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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Anti-Spam Code: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by badan[/i] [br]Origin Ver. and Service Release (Select Help-->About Origin): OriginPro 2020b (64-bit) 9.7.5.184 (Academic) Operating System: Windows 10 64 bit Why is FWHM now not shown in the basic Gauss fit output table? (Nonlinear Curve fit - Origin basic functions - Gauss) The output table looks as follows: Model Gauss Equation y=y0 + (A/(w*sqrt(pi/2)))*exp(-2*((x-xc)/w)^2) Plot C y0 -591.52717 ± 843.41201 xc 8.50701 ± 0.00413 w 0.19831 ± 0.01133 A 6723.85162 ± 493.53314 Reduced Chi-Sqr 2349627.00072 R-Square (COD) 0.98127 Adj. R-Square 0.97565 But in the "derived parameters" of the function we have: sigma = w/2; // sigma. FWHM = sqrt(2*ln(2)) * w; // Full Width at Half Maximum. Height = A/(w*sqrt(pi/2)); // Height of the Peak. Instead of these parameters (sigma, FWHM and Height): Reduced Chi-Sqr 2349627.00072 R-Square (COD) 0.98127 Adj. R-Square 0.97565 are reported. This is not consistent with the function description and was changed comparing to Origin 8.0 [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.