cflibhelp (Curve Fitting Toolbox)

Curve Fitting Toolbox

cflibhelp

Display information about library models, splines, and interpolants

Syntax

```
cflibhelp
cflibhelp group
```

Arguments

group
The name of the fit type group.

`group`	The name of the fit type group.

Description

cflibhelp displays the names, equations, and descriptions for all the fit types in the curve fitting library. You can use the fit type name as an input parameter to the fit, cfit, and fittype functions.

cflibhelp group displays the names, equations, and descriptions for the fit type group specified by group. The supported fit type groups are given below.

Group
Description

distribution
Distribution models such as Weibull

exponential
One-term and two-term exponential equations

fourier
Sums of sine and cosine equations up to eight terms

gaussian
Sums of Gaussian equations up to eight terms

interpolant
Interpolant fit types including linear, nearest neighbor, cubic spline, and shape-preserving interpolation

polynomial
Polynomial equations up to ninth degree

power
One-term and two-term power equations

rational
Ratios of polynomial equations up to degree 5 in both numerator and denominator

sin
Sums of sine equations up to eight terms

spline
Cubic spline and smoothing spline fit types

Group	Description
`distribution`	Distribution models such as Weibull
`exponential`	One-term and two-term exponential equations
`fourier`	Sums of sine and cosine equations up to eight terms
`gaussian`	Sums of Gaussian equations up to eight terms
`interpolant`	Interpolant fit types including linear, nearest neighbor, cubic spline, and shape-preserving interpolation
`polynomial`	Polynomial equations up to ninth degree
`power`	One-term and two-term power equations
`rational`	Ratios of polynomial equations up to degree 5 in both numerator and denominator
`sin`	Sums of sine equations up to eight terms
`spline`	Cubic spline and smoothing spline fit types

For more information about the toolbox library models, refer to Library Models. For more information about the toolbox library interpolants and splines, refer to Nonparametric Fitting.

Example

Display the names and descriptions for the spline fit type group.

cflibhelp spline

SPLINES

        SPLINETYPE             DESCRIPTION

        cubicspline            cubic interpolating spline
        smoothingspline        smoothing spline

Display the model names and equations for the polynomial fit type group.

cflibhelp polynomial

  POLYNOMIAL MODELS

        MODELNAME             EQUATION

          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

See Also

cfit, fit, fittype

cfit cftool