Learn more about Curve Fitting Toolbox

Function Reference

Alphabetical List

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Fitting Curves and Surfaces Fitting Splines

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Fitting Curves and Surfaces

• Data Preprocessing

• Data Fitting

• Fit Type Methods

• Curve Fit Methods

• Surface Fit Methods

• Fit Postprocessing

• Information and Help

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Data Preprocessing

cftool	Open Curve Fitting Tool
excludedata	Exclude data from fit
smooth	Smooth response data

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Data Fitting

cftool	Open Curve Fitting Tool
fit	Fit model to data
fitoptions	Create or modify fit options structure
fittype	Constructor for fittype object
get	Get fit options structure property names and values
prepareSurfaceData	Prepare data inputs for surface fitting
set	Assign values in fit options structure
sftool	Open Surface Fitting Tool

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Fit Type Methods

argnames	Input argument names of cfit, sfit, or fittype object
category	Category of fit of cfit, sfit, or fittype object
coeffnames	Coefficient names of cfit, sfit, or fittype object
dependnames	Dependent variable of cfit, sfit, or fittype object
feval	Evaluate cfit, sfit, or fittype object
fittype	Constructor for fittype object
formula	Formula of cfit, sfit, or fittype object
indepnames	Independent variable of cfit, sfit, or fittype object
islinear	Determine if cfit, sfit, or fittype object is linear
numargs	Number of input arguments of cfit, sfit, or fittype object
numcoeffs	Number of coefficients of cfit, sfit, or fittype object
probnames	Problem-dependent parameter names of cfit, sfit, or fittype object
setoptions	Set model fit options
type	Name of cfit, sfit, or fittype object

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Curve Fit Methods

argnames	Input argument names of cfit, sfit, or fittype object
category	Category of fit of cfit, sfit, or fittype object
cfit	Constructor for cfit object
coeffnames	Coefficient names of cfit, sfit, or fittype object
coeffvalues	Coefficient values of cfit or sfit, object
confint	Confidence intervals for fit coefficients of cfit or sfit object
dependnames	Dependent variable of cfit, sfit, or fittype object
differentiate	Differentiate cfit or sfit object
feval	Evaluate cfit, sfit, or fittype object
formula	Formula of cfit, sfit, or fittype object
indepnames	Independent variable of cfit, sfit, or fittype object
integrate	Integrate cfit object
islinear	Determine if cfit, sfit, or fittype object is linear
numargs	Number of input arguments of cfit, sfit, or fittype object
numcoeffs	Number of coefficients of cfit, sfit, or fittype object
plot	Plot cfit or sfit object
predint	Prediction intervals for cfit or sfit object
probnames	Problem-dependent parameter names of cfit, sfit, or fittype object
probvalues	Problem-dependent parameter values of cfit or sfit object
setoptions	Set model fit options
type	Name of cfit, sfit, or fittype object

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Surface Fit Methods

argnames	Input argument names of cfit, sfit, or fittype object
category	Category of fit of cfit, sfit, or fittype object
coeffnames	Coefficient names of cfit, sfit, or fittype object
coeffvalues	Coefficient values of cfit or sfit, object
confint	Confidence intervals for fit coefficients of cfit or sfit object
dependnames	Dependent variable of cfit, sfit, or fittype object
differentiate	Differentiate cfit or sfit object
feval	Evaluate cfit, sfit, or fittype object
formula	Formula of cfit, sfit, or fittype object
indepnames	Independent variable of cfit, sfit, or fittype object
islinear	Determine if cfit, sfit, or fittype object is linear
numargs	Number of input arguments of cfit, sfit, or fittype object
numcoeffs	Number of coefficients of cfit, sfit, or fittype object
plot	Plot cfit or sfit object
predint	Prediction intervals for cfit or sfit object
probnames	Problem-dependent parameter names of cfit, sfit, or fittype object
probvalues	Problem-dependent parameter values of cfit or sfit object
quad2d	Numerically integrate sfit object
setoptions	Set model fit options
sfit	Constructor for sfit object
type	Name of cfit, sfit, or fittype object

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Fit Postprocessing

cftool	Open Curve Fitting Tool
coeffvalues	Coefficient values of cfit or sfit, object
confint	Confidence intervals for fit coefficients of cfit or sfit object
differentiate	Differentiate cfit or sfit object
feval	Evaluate cfit, sfit, or fittype object
integrate	Integrate cfit object
plot	Plot cfit or sfit object
predint	Prediction intervals for cfit or sfit object
probvalues	Problem-dependent parameter values of cfit or sfit object

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Information and Help

cflibhelp	Information on library models
datastats	Data statistics

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Fitting Splines

• Spline GUI Access

• Spline Construction

• Spline Operators

• Spline Breaks, Knots, and Sites

• Spline Utilities

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Spline GUI Access

bspligui	Experiment with B-spline as function of its knots
splinetool	Experiment with some spline approximation methods

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Spline Construction

csape	Cubic spline interpolation with end conditions
csapi	Cubic spline interpolation
csaps	Cubic smoothing spline
cscvn	"Natural" or periodic interpolating cubic spline curve
getcurve	Interactive creation of cubic spline curve
ppmak	Put together spline in ppform
rpmak	Put together rational spline
rscvn	Piecewise biarc Hermite interpolation
rsmak	Put together rational spline for standard geometric shapes
spap2	Least-squares spline approximation
spapi	Spline interpolation
spaps	Smoothing spline
spcrv	Spline curve by uniform subdivision
spmak	Put together spline in B-form
stmak	Put together function in stform
tpaps	Thin-plate smoothing spline

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Spline Operators

fn2fm	Convert to specified form
fnbrk	Name and part(s) of form
fnchg	Change part(s) of form
fncmb	Arithmetic with function(s)
fnder	Differentiate function
fndir	Directional derivative of function
fnint	Integrate function
fnjmp	Jumps, i.e., f(x+)-f(x-)
fnmin	Minimum of function in given interval
fnplt	Plot function
fnrfn	Refine partition of form
fntlr	Taylor coefficients or polynomial
fnval	Evaluate function
fnxtr	Extrapolate function
fnzeros	Find zeros of function in given interval

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Spline Breaks, Knots, and Sites

aptknt	Acceptable knot sequence
augknt	Augment knot sequence
aveknt	Provide knot averages
brk2knt	Convert breaks with multiplicities into knots
chbpnt	Good data sites, Chebyshev-Demko points
knt2brk, knt2mlt	Convert knots to breaks and their multiplicities
newknt	New break distribution
optknt	Knot distribution "optimal" for interpolation
sorted	Locate sites with respect to mesh sites

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Spline Utilities

bkbrk	Part(s) of almost block-diagonal matrix
bspline	Plot B-spline and its polynomial pieces
franke	Franke's bivariate test function
slvblk	Solve almost block-diagonal linear system
spcol	B-spline collocation matrix
splpp, sprpp	Taylor coefficients from local B-coefficients
spterms	Explain spline terms
stcol	Scattered translates collocation matrix
subplus	Positive part
titanium	Titanium test data

List of Terms

Functions — Alphabetical List

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