No legend when plotting fit object

Question

Daniel 2021-2-22

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https://ww2.mathworks.cn/matlabcentral/answers/753144-no-legend-when-plotting-fit-object

编辑： dpb 2021-2-23

When you plot a fit object, it automatically adds a legend. For example, 'plot(myfit)', in which 'myfit' is the output of 'fit' would plot the fit line and a legend showing that line with the name "fitted". If you're plotting fit objects in a loop, the legend really slows it down, and, also, I don't want the legend. I tried removing the legends after the plot is done plotting, but the slow part is making the legends, so that doesn't help. Not sure if it's relevant, but this is in a plot with 42 subplots. I did some searching, but couldn't find this particular question asked before. Anyway to just not make the legend to begin with?

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Answer 1

dpb 2021-2-22

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https://ww2.mathworks.cn/matlabcentral/answers/753144-no-legend-when-plotting-fit-object#answer_630554

编辑：dpb 2021-2-23

Doesn't seem to be any way to prevent the builtin fit object plot() routine from adding the legend.

Instead, use

plot(x,myfit(x),'linespec');

for the x that was the input to create myfit object. This will bypass the cfit object plot by evaluating it only and then call the base MATLAB plot() routine.

Does seem worthy of enhancement request to allow for further customization options on creation of fit object plots.

I didn't try to do comparison timings...