QUOTES About PeakFit

• "We know of no other comparable program that offers such sophisticated data analysis..." -- Journal of the American Chemical Society,Vol. 114, No. 20

• "PeakFit has been a big time saver. I wish I had found this product years ago." -- John Spradling Communications Engineer

• "PeakFit is extremely powerful and has all the features I need. It is especially adept at finding hidden peaks...with almost no effort on my part!" -- Margaret B. Aydelotte, Ph.D. Rush Medical College

PEAK FITTING Built-In Nonlinear Functions (83 total)

• Spectroscopy (18): Gauss Amp, Gauss Area, Lorentz Amp, Lorentz Area, Voigt Amp, Voigt Area, Voigt Amp Approx, Voigt Amp G/L, Voigt Area G/l, Gauss Cnstr Amp, Gauss Cnstr Area, Pearson VII Amp, Pearson VII Area, Gauss+Lor Area, Gauss*Lor, Gamma Ray, Compton Edge.

• Chromatography (8): HVL, NLC, Giddings, EMG, GMG, EMG+GMG, GEMG, GEMG 5-parm.

• Statistical (31): Log Normal Amp, Log Normal Area, Logistic Amp, Logistic Area, Laplace Amp, Laplace Area, Extr Value Amp, Extr Value Area, Log Normal-4 Amp, Log Normal-4 Area, Eval4 Amp Tailed, Eval4 Area Tailed, Eval4 Amp Frtd, Eval4 Area Frtd, Gamma Amp, Gamma Area, Inv Gamma Amp, Inv Gamma Area, Weibull Amp, Weibull Area, Error Amp, Error Area, Chi-Sq Amp, Chi-Sq Area, Student t Amp, Student t Area, Beta Amp, Beta Area, F Variance Amp, F Variance Area, Pearson IV.

• General Peak (12): Erfc Pk, Pulse Pk, LDR Pk, Asym Lgstc Pk, Lgstc pow Pk, Pulse pow Pk, Pulse Wid2 Pk, Intermediate Pk, Sym Dbl Sigmoid, Sym Dbl GaussCum, Asym Dbl Sigmoid, Asym Dbl GaussCum.

• Transition (14): Sigmoid Asc, Sigmoid Desc, GaussCum Asc, GaussCum Desc, LorentzCum Asc, LorentzCum Desc, LgstcDose Rsp Asc, LgstcDoseRsp Desc, LogNormCum Asc, LogNormCum Desc, ExtrValCum Asc, ExtrValCum Desc, PulseCum Asc, PulseCum Desc.

User Defined Functions

• Up to 10 Parameters per function.

• Up to 15 UDF's active during fit.
• Estimates can contain formulas and constraints.
• Extensive mathematical, statistical, Bessel, and logic functions.

Baseline Fit and Subtract

• Automatic detection of baseline points by constant second derivatives.
• Real-time Fitting in conjunction with data point selection, deselection.
• Background Functions (10): Constant, Linear, Progressive Linear, Quadratic, Cubic, Logarithmic, Exponential, Power, Hyperbolic and Non-Parametric.

Graphical Review

• Component and Sum Curve graphs.
• Residuals Graphs, including Distribution and Stabilized Normal Probability Plots.
• Confidence and Prediction Intervals.
• Peak Labels (Amplitude, Center, or Area).

Numerical Review

• Peak Characterization data: Center, Amplitude, Integrated Area, Analytical Area, FWHM, FW10, FWBASE, Asymmetry at HM, Asymmetry at 10 percent, First and Second Moments, Column Efficiency and Resolution, Percentage Areas, Overlap Areas.

• Parameter Statistics: Parameter Values, Confidence Limits (90, 95, 99 percent), t-values, Standard Errors.

• Fit Statistics: Analysis of Variance, F-statistic, Overall Standard Error, r2 value.

• Data Statistics: Residual Values, Predicted Y-values, Confidence/Prediction Intervals.

谢谢～～

用用看～～

GENERAL FEATURES

Data Input

• ASCII
• Excel^®
• Lotus 123^®
• Quattro Pro^® Windows^®
• SigmaPlot^®
• AIA Chromatography
• dBase^® III+, IV
• DIF
• ASCII and Spreadsheet - like Editors
• Averaging Digital Filter

Data Preparation

• Gaussian Deconvolution to remove Spectrophotometer Instrument Response smearing
• Exponential Deconvolution to remove Chromatographic Detector Response smearing
• Smoothing (Savitsky Golay, FFT Filter, Loess, Gaussian Convolution)
• Real - time FFT/Time Domain Graphical Editor
• Dual Graph Data Sectioning with Graphical data point exclusion
• Non - Parametric Digital Filter to Filter or augment data
• Compare with Reference
• Subtract Baseline Imported from File
• Data Transforms
• Area Normalization
• Inspect Second and Fourth Derivatives
• Data Weighting

Peak Autoplacement

• Automatic by Local Maxima and Residuals
• Automatic by Second Derivatives
• Automatic by Deconvolved Local Maxima
• Graphical Placement and Adjustments
• Manual Parameter Adjustments
• Share and Lock Parameters
• Constant or Variable Widths and/or Shape in a single step

Non - Linear Curve Fitting

• Marquardt - Levenburg Algorithm
• Least - Squares and 3 Robust (Maximum Likelihood) methods
• Up to 100 Peaks and 1000 Parameters
• Intelligent Constraints to insure Fit Integrity
• Sparse Curvature Matrix for Faster Fitting
• Both Numeric and Graphical Fitting Options
• Zoom - in or Toggle Points during Fitting

Output and Export Options

• File Export with full Generated Data: Lotus 123, Excel, Quattro Pro Windows, SigmaPlot, and ASCII.
• Graphs to clipboard or file in BMP or WMF formats
• All Numeric data in Graph to Clipboard in Spreadsheet Format

PEAK FITTING Built-In Nonlinear Functions (83 total)

• Spectroscopy (18): Gauss Amp, Gauss Area, Lorentz Amp, Lorentz Area, Voigt Amp, Voigt Area, Voigt Amp Approx, Voigt Amp G/L, Voigt Area G/l, Gauss Cnstr Amp, Gauss Cnstr Area, Pearson VII Amp, Pearson VII Area, Gauss+Lor Area, Gauss*Lor, Gamma Ray, Compton Edge.

• Chromatography (8): HVL, NLC, Giddings, EMG, GMG, EMG+GMG, GEMG, GEMG 5-parm.

• Statistical (31): Log Normal Amp, Log Normal Area, Logistic Amp, Logistic Area, Laplace Amp, Laplace Area, Extr Value Amp, Extr Value Area, Log Normal-4 Amp, Log Normal-4 Area, Eval4 Amp Tailed, Eval4 Area Tailed, Eval4 Amp Frtd, Eval4 Area Frtd, Gamma Amp, Gamma Area, Inv Gamma Amp, Inv Gamma Area, Weibull Amp, Weibull Area, Error Amp, Error Area, Chi-Sq Amp, Chi-Sq Area, Student t Amp, Student t Area, Beta Amp, Beta Area, F Variance Amp, F Variance Area, Pearson IV.

• General Peak (12): Erfc Pk, Pulse Pk, LDR Pk, Asym Lgstc Pk, Lgstc pow Pk, Pulse pow Pk, Pulse Wid2 Pk, Intermediate Pk, Sym Dbl Sigmoid, Sym Dbl GaussCum, Asym Dbl Sigmoid, Asym Dbl GaussCum.

• Transition (14): Sigmoid Asc, Sigmoid Desc, GaussCum Asc, GaussCum Desc, LorentzCum Asc, LorentzCum Desc, LgstcDose Rsp Asc, LgstcDoseRsp Desc, LogNormCum Asc, LogNormCum Desc, ExtrValCum Asc, ExtrValCum Desc, PulseCum Asc, PulseCum Desc.

User Defined Functions

• Up to 10 Parameters per function.

• Up to 15 UDF's active during fit.
• Estimates can contain formulas and constraints.
• Extensive mathematical, statistical, Bessel, and logic functions.

Baseline Fit and Subtract

• Automatic detection of baseline points by constant second derivatives.
• Real-time Fitting in conjunction with data point selection, deselection.
• Background Functions (10): Constant, Linear, Progressive Linear, Quadratic, Cubic, Logarithmic, Exponential, Power, Hyperbolic and Non-Parametric.

Graphical Review

• Component and Sum Curve graphs.
• Residuals Graphs, including Distribution and Stabilized Normal Probability Plots.
• Confidence and Prediction Intervals.
• Peak Labels (Amplitude, Center, or Area).

Numerical Review

• Peak Characterization data: Center, Amplitude, Integrated Area, Analytical Area, FWHM, FW10, FWBASE, Asymmetry at HM, Asymmetry at 10 percent, First and Second Moments, Column Efficiency and Resolution, Percentage Areas, Overlap Areas.

• Parameter Statistics: Parameter Values, Confidence Limits (90, 95, 99 percent), t-values, Standard Errors.

• Fit Statistics: Analysis of Variance, F-statistic, Overall Standard Error, r2 value.

• Data Statistics: Residual Values, Predicted Y-values, Confidence/Prediction Intervals.