As of Version 7.0, HistogramScale has been superseded by an optional argument hspec for the built-in Mathematica function Histogram.
As of Version 6.0, GraphicsSpacing has been superseded by the general option Spacings for GraphicsGrid and related functions.
Some of the functionality of the World Plotting Package is now available in CountryData.
As of Version 7.0, PolyaFieldPlot has been superseded by VectorPlot.
As of Version 7.0, PercentileBarChart has been superseded by BarChart.
The built-in function Fit finds a least-squares fit to a list of data as a linear combination of the specified basis functions. The functions Regress and DesignedRegress ...
As of Version 8, MultivariateTDistribution is part of the built-in Mathematica kernel.
As of Version 8, PrincipalComponents is part of the built-in Mathematica kernel.
The built-in function FindFit allows you to perform nonlinear least squares fitting. The function NonlinearRegress gives a number of regression diagnostics and allows you to ...
As of Version 7.0, GradientFieldPlot3D has been superseded by VectorPlot3D.