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Curve Fitting Toolbox Functions

Alphabetical List By Category

Linear and Nonlinear Regression

fitFit curve or surface to data
fittypeFit type for curve and surface fitting
fitoptionsCreate or modify fit options object
prepareCurveData Prepare data inputs for curve fitting
prepareSurfaceDataPrepare data inputs for surface fitting
excludedataExclude data from fit
argnames Input argument names of cfit, sfit, or fittype object
categoryCategory of fit of cfit, sfit, or fittype object
coeffnamesCoefficient names of cfit, sfit, or fittype object
coeffvaluesCoefficient values of cfit or sfit object
dependnamesDependent variable of cfit, sfit, or fittype object
fevalEvaluate cfit, sfit, or fittype object
formulaFormula of cfit, sfit, or fittype object
getGet fit options structure property names and values
indepnamesIndependent variable of cfit, sfit, or fittype object
islinearDetermine if cfit, sfit, or fittype object is linear
numargsNumber of input arguments of cfit, sfit, or fittype object
numcoeffsNumber of coefficients of cfit, sfit, or fittype object
probnamesProblem-dependent parameter names of cfit, sfit, or fittype object
setAssign values in fit options structure
setoptions Set model fit options
typeName of cfit, sfit, or fittype object

Interpolation

fitFit curve or surface to data
fittypeFit type for curve and surface fitting
fitoptionsCreate or modify fit options object
getGet fit options structure property names and values
setAssign values in fit options structure
fevalEvaluate cfit, sfit, or fittype object
prepareCurveData Prepare data inputs for curve fitting
prepareSurfaceDataPrepare data inputs for surface fitting
excludedataExclude data from fit

Smoothing

fitFit curve or surface to data
fittypeFit type for curve and surface fitting
fitoptionsCreate or modify fit options object
getGet fit options structure property names and values
setAssign values in fit options structure
smoothSmooth response data
prepareCurveData Prepare data inputs for curve fitting
prepareSurfaceDataPrepare data inputs for surface fitting
excludedataExclude data from fit

Fit Postprocessing

cfitConstructor for cfit object
sfitConstructor for sfit object
coeffnamesCoefficient names of cfit, sfit, or fittype object
coeffvaluesCoefficient values of cfit or sfit object
confintConfidence intervals for fit coefficients of cfit or sfit object
differentiateDifferentiate cfit or sfit object
fevalEvaluate cfit, sfit, or fittype object
integrateIntegrate cfit object
plotPlot cfit or sfit object
predintPrediction intervals for cfit or sfit object
probvaluesProblem-dependent parameter values of cfit or sfit object
quad2dNumerically integrate sfit object

Splines

Construction

bsplinePlot B-spline and its polynomial pieces
csapeCubic spline interpolation with end conditions
csapiCubic spline interpolation
csapsCubic smoothing spline
cscvn“Natural” or periodic interpolating cubic spline curve
getcurveInteractive creation of cubic spline curve
ppmakPut together spline in ppform
rpmakPut together rational spline
rscvnPiecewise biarc Hermite interpolation
rsmakPut together rational spline for standard geometric shapes
spap2Least-squares spline approximation
spapiSpline interpolation
spapsSmoothing spline
spcrvSpline curve by uniform subdivision
splinetoolExperiment with some spline approximation methods
spmakPut together spline in B-form
stmakPut together function in stform
tpapsThin-plate smoothing spline
sptermsExplain spline terms
frankeFranke's bivariate test function
titaniumTitanium test data

Postprocessing

fn2fmConvert to specified form
fnbrkName and part(s) of form
fnchgChange part(s) of form
fncmbArithmetic with function(s)
fnderDifferentiate function
fndirDirectional derivative of function
fnintIntegrate function
fnjmpJumps, i.e., f(x+)-f(x-)
fnminMinimum of function in given interval
fnpltPlot function
fnrfnRefine partition of form
fntlrTaylor coefficients
fnvalEvaluate spline function
fnxtrExtrapolate function
fnzerosFind zeros of function in given interval
frankeFranke's bivariate test function
sptermsExplain spline terms
titaniumTitanium test data

Breaks, Knots, and Sites

aptkntAcceptable knot sequence
augkntAugment knot sequence
avekntProvide knot averages
brk2kntConvert breaks with multiplicities into knots
chbpntGood data sites, Chebyshev-Demko points
knt2brk, knt2mltConvert knots to breaks and their multiplicities
newkntNew break distribution
optkntKnot distribution “optimal” for interpolation
sortedLocate sites with respect to mesh sites
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