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PeakFit 4.12
 
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PeakFit 4.12
The automatic choice for spectroscopy, chromatography or electrophoresis

For most data sets, PeakFit does the work for you. What once took hours now takes minutes – with only a few mouse clicks! If you have extremely complex or noisy data sets, the sophistication and depth of PeakFit’s data handling techniques is unequalled. PeakFit offers state of the art nonlinear curve fitting. It helps you separate overlapping peaks by statistically fitting numerous peak functions to one data set, which help you find even the most obscure patterns in your data. Nonlinear curve fitting is essential for accurate peak analysis and accurate research. The sophisticated data handling in PeakFit further expands your possibilities. The visual FFT filter-smoothing technique in PeakFit allows for superb noise reduction while maintaining the integrity of the original data stream. PeakFit's non-parametric baseline fitting routine easily removes complex backgrounds in e.g. DNA electrophoresis samples. Only PeakFit offers so many different methods of data handling. If PeakFit's auto-placement features fail on extremely complicated or noisy data, you can place and fit peaks graphically with only a few mouse clicks.
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General features in PeakFit 4.12

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

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, de-selection.
  • 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, Centre, or Area).

NUMERICAL REVIEW

  • Peak Characterization data: Centre, 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.

Read more about PeakFit 4.12 here:
http://www.sigmaplot.com/products/PeakFit/

Detailed information about PeakFit

PeakFit 4.12 Brochure:

PeakFit 4.12 Product page

System requirements
Windows 95, 98, 2000, NT and XP
486 Processor or higher
16 MB RAM (32 Mb Ram recommended)
10 MB available Hard disk space
CD-ROM
SVGA/256 color graphics adapter (800 x 600, High Color recommended)

PeakFit license options:

  • Single user
  • Concurrent (SIMUS) network
  • Volume licenses
  • Site licenses

Perpetual with maintenance or annual (lease) licenses for all licenseoptions.

Please call for an offer today!

PeakFit Demo

Download fully functional 30-day trial software of PeakFit 4.12.

Once the file is downloaded, double click on the file to start the installation process.

File size: 9,5 MB

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Support and Resources for PeakFit

We provide technical support for all our customers of PeakFit. Use the Contact us in the menu (panel to the left), or send an email to support@alfasoft.se. You can also call us at +46 (0) 31 - 60 43 80 to talk to one of our support assistants.

When contacting our support department please describe your problem as detailed as possible. Remember to always inform about the productversion and what operating system you are using (platform and version).

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