Matlab nlinfit错误

Question

我在MATLAB中遇到以下错误，我无法完全解释它并确定原因。我正在使用fitnlm函数

帮助真的很感激。提前谢谢。

Error using nlinfit>checkFunVals (line 636)
The function you provided as the MODELFUN input has returned Inf or NaN values.

Error in nlinfit>LMfit (line 583)
if funValCheck && ~isfinite(sse), checkFunVals(r); end

Error in nlinfit (line 276)
[beta,J,~,cause,fullr] = LMfit(X,yw, modelw,beta,options,verbose,maxiter);

Error in NonLinearModel/fitter (line 1123)
nlinfit(X,y,F,b0,opts,wtargs{:},errormodelargs{:});

Error in classreg.regr.FitObject/doFit (line 220)
model = fitter(model);

Error in NonLinearModel.fit (line 1430)
model = doFit(model);

Error in fitnlm (line 94)
model = NonLinearModel.fit(X,varargin{:});

这个错误只是由于输入数据在模型函数的某些点上是不可微的吗？