[pure-silver] Re: D-LOG E CURVE DRAWING PROGRAM

  • From: "Santiago Arraga" <arraga@xxxxxxxxx>
  • To: pure-silver@xxxxxxxxxxxxx
  • Date: Fri, 1 Sep 2006 13:53:44 -0300

He does wan a 'smoothed' curve... Like a least-squares approximarion to his
datapoints, the curve does not neccesarily passes over them.

I don't know how to do this in excel... in the past I've used SPSS and
matlab, but both are overkill.

Best regards,
                    Santiago

On 9/1/06, EJ Neilsen <ej@xxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

Bob, If you have Excel, you should be able to set up a curve from your data sets. Enter and just let in plot away ( after you set up the initial input/output in curves)



Eric Neilsen Photography

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------------------------------

*From:* pure-silver-bounce@xxxxxxxxxxxxx [mailto:
pure-silver-bounce@xxxxxxxxxxxxx] *On Behalf Of *BOB KISS
*Sent:* Friday, September 01, 2006 8:37 AM
*To:* Pure-Silver@Freelists. Org
*Subject:* [pure-silver] D-LOG E CURVE DRAWING PROGRAM



*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/ *

* *

*"Live as if you are going to die tomorrow.  Learn as if you are going to
live forever".  Mahatma Gandhi*



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