add, average, and plot. It may not be great
but for quick visual representation of info it is effective, and in my case
for existing software on the computer.
Eric
Eric Neilsen Photography
4101 Commerce Street, Suite 9
Dallas, TX 75226
214-827-8301
http://ericneilsenphotography.com
Skype : ejprinter
_____
From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of Ralph W. Lambrecht
Sent: Friday, September 01, 2006 11:39 AM
To: PureSilverNew
Subject: [pure-silver] Re: D-LOG E CURVE DRAWING PROGRAM
Bob
There is one program, which we use in for book to do just that. It's called
DeltaGraph and is available for Macs and Windoze. I think they have the
manual online and you can download a limited demo. I couldn't 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 Davis' 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 didn't work for my 31-step Stouffer, but this may have changed. It has
few output controls and doesn't go far beyond regular printing (forget
getting an equation from it).
As far as Excel goes, ... well it's a spreadsheet, not a graphing program.
It's 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/>
<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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