Softpedia >Windows >Others >Home & Education >FindGraph >  Changelog

FindGraph Changelog

What's new in FindGraph 2.622

Aug 14, 2019
  • Custom work

New in FindGraph 2.611 (Nov 1, 2015)

  • Include clasterization, and logistic regression.

New in FindGraph 2.601 (Aug 18, 2015)

  • Signal segmentation
  • The Akima interpolation, built from piecewise third order polynomials.
  • Add several special functions:
  • Exponential integrals: Ei(x) 'expintegrali', En(x,n) 'expintegraln'
  • Complete Elliptic integrals: K(x) 'ellintegralk', E(x) 'ellintegrale'
  • Fresnel integrals: C(x) 'fresnelintegralc', S(x) 'fresnelintegrals'
  • Trigonometric integrals: Ci(x) 'trigintegralci', Si(x) 'trigintegralsi'
  • Bug fixed:
  • When Spline/Bezier interopolation, boundary points sometimes were missed.

New in FindGraph 2.591 (Jun 10, 2015)

  • Feature to find best fit with conditions (for example, second derivative is positive in all dataset).
  • Important: we do not check conditions when find best parameters for function, but when we sort functions in 'best fit list', we penalize functions that do not satisfy conditions. So only functions with conditions are on top.
  • Bug fixed: when find best fit, first function was missed in FitLogWindow.

New in FindGraph 2.57 (Jun 10, 2015)

  • Feature to find the decision boundary in logistic regression classification to divide dataset based on logistic regression function.
  • Clasterization: we define Z value for each point in dataset based on Logistic Regression or K-Means to place data items into groups.

New in FindGraph 2.56 (Jun 10, 2015)

  • Feature to apply regularization (Forward Stagewise Linear Regression algorithm) to prevent overfitting.

New in FindGraph 2.552 (Nov 11, 2014)

  • Epanechnikov quadratic kernel smoother
  • Feature to apply boosting (a weighted average of predictions of individual regression lines) in linear regression to decrease overfitting
  • Bug in Gaussian smoother parameters (apply both width and maximum number of nearest points)

New in FindGraph 2.541 (Nov 11, 2014)

  • Image filter to exclude pixels with low brightness gradient.
  • In Singular Spectrum Analysis (SSA), when M selected, broken stick model is used to estimate the eigenvectors count to find and include only best components.
  • SSA optimization.

New in FindGraph 2.521 (May 14, 2014)

  • Add several user models.
  • Memleaks bug fixed.
  • Optimization

New in FindGraph 2.511 (Feb 5, 2014)

  • Modeling baseline by the Shirley algorithm
  • Image filter to exclude pixels with low brightness gradient.
  • Add smoothing image filter.
  • Apply a 5x5 Gaussian filter when smooth image
  • Sort optimization: main effect in smooth and random data generations.

New in FindGraph 2.501 (Sep 19, 2013)

  • Feature to add nearest points between points added manually when digitize 'by hand'
  • Image filter to exclude pixels with low brightness gradient.
  • Add smoothing image filter.
  • Image black/white filter based on adaptive thresholding (Bradley and Roth) technique.
  • The image is converted to black and white based on adaptive thresholding (Bradley and Roth) technique.
  • Vary 'Quantize' value to change brightness level.
  • In Singular Spectrum Analysis (SSA), when M selected, broken stick model is used to estimate the eigenvectors count to include best components.
  • Feature to find all local minimum to define baseline and to subtract it.
  • Add several functions in calculator.
  • bug fixed when digitize by hand, see ~CDigColoPage()
  • bug fixed when read strings from Clipboard

New in FindGraph 2.493 (Jul 17, 2013)

  • Feature to apply the empirical mode decomposition (EMD) algorithm, apply EMD to exclude several components to smooth data.
  • Bug fixed: plot list was empty when open new fgr.
  • Bug fixed: crush when find peaks and close dialog.

New in FindGraph 2.481 (May 21, 2013)

  • Feature to apply chaotic maps to generate time series in the form of iterated functions (the Logistic map, Gauss iterated map, Tent map, Standard circle map).
  • Bug fixed: plot list was empty when open new fgr.
  • Bug fixed when add random data series.

New in FindGraph 2.472 (Feb 25, 2013)

  • Select best fit function based on: minimum Std. Error, or maximum adjasted R-square value, or minimum BDS Test value, or minimum BIC (Bayesian information criterion) value.
  • Feature to exclude outliers.

New in FindGraph 2.462 (Feb 25, 2013)

  • Feature to apply a radial basis function network in function approximations, and time series predictions.

New in FindGraph 2.452 (Feb 5, 2013)

  • Unbend' image transformation was added. We apply this transformation when digitize curved images to get rectangular grid.
  • When digitize data by hand, use key 'Insert' or key 'I' to add point, and key 'Delete'or key 'D' to remove point.

New in FindGraph 2.441 (Oct 9, 2012)

  • Bug fixed when automation B-spline function, update VB automation samples.
  • Bug fixed when digitizing fat chart lines.

New in FindGraph 2.431 (Aug 16, 2012)

  • Feature to use not orthogonally positioned calibration points when digitizing.
  • Bug fixed when digitizing fat chart lines.

New in FindGraph 2.422 (Jul 10, 2012)

  • Feature to apply RNN (Recurrent Neural Network) with 2 hidden layers to find best fit and to forecast next data values.

New in FindGraph 2.411 (May 18, 2012)

  • Feature to apply the Douglas-Peucker algorithm for reducing the number of points.
  • Feature to apply the empirical mode decomposition (EMD) algorithm, and exclude M components.

New in FindGraph 2.394 (May 18, 2012)

  • Bug fixed: zoom in selected area

New in FindGraph 2.393 (Mar 14, 2012)

  • Add feature to brush all points with same Z values as in selected area.
  • Add feature to highlight and to select interactively the corrispondent data points on the others dataset, to explore the relationship of the two measures represented by X-Y plot in relation to the distribution of a third (Z) measure.
  • Bug fixed: was missed the feature to vary the thickness of area contour lines

New in FindGraph 2.381 (Feb 7, 2012)

  • BDS test (Brock-Dechert-Scheinkman) applied to residuals when fit data, apply ARIMA, SSA, and GMDH.
  • A test for independence (Brock-Dechert-Scheinkman) based on the correlation dimension, applied to residuals.
  • If resulting C2 value greater 3, the null hypotheses of no dependence are rejected asymptotically.
  • When select fit model, try to minimize C2 value.
  • Add feature to find best fit based on BDS test C2 value.

New in FindGraph 2.37 (Feb 7, 2012)

  • When fit peaks, find total peak area (the area between the curve and the baseline)
  • Add automation method to extract cyclic based on formula.
  • Bug fixed: when extract cyclic it find fit only in window but not in all data points.

New in FindGraph 2.35 (Feb 7, 2012)

  • Feature to estimate Correlation dimension (fraction of pairs of points with distance gt eps)
  • Add several functions (Bessel, erfc) to calculator
  • Find and copy distribution to Clipboard.
  • Automation methods changes (add fft/wavelet filtering).
  • Bug fixed when read csv file.
  • Bug fixed: when extract cyclic it find fit only in window but not in all data points.

New in FindGraph 2.332 (Jun 13, 2011)

  • Add several (21) peak and distribution functions.

New in FindGraph 2.332 (Jun 13, 2011)

  • Add several (21) peak and distribution functions.

New in FindGraph 2.311 (Mar 18, 2011)

  • Feature to present data as date-time format when export data to text file.
  • Add Log Normal Shifted distibution.

New in FindGraph 2.301 (Mar 18, 2011)

  • Keep program settings (in MyDocuments).
  • Bug fixed: y-scale when great range was hidden.

New in FindGraph 2.291 (Dec 7, 2010)

  • 3-parameters GammaPDF.
  • Add several user models.
  • Add automation methods to work with parametric curves.

New in FindGraph 2.281 (Oct 28, 2010)

  • Gagnon-Harper chart diagram.
  • Add feature to fit scale to ranges.

New in FindGraph 2.271 (Oct 27, 2010)

  • Bug fixed: paint curves out of plot area.

New in FindGraph 2.261 (Aug 20, 2010)

  • When find nonlinear fit, apply least squares or minimize abs. deviations or apply robust fitting.
  • Bug in context help fixed.

New in FindGraph 2.251 (Aug 20, 2010)

  • Add up to 9 parameters in nonlinear fit automation (was limited to 5).
  • Include Excel examples how to call automation methods.
  • Change RFTR (Procrust analysis) algorithm.
  • Help system was updated

New in FindGraph 2.241 (Jul 6, 2010)

  • Add up to 9 parameters in nonlinear fit automation (was limited to 5).
  • Include Excel examples how to call automation methods.
  • Help system was updated.

New in FindGraph 2.220 (May 14, 2010)

  • Add Resistant Fit Theta Rho in Procrustes analysis.
  • Apply GMDH Polynomial Neural Network to fit and to forecast data series.

New in FindGraph 2.211 (Apr 16, 2010)

  • In group 'power' add Gamma probability density function .
  • Add feature to exclude out of range points in Prune dialog.
  • Add feature to estimate derivatives for parametric curves in function trace dilaog .
  • Add automation methods to simplify export to Excel and work with parametric curves.
  • Add automation methods to smooth data, apply SSA, ARIMA, ExtractCyclic.
  • Include Excel examples how to call automation methods.

New in FindGraph 2.183 (Apr 16, 2010)

  • Iteratively reweighted Procrustes analysis.
  • Add several models to nonlinear fitting group 'rationals'.
  • Add gamma models to nonlinear fitting group 'power'.
  • Bug fixed: when log scale, range was limited 1.e-8, 1.e8.
  • Bug fixed when fit ranges for all data.
  • Bug fixed: crush when apply Procrust to data with different size.

New in FindGraph 2.162 (Feb 1, 2010)

  • Approximate data with an Ellipse (prmt.dll)

New in FindGraph 2.131 (Nov 10, 2009)

  • Compare two data series
  • Command line support in form: Findgraph test.jpg or Findgraph test.txt
  • Bug fixed when show tooltips.
  • Bug fixed when find best fit with parameters and compose output string.

New in FindGraph 2.121 (Sep 16, 2009)

  • Samples browser changes.
  • Help update.
  • Bug fixed: crush when find peaks and close dialog.

New in FindGraph 2.111 (Jul 20, 2009)

  • Fits an autoregressive integrated moving average (ARIMA) model, apply to forecast next point.
  • Bug fixed: paint points with negative values when log scale.
  • Bug fixed: error when create residuals plot.
  • Bug fixed: crush when find peaks and close dialog.

New in FindGraph 2.05 (Jun 3, 2009)

  • Add cosine models.
  • Bug fixed: crush when find peaks and no points were selected.

New in FindGraph 2.04 (May 22, 2009)

  • Feature to average several data series to get one
  • Feature to estimate a local x-dependent Lyapunov exponent
  • Feature to generate random numbers with distribution you select

New in FindGraph 2.021 (May 5, 2009)

  • Feature to estimate a local x-dependent Lyapunov exponent.
  • Feature to generate random numbers with distribution you select.
  • Bug was fixed: low/high-labels in the filter dialog were mixed.

New in FindGraph 2.011 (Feb 6, 2009)

  • Recurrence plot (correlation Y1(x) vs Y2(x+t)) on graph border.
  • Transformations: Log-return and Percentage-return.
  • Feature to estimate a local x-dependent Hurst exponent H(x).
  • Bug was fixed 'wrong step to scroll when trace function.'

New in FindGraph 2.006 Beta (Jan 8, 2009)

  • Feature to input axis X range instead start and scale.
  • Feature to show separate peaks when find peaks.
  • Bug was fixed 'Paint border when save as bitmap'
  • Bug was fixed 'Paint error bars'
  • Bug was fixed 'Legend when paint OLE object'

New in FindGraph 1.960 (Oct 4, 2008)

  • Feature to fix any parameter when find curve fit.
  • Feature to link background image to the zooming and translation of the curve.

New in FindGraph 1.950 (Jul 24, 2008)

  • Feature to show colormaps and contour lines (izolines by z value).
  • Feature to show points with color (radiur) set by parameter Z (x,y,z).
  • Show Voronoi diagram with color defined by parameter Z.
  • Bug fixed when plot pentagon, rhombus.

New in FindGraph 1.942 (Jul 22, 2008)

  • Include Rational model for simple curve analysis.

New in FindGraph 1.942 (Jul 4, 2008)

  • Include Rational model for simple curve analysis.

New in FindGraph 1.931 (May 27, 2008)

  • Charting: moving average with bands.
  • Layers to show/hide all graphs with color selected.
  • Local regression smoothing (Lowess).
  • Detailed regression results when find curve fit (SSE, R-square, Adjusted R-square, Fit standard error,F-statistics, Confidence bounds for coefficients, plot with prediction bounds for function and for observations).
  • DateTime format support when read date-time data from text file.
  • When find fit (and best fit) show 'Fit Standard Error' instead 'Standard Error of Estimation'
  • Bug fixed: in Procrustes analysis when assigned weight.
  • Bug fixed: there was error when read integer values delimited by comma.

New in FindGraph 1.910 (Mar 3, 2008)

  • Formulas: ChiSquareDistribution, NormalDistribution, TDistribution, InverseNormalDistribution
  • When extract cyclic, change the number of harmonics to find up to 20.
  • Add peak functions: Pearson, AsymPearson, Doniach-Sunjic
  • Add robust fitting in linear regression.
  • Bug fixed: if edit existing formula and then click cancel, the formula was deleted
  • Bug fixed: paint log scale grid.

New in FindGraph 1.892 (Feb 11, 2008)

  • Add in log file: R-square, R-square adjasted, F statistic
  • Add 'User model' 'Inverse' y = a / (x^c - 1) b
  • Bug in LevenbergMarquardt fixed
  • Bug fixed: averaging of two functions sometimes crashes FindGraph.
  • Bug fixed: when find best fit, incorrect compare with NaN.
  • In nolinear fit and in find peaks set LevenbergMarquardt by default (was Simplex)

New in FindGraph 1.870 (Sep 18, 2007)

  • Feature to add labels with one click.

New in FindGraph 1.850 (Jul 18, 2007)

  • Feature to add label Y with one click.
  • Show all peaks on chart.

New in FindGraph 1.821 (Jun 19, 2007)

  • High-Low-Open-Close, Candle diagrams
  • In dialog add feature to save FFT (wavelet) transformed data.

New in FindGraph 1.810 (May 25, 2007)

  • Pie-Chart, Stack column, Floating Column, High-Low-Close diagram
  • bug fixed: when nonlinear fit, wrong XY ranges on step 1
  • Vista compatible

New in FindGraph 1.73 (Dec 6, 2006)

  • Redesigned interface and various plotting enhancements

New in FindGraph 1.70 (Sep 15, 2006)

  • Redesigned interface and various plotting enhancements