Hi Olena, I don't think there is an easy way to do this in Artemis. It is possible with Larch and Larix, as each Parameter can have min/max bounds placed on it. On Thu, Feb 6, 2025 at 7:11 AM Olena Zavorotynska via Ifeffit < ifeffit@millenia.cars.aps.anl.gov> wrote:

Hello, I have been fitting in Artemis three phases to my samples, that I denote x, y, and 1-(x+y). It often happens that x and y get unreasonable or negative values. How do I constrain x, y to be positive, and x+y < 1? On a side note, I have ZjQcmQRYFpfptBannerStart This Message Is From an External Sender This message came from outside your organization.

ZjQcmQRYFpfptBannerEnd Hello,

I have been fitting in Artemis three phases to my samples, that I denote x, y, and 1-(x+y). It often happens that x and y get unreasonable or negative values. How do I constrain x, y to be positive, and x+y < 1?

On a side note, I have simple metallic lattices, and fitting two samples at the same time so have enough independent points.

Best regards Olena Zavorotynska

Sent from my Galaxy

ifeffit mailing list: https://millenia.cars.aps.anl.gov/mailman3/lists/ifeffit.millenia.cars.aps.a... to unsubscribe, send mail to ifeffit-leave@millenia.cars.aps.anl.gov

-- --Matt Newville <newville at cars.uchicago.edu> 630-327-7411