plot a fitted curve and specified axes

Heyhey,

I have a problem with the follwing lines

fit_func = fittype("poly1");
fitdata = fit(XValues,YValues,fit_func);
h=plot(ax,fitdata);

-> so I got the error

Error using plot
Data must be numeric, datetime, duration or an array convertible to double.

If I use this line instead:

h=plot(fitdata);

Everything is fine

So my question: how am I able to use plot to creates the line in the axes specified by ax?

[Alexander Richter]

Iam stucked at the same issue, did not find a solution yet. Any updates on the problem? Thanks

[Geoff Hayes]

@Alexander Richter - are you using the same code or something different? Please provide details.

[Wave]

@Alexander Richter No updates from my side. Still using it without the specification of ax

Answer 1

[Geoff Hayes]

Wave - from plot cfit or sfit object, try doing

plot(fitdata, 'Parent', hAxes)

where hAxes is the handle to your axes.

[Wave]

This will result to the error:

Error using cfit/plot>parseinput (line 332)
Must specify both XDATA and YDATA.

Error in cfit/plot (line 46)
[S1,xdata,ydata,S2,outliers,S3,ptypes,conflev] = parseinput(alltypes,varargin);

[Geoff Hayes]

What does the documentation for your version of MATLAB say about using plot and fit objects?

[Marleen]

Why is it possible to specify the parent axes (a Name Value pair) for sfit objects but not for cfit?

[Geoff Hayes]

@Marleen - you may want to ask this as a new question.