插值

拟合插值曲线或曲面，估计已知数据点之间的值

插值是一种估计已知数据点之间的值的方法。您可以使用插值来对观测到的数据进行平滑处理，填充缺失数据并进行预测。Curve Fitting Toolbox™ 函数允许您通过对数据进行曲线或曲面拟合来执行插值。

要以交互方式拟合插值曲线或曲面，请使用曲线拟合器。使用 fit 函数在命令行中拟合插值曲线或曲面。有关详细信息，请参阅Interpolation with Curve Fitting Toolbox。

App

对数据进行曲线和曲面拟合

`excludedata`	Exclude data from fit
`fit`	对数据进行曲线或曲面拟合
`fittype`	Fit type for curve and surface fitting
`fitoptions`	Create or modify fit options object
`get`	Get fit options structure property names and values
`set`	Assign values in fit options structure
`feval`	Evaluate `cfit`, `sfit`, or `fittype` object
`prepareCurveData`	Prepare data inputs for curve fitting
`prepareSurfaceData`	Prepare data inputs for surface fitting

Interpolation with Curve Fitting Toolbox
Apply interpolation methods to estimate values between known data points for curves and surfaces.
Extrapolation for Interpolant Fit Types
Extrapolation is a process for estimating dependent variable values for independent variable values outside of the fitting data domain.
Nonparametric Fitting
Perform nonparametric fitting to create smooth curves or surfaces through your data with interpolants and smoothing splines.