Why do I recieve an error when trying to change the Line Width of a plot line?

Question

Klaudio Myrtaj 2022-7-1

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1752055-why-do-i-recieve-an-error-when-trying-to-change-the-line-width-of-a-plot-line

编辑： Walter Roberson 2022-7-2

采纳的回答： Voss

I obtained a curve with the "Curve Fitter" App and in "Export Options" I chose "Generate a code".

When I try to modify the script just for changing the line width, the code doesn't run any more and returns an error.

Please can anyone help me to fix it? How can I change the line width?

Thank you!

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Answer 1

Voss 2022-7-1

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https://ww2.mathworks.cn/matlabcentral/answers/1752055-why-do-i-recieve-an-error-when-trying-to-change-the-line-width-of-a-plot-line#answer_998275

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The Name,Value pairs supported in plot from the Curve Fitting Toolbox (reference) are different than the Name,Value pairs supported in plot in base MATLAB (reference).

In particular, LineWidth is not supported in Curve Fitting Toolbox plot, so you have to modify the LineWidth of the appropriate line after the plot call:

% random data

xData = (1:10).';

yData = randn(10,1);

% Set up fittype and options.

ft = fittype( 'poly2' );

% Fit model to data.

[fitresult, gof] = fit( xData, yData, ft);

% Plot fit with data.

h = plot( fitresult, xData, yData) % two lines

h =

2×1 Line array: Line (data) Line (fitted curve)

% Set LineWidth of the fit line ( h(2) ) to 2.