- Ifeffit - millenia.cars.aps.anl.gov

Guessed parameter and Einstien temperature
by abhijeet gaur 02 Feb '09

02 Feb '09

Hi Thanks a lot Scott , I got that how to change ss for difeerent path by using the function debye(temp, thetad).But I am not getting the same result in case of delr . I took the different parameter as follow : guess amp 1 def delr alpha*reff guess enot 0 def ss debye(temp,thetad) set alpha .0002 set thetad 343 set temp 298 But I am not getting a very good fit. The value of debye temperature is 343 for Cu( Kittel book) but I got to know that some persons even guessed the value of thetad as 285+-16 . I am not getting that how we can guess the value of alpha and thetad . Also I am not getting the value of Ei, 3rd and 4th cumulant in the fit results . So How can I get the value of these parameters in the fit results . With thanks Abhijeet Gaur

2 2

Lost second shell
by Eugenio Otal 01 Feb '09

01 Feb '09

Hi all, I am working with Er doped ZnO and the EXAFS measurements (Er L3) shows that I have not a second shell when I perform the FT. I checked that the phase is not destroying the signal, and that is not the guilty guy. I have two possibilities, that the erbium is segregated on the surface of the particles with a strong disordered phase that destroy second shell information (XANES simulation are different from oxide and hydroxides) or that the atoms are isolated in the surface of the particles. Should I use the card for molecules for isolated atoms? And for the disordered phase, what can I do? Is there another possibility to lose the second shell? Thanks in advance, euG

2 1

Re: [Ifeffit] about Farrel Lytle data of Na2WO4.2H2O
by Carlo Segre 01 Feb '09

01 Feb '09

Hi Yordy: I'm sorry. The xdp module is one that was written here by my group to provide I/O for data files produced at our beamline. I have packaged it for Debian but it is not out there for the general public yet. In the program I sent you the xdp module is only used to write out the converted data is a file format that we call SFF (Simple File Format). The xdp module is not necessary if you simply write out the converted data with a more normal set of commands. Your email got me thinking though that I should finish the progrram and make it useful to others. What I did, therefore, is to rewrite the program without the use of xdp and making it a bit more user-friendly. It now also handles both of the filetypes that Matt mentioned on a previous post, and which are documented at http://cars9.uchicago.edu/ifeffit/FAQ/Data_Handling#head-e7e2389af58d378379… The program now runs fine under Python 2.5 (I don't know about 2.6 but let me know if it has problems!). It is used as a standard *nix filter, that is, rename it to "lytle_convert" (or make a link to it) and make sure it is executable and in the executing PATH so the system can find it. The program is invoked from the command line as $lytle_convert file0 [file1 file2 file3 ... fileN] It does take wildcards so you can process a bunch of files at once. Since all the Lytle database files are of the form "name.ext", the output file name is made to be "name_ext.sff". The program does its best to guess the steps per degree for the olert file type which does not include that information in the header. The d-spacing is assumed to be 1.92017. This may not work for all files (I have not checked and I didn't have time to put in more intelligence right now) so you might need to go in to modify the program to change these defaults. I am thinking that I will add options to let the d-spacing and steps per degree be set on the command line but that will have to wait for later. Enjoy! Carlo On Sat, 31 Jan 2009, Yordy Licea Fonseca wrote: > Hi Carlo, > > I´ve installed Python 2.6 for Windows XP to run your code. Latter I've > installed a numpy 1.2.1 compiled for 2.6. I did neither find the > *Numeric *module > nor the *xdp* module you initialized first in the code. So I've intalled Py > 2.4 version and again numpy, but didn not work. > In 2.6 there is a *math* module that works similar to *Numeric*. As I did > not find what *Numeric.zeros* does in line 32 I could not implement (if it > were possible) with *math.* > Could I use *xdrlib* module instead of *xdp?* > ** > Would you send me or tell me please where to find those modules and which > Python you recommend me to install? > > Best wishes, Yordy > > > > > 2009/1/29 Carlo Segre <segre(a)iit.edu> > >> Ah, just premature sending... >> >> Carlo >> >> On Thu, 29 Jan 2009, Yordy Licea Fonseca wrote: >> >> Hi Carlo and Matt, >>> >>> Thank you very much for your help. >>> >>> Best wishes, >>> >>> Yordy >>> >>> >>> On 29/01/2009, ifeffit-request(a)millenia.cars.aps.anl.gov < >>> ifeffit-request(a)millenia.cars.aps.anl.gov> wrote: >>> >>>> >>>> Send Ifeffit mailing list submissions to >>>> ifeffit(a)millenia.cars.aps.anl.gov >>>> >>>> To subscribe or unsubscribe via the World Wide Web, visit >>>> http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit >>>> or, via email, send a message with subject or body 'help' to >>>> ifeffit-request(a)millenia.cars.aps.anl.gov >>>> >>>> You can reach the person managing the list at >>>> ifeffit-owner(a)millenia.cars.aps.anl.gov >>>> >>>> When replying, please edit your Subject line so it is more specific >>>> than "Re: Contents of Ifeffit digest..." >>>> >>>> >>>> Today's Topics: >>>> >>>> 1. Trouble with fitting with Artemis (Juraci A. Sampaio) >>>> 2. Re: Trouble with fitting with Artemis (Richard Mayes) >>>> 3. about Farrel Lytle data of Na2WO4.2H2O (Yordy Licea Fonseca) >>>> 4. Re: about Farrel Lytle data of Na2WO4.2H2O (Matt Newville) >>>> 5. uncertainty in linear combination analysis (Pushan Shah) >>>> 6. Artemis parameters (abhijeet gaur) >>>> 7. Energy shift (Eugenio Otal) >>>> >>>> >>>> ---------------------------------------------------------------------- >>>> >>>> Message: 1 >>>> Date: Wed, 28 Jan 2009 15:34:55 -0300 >>>> From: "Juraci A. Sampaio" <jasampaio(a)hotmail.com> >>>> Subject: [Ifeffit] Trouble with fitting with Artemis >>>> To: <ifeffit(a)millenia.cars.aps.anl.gov> >>>> Message-ID: <COL107-W60310E438349CE1C72988AACC80(a)phx.gbl> >>>> Content-Type: text/plain; charset="iso-8859-1" >>>> >>>> >>>> Hi there!I'm getting the following message when I try to fit my >>>> data:WARNING. The following variables had no effect on the fit: !! >> >>>> amp !! >> >>>> enot !! >> >>>> delr !! >> ss The >>>> data >>>> that I am trying to fit is the Cu metal example that come with the >>>> iffefit >>>> package. I am running Artemis on a Mac, OSX 10.4.11.I could run the >>>> fitting >>>> on a mac OSX 10.5 and it worked fine. I reinstall the IXAFS package but >>>> it >>>> didn't work.I am wondering what could be wrong with my >>>> machine/software?Thanks a lot.Juraci Sampaio >>>> _________________________________________________________________ >>>> Confira v?deos com not?cias do NY Times, gols direto do Lance, >>>> videocassetadas e muito mais no MSN Video! >>>> http://video.msn.com/?mkt=pt-br >>>>

1 0

"Hard tests failed in fovrg"
by tony vitova 30 Jan '09

30 Jan '09

Hi all, I am trying to fit Eu L3 edge EXAFS data of Eu complex whose structure is known (hopefully correct). The default feff6l in Artemis reports an error “Hard tests failed in fovrg. Muffin-tin radius may be too large; coordination number too small“. When I run feff8.2, this error exchanges with the following message “The phase shift correction is accurate to k=19”. I guess that this is not a problem, because my data is until k equal 12 A^-1. However, the fit of the first shell (9O/9N) gives Eo equal to 13, which is unrealistic. This fit with paths calculated with feff6l gives reasonable Eo value. But the phase shifts seem to be calculated incorrectly. I will be very thankful for any hint! Thanks in advance Tonya

3 2

Re: [Ifeffit] about Farrel Lytle data of Na2WO4.2H2O
by Yordy Licea Fonseca 29 Jan '09

29 Jan '09

Hi Carlo and Matt, Thank you very much for your help. Best wishes, Yordy On 29/01/2009, ifeffit-request(a)millenia.cars.aps.anl.gov < ifeffit-request(a)millenia.cars.aps.anl.gov> wrote: > > Send Ifeffit mailing list submissions to > ifeffit(a)millenia.cars.aps.anl.gov > > To subscribe or unsubscribe via the World Wide Web, visit > http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit > or, via email, send a message with subject or body 'help' to > ifeffit-request(a)millenia.cars.aps.anl.gov > > You can reach the person managing the list at > ifeffit-owner(a)millenia.cars.aps.anl.gov > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Ifeffit digest..." > > > Today's Topics: > > 1. Trouble with fitting with Artemis (Juraci A. Sampaio) > 2. Re: Trouble with fitting with Artemis (Richard Mayes) > 3. about Farrel Lytle data of Na2WO4.2H2O (Yordy Licea Fonseca) > 4. Re: about Farrel Lytle data of Na2WO4.2H2O (Matt Newville) > 5. uncertainty in linear combination analysis (Pushan Shah) > 6. Artemis parameters (abhijeet gaur) > 7. Energy shift (Eugenio Otal) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 28 Jan 2009 15:34:55 -0300 > From: "Juraci A. Sampaio" <jasampaio(a)hotmail.com> > Subject: [Ifeffit] Trouble with fitting with Artemis > To: <ifeffit(a)millenia.cars.aps.anl.gov> > Message-ID: <COL107-W60310E438349CE1C72988AACC80(a)phx.gbl> > Content-Type: text/plain; charset="iso-8859-1" > > > Hi there!I'm getting the following message when I try to fit my > data:WARNING. The following variables had no effect on the fit: !! >> > amp !! >> > enot !! >> > delr !! >> ss The data > that I am trying to fit is the Cu metal example that come with the iffefit > package. I am running Artemis on a Mac, OSX 10.4.11.I could run the fitting > on a mac OSX 10.5 and it worked fine. I reinstall the IXAFS package but it > didn't work.I am wondering what could be wrong with my > machine/software?Thanks a lot.Juraci Sampaio > _________________________________________________________________ > Confira v?deos com not?cias do NY Times, gols direto do Lance, > videocassetadas e muito mais no MSN Video! > http://video.msn.com/?mkt=pt-br >

1 0

Re: [Ifeffit] about Farrel Lytle data of Na2WO4.2H2O
by Yordy Licea Fonseca 29 Jan '09

29 Jan '09

Hi Carlo and Ma On 29/01/2009, ifeffit-request(a)millenia.cars.aps.anl.gov < ifeffit-request(a)millenia.cars.aps.anl.gov> wrote: > > Send Ifeffit mailing list submissions to > ifeffit(a)millenia.cars.aps.anl.gov > > To subscribe or unsubscribe via the World Wide Web, visit > http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit > or, via email, send a message with subject or body 'help' to > ifeffit-request(a)millenia.cars.aps.anl.gov > > You can reach the person managing the list at > ifeffit-owner(a)millenia.cars.aps.anl.gov > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Ifeffit digest..." > > > Today's Topics: > > 1. Trouble with fitting with Artemis (Juraci A. Sampaio) > 2. Re: Trouble with fitting with Artemis (Richard Mayes) > 3. about Farrel Lytle data of Na2WO4.2H2O (Yordy Licea Fonseca) > 4. Re: about Farrel Lytle data of Na2WO4.2H2O (Matt Newville) > 5. uncertainty in linear combination analysis (Pushan Shah) > 6. Artemis parameters (abhijeet gaur) > 7. Energy shift (Eugenio Otal) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 28 Jan 2009 15:34:55 -0300 > From: "Juraci A. Sampaio" <jasampaio(a)hotmail.com> > Subject: [Ifeffit] Trouble with fitting with Artemis > To: <ifeffit(a)millenia.cars.aps.anl.gov> > Message-ID: <COL107-W60310E438349CE1C72988AACC80(a)phx.gbl> > Content-Type: text/plain; charset="iso-8859-1" > > > Hi there!I'm getting the following message when I try to fit my > data:WARNING. The following variables had no effect on the fit: !! >> > amp !! >> > enot !! >> > delr !! >> ss The data > that I am trying to fit is the Cu metal example that come with the iffefit > package. I am running Artemis on a Mac, OSX 10.4.11.I could run the fitting > on a mac OSX 10.5 and it worked fine. I reinstall the IXAFS package but it > didn't work.I am wondering what could be wrong with my > machine/software?Thanks a lot.Juraci Sampaio > _________________________________________________________________ > Confira v?deos com not?cias do NY Times, gols direto do Lance, > videocassetadas e muito mais no MSN Video! > http://video.msn.com/?mkt=pt-br >

1 0

Re: [Ifeffit] Ifeffit Digest, Vol 71, Issue 32
by Juraci A. Sampaio 29 Jan '09

29 Jan '09

Hi Rich,I found out what was wrong. The extend path parameters in the paths tab was on. When I set it as off the fitting worked just fine.Thanks a lot for your help.Juraci> From: ifeffit-request(a)millenia.cars.aps.anl.gov> Subject: Ifeffit Digest, Vol 71, Issue 32> To: ifeffit(a)millenia.cars.aps.anl.gov> Date: Thu, 29 Jan 2009 07:00:40 -0600> > Send Ifeffit mailing list submissions to> ifeffit(a)millenia.cars.aps.anl.gov> > To subscribe or unsubscribe via the World Wide Web, visit> http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit> or, via email, send a message with subject or body 'help' to> ifeffit-request(a)millenia.cars.aps.anl.gov> > You can reach the person managing the list at> ifeffit-owner(a)millenia.cars.aps.anl.gov> > When replying, please edit your Subject line so it is more specific> than "Re: Contents of Ifeffit digest..."> > > Today's Topics:> > 1. Trouble with fitting with Artemis (Juraci A. Sampaio)> 2. Re: Trouble with fitting with Artemis (Richard Mayes)> 3. about Farrel Lytle data of Na2WO4.2H2O (Yordy Licea Fonseca)> 4. Re: about Farrel Lytle data of Na2WO4.2H2O (Matt Newville)> 5. uncertainty in linear combination analysis (Pushan Shah)> 6. Artemis parameters (abhijeet gaur)> 7. Energy shift (Eugenio Otal)> > > ----------------------------------------------------------------------> > Message: 1> Date: Wed, 28 Jan 2009 15:34:55 -0300> From: "Juraci A. Sampaio" <jasampaio(a)hotmail.com>> Subject: [Ifeffit] Trouble with fitting with Artemis> To: <ifeffit(a)millenia.cars.aps.anl.gov>> Message-ID: <COL107-W60310E438349CE1C72988AACC80(a)phx.gbl>> Content-Type: text/plain; charset="iso-8859-1"> > > Hi there!I'm getting the following message when I try to fit my data:WARNING. The following variables had no effect on the fit: !! >> amp !! >> enot !! >> delr !! >> ss The data that I am trying to fit is the Cu metal example that come with the iffefit package. I am running Artemis on a Mac, OSX 10.4.11.I could run the fitting on a mac OSX 10.5 and it worked fine. I reinstall the IXAFS package but it didn't work.I am wondering what could be wrong with my machine/software?Thanks a lot.Juraci Sampaio> _________________________________________________________________> Confira v?deos com not?cias do NY Times, gols direto do Lance, videocassetadas e muito mais no MSN Video!> http://video.msn.com/?mkt=pt-br> -------------- next part --------------> An HTML attachment was scrubbed...> URL: http://millenia.cars.aps.anl.gov/pipermail/ifeffit/attachments/20090128/eb8… > > ------------------------------> > Message: 2> Date: Wed, 28 Jan 2009 14:29:58 -0500> From: Richard Mayes <rtmayes(a)gmail.com>> Subject: Re: [Ifeffit] Trouble with fitting with Artemis> To: XAFS Analysis using Ifeffit <ifeffit(a)millenia.cars.aps.anl.gov>> Message-ID:> <5a2a54820901281129n2b0d8fc4ib02a2ed2faeca8c5(a)mail.gmail.com>> Content-Type: text/plain; charset="iso-8859-1"> > Juraci,> > Can you please attach a project file so we can look at it and try to find> the problem. My first guess would be the parameters are not defined in the> "guess,def,set" page like they are in the path list but without seeing the> project file, it's hard to be specific.> > -Rich> > On Wed, Jan 28, 2009 at 1:34 PM, Juraci A. Sampaio <jasampaio(a)hotmail.com>wrote:> >> Hi there!>>>> I'm getting the following message when I try to fit my data:>> WARNING. The following variables had no effect on the fit:>> !! >> amp>> !! >> enot>> !! >> delr>> !! >> ss>>>> The data that I am trying to fit is the Cu metal example that come with the>> iffefit package. I am running Artemis on a Mac, OSX 10.4.11.>> I could run the fitting on a mac OSX 10.5 and it worked fine. I reinstall>> the IXAFS package but it didn't work.>>>> I am wondering what could be wrong with my machine/software?>>>> Thanks a lot.>>>>>> Juraci Sampaio>>>>>> ------------------------------>> Not?cias direto do New York Times, gols do Lance, videocassetadas e muitos>> outros v?deos no MSN Videos! Confira j?! <http://video.msn.com/?mkt=pt-br>>>>> _______________________________________________>> Ifeffit mailing list>> Ifeffit(a)millenia.cars.aps.anl.gov>> http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit>>>>> -------------- next part --------------> An HTML attachment was scrubbed...> URL: http://millenia.cars.aps.anl.gov/pipermail/ifeffit/attachments/20090128/7f5… > > ------------------------------> > Message: 3> Date: Wed, 28 Jan 2009 18:18:00 -0200> From: Yordy Licea Fonseca <yliceafonseca(a)gmail.com>> Subject: [Ifeffit] about Farrel Lytle data of Na2WO4.2H2O> To: ifeffit(a)millenia.cars.aps.anl.gov> Message-ID:> <6bc7d27d0901281218t6eac4721o1922c155b95a1087(a)mail.gmail.com>> Content-Type: text/plain; charset="iso-8859-1"> > Hi,> > Sorry, I could not find enough information.> Would any of you tell me, please, how is the EXAFS data tabulated in Farrel> Lytle data base?> The first column is the energy, what about others?> I would like to obtain the absorption coefficient vs energy from this> file:> > http://ixs.csrri.iit.edu/data/Farrel_Lytle_data/RAW/W/wna.095> > Best wishes,> > -- > Yordy E. Licea Fonseca> Departamento de F?sico-Qu?mica> Instituto de Qu?mica-IQ/UFRJ> Laborat?rio de Cat?lise Heterog?nea> Rio de Janeiro, RJ, CEP 21.949-909> Brasil> Email: yliceafonseca(a)gmail.com> -------------- next part --------------> An HTML attachment was scrubbed...> URL: http://millenia.cars.aps.anl.gov/pipermail/ifeffit/attachments/20090128/cea… > > ------------------------------> > Message: 4> Date: Wed, 28 Jan 2009 14:24:22 -0600> From: Matt Newville <newville(a)cars.uchicago.edu>> Subject: Re: [Ifeffit] about Farrel Lytle data of Na2WO4.2H2O> To: XAFS Analysis using Ifeffit <ifeffit(a)millenia.cars.aps.anl.gov>> Message-ID:> <b8522e3d0901281224v42f22a8cs6489a5792c4588f0(a)mail.gmail.com>> Content-Type: text/plain; charset=ISO-8859-1> > Hi Yordy,> > The first column for that file is not energy, it is angular steps. See> http://cars9.uchicago.edu/ifeffit/FAQ/Data_Handling#head-e7e2389af58d378379…> > and the other posts from earlier today for how to convert this data into mu(E).> > --Matt> > On Wed, Jan 28, 2009 at 2:18 PM, Yordy Licea Fonseca> <yliceafonseca(a)gmail.com> wrote:>> Hi,>>>> Sorry, I could not find enough information.>> Would any of you tell me, please, how is the EXAFS data tabulated in Farrel>> Lytle data base?>> The first column is the energy, what about others?>> I would like to obtain the absorption coefficient vs energy from this>> file:>>>> http://ixs.csrri.iit.edu/data/Farrel_Lytle_data/RAW/W/wna.095>>>> Best wishes,>>>> -->> Yordy E. Licea Fonseca>> Departamento de F?sico-Qu?mica>> Instituto de Qu?mica-IQ/UFRJ>> Laborat?rio de Cat?lise Heterog?nea>> Rio de Janeiro, RJ, CEP 21.949-909>> Brasil>> Email: yliceafonseca(a)gmail.com>>>> _______________________________________________>> Ifeffit mailing list>> Ifeffit(a)millenia.cars.aps.anl.gov>> http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit>>>>> > > > ------------------------------> > Message: 5> Date: Thu, 29 Jan 2009 13:33:08 +1100> From: "Pushan Shah" <pshah(a)gse.mq.edu.au>> Subject: [Ifeffit] uncertainty in linear combination analysis> To: <ifeffit(a)millenia.cars.aps.anl.gov>> Message-ID: <4981B014.0BBD.0060.0(a)gse.mq.edu.au>> Content-Type: text/plain; charset=US-ASCII> > Hello Everyone!> > How can I estimate an uncertainty in linear combination analysis and calculate them in percentage error?> > Many thanks,> Pushan> > > > > > > ------------------------------> > Message: 6> Date: Thu, 29 Jan 2009 15:41:55 +0530> From: abhijeet gaur <abhijeetgaur9(a)gmail.com>> Subject: [Ifeffit] Artemis parameters> To: ifeffit(a)millenia.cars.aps.anl.gov> Message-ID:> <862a39070901290211s6a928d40yc902a09ff532f2a9(a)mail.gmail.com>> Content-Type: text/plain; charset="iso-8859-1"> > Hi> I am fitting a copper foil whose data is taken at room temperature. So> do I need to change the guess value of parameters enot, ss,amp, delr to some> other value or I should take them as the default guess value. Also what> should be the ideal fitting range in R for the copper foil.> > > With thanks> > Abhijeet> -------------- next part --------------> An HTML attachment was scrubbed...> URL: http://millenia.cars.aps.anl.gov/pipermail/ifeffit/attachments/20090129/bd2… > > ------------------------------> > Message: 7> Date: Thu, 29 Jan 2009 11:00:32 -0200> From: Eugenio Otal <eugenioh(a)gmail.com>> Subject: [Ifeffit] Energy shift> To: ifeffit(a)millenia.cars.aps.anl.gov> Message-ID:> <da22ad30901290500s14de8d2dy4cbaf8ec693e6796(a)mail.gmail.com>> Content-Type: text/plain; charset="iso-8859-1"> > Hi Matt,> Thanks for your time, the shift is between calculated and experiment. I> attach two figures with and without correction, it matchs really good if I> change 5.5eV the energy.> Thanks, euG> -------------- next part --------------> An HTML attachment was scrubbed...> URL: http://millenia.cars.aps.anl.gov/pipermail/ifeffit/attachments/20090129/a2f… > -------------- next part --------------> A non-text attachment was scrubbed...> Name: without energy shift.jpg> Type: image/jpeg> Size: 58982 bytes> Desc: not available> Url : http://millenia.cars.aps.anl.gov/pipermail/ifeffit/attachments/20090129/a2f… > -------------- next part --------------> A non-text attachment was scrubbed...> Name: energy shift.jpg> Type: image/jpeg> Size: 69194 bytes> Desc: not available> Url : http://millenia.cars.aps.anl.gov/pipermail/ifeffit/attachments/20090129/a2f… > > ------------------------------> > _______________________________________________> Ifeffit mailing list> Ifeffit(a)millenia.cars.aps.anl.gov> http://millenia.cars.aps.anl.gov/mailman/listinfo/ifeffit> > > End of Ifeffit Digest, Vol 71, Issue 32> *************************************** _________________________________________________________________ Cansado de espaço para só 50 fotos? Conheça o Spaces, o site de relacionamentos com até 6,000 fotos! http://www.amigosdomessenger.com.br

1 0

Energy shift
by Eugenio Otal 29 Jan '09

29 Jan '09

Hi Matt, Thanks for your time, the shift is between calculated and experiment. I attach two figures with and without correction, it matchs really good if I change 5.5eV the energy. Thanks, euG

2 1

Artemis parameters
by abhijeet gaur 29 Jan '09

29 Jan '09

Hi I am fitting a copper foil whose data is taken at room temperature. So do I need to change the guess value of parameters enot, ss,amp, delr to some other value or I should take them as the default guess value. Also what should be the ideal fitting range in R for the copper foil. With thanks Abhijeet

2 1

uncertainty in linear combination analysis
by Pushan Shah 28 Jan '09

28 Jan '09

Hello Everyone! How can I estimate an uncertainty in linear combination analysis and calculate them in percentage error? Many thanks, Pushan

1 0