cflibhelp - Information on library models

Syntax

cflibhelp cflibhelp libtype help cflibhelp

Description

Enter cflibhelp to display the names, equations, and descriptions of all models in the Curve Fitting Library. The Curve Fitting Library is a library of models for data fitting with the fit function. You use library names as input arguments in the fit, fitoptions, and fittype functions. To find out what input arguments you can use, enter:

cflibhelp libtype

Where libtype is a library type listed in the tables below.

cflibhelp libtype displays the names, equations, and descriptions for the library models of the specified type, libtype.

Enter help cflibhelp to display only the list of library types.

For Curves: `libtype`	Description
`distribution`	Distribution models such as Weibull
`exponential`	Exponential function and sum of two exponential functions
`fourier`	Up to eight terms of Fourier series
`gaussian`	Sum of up to eight Gaussian models
`power`	Power function and sum of two power functions
`rational`	Rational equation models, up to 5th degree/5th degree(i.e., up to degree 5 in both the numerator and the denominator)
`sin`	Sum of up to eight sin functions
`spline`	Cubic spline and smoothing spline models
`interpolant`	Interpolating models, including linear, nearest neighbor, cubic spline, and shape-preserving cubic spline
`polynomial`	Polynomial models, up to degree nine

For Surfaces: `libtype`	Description
`interpolant`	Interpolating models, including linear, nearest neighbor, cubic spline, and biharmonic interpolation
`polynomial`	Polynomial models, up to degree five
`lowess`	Lowess smoothing models

For more information on library models, refer to the Library Models section of the User's Guide.

Example

To list only the model equations for a libtype group, type cflibhelp followed by the group name, for example:

cflibhelp polynomial

POLYNOMIAL MODELS

        MODELNAME             EQUATION

    Curves:
          poly1                Y = p1*x+p2
          poly2                Y = p1*x^2+p2*x+p3
          poly3                Y = p1*x^3+p2*x^2+...+p4
          ...
          poly9                Y = p1*x^9+p2*x^8+...+p10
    Surfaces:

     Model names for polynomial surfaces are 'polyij', 
	     where i is the degree in x and j is the degree in y.
     The maximum for both i and j is five. The degree of
     the polynomial is the maximum of i and j. The degree
     of x in each term will be less than or equal to i,
     and the degree of y in each term will be less than or
     equal to j. For example:

          poly21  Z = p00 + p10*x + p01*y + p20*x^2 + p11*x*y
          poly13  Z = p00 + p10*x + p01*y + p11*x*y + p02*y^2 
                      + p12*x*y^2 + p03*y^3
          poly55  Z = p00 + p10*x + p01*y +...+ p14*x*y^4 
                      + p05*y^5

cflibhelp - Information on library models

Syntax

Description

Example

See Also

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