How do I combine legend entries for a spline and data points?

Question

Stuart 2012-10-16

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https://ww2.mathworks.cn/matlabcentral/answers/51027-how-do-i-combine-legend-entries-for-a-spline-and-data-points

评论： jingyi lai 2021-2-17

I'm plotting a series of discrete data points and using a 'pchip' spline to create a smooth curve that passes through the points. In the legend I would like it to appear as a line with a marker and not as two separate entries. Is there a way to combine them into a single entry?

Thanks!

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Answer 1

Matt Fig 2012-10-16

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https://ww2.mathworks.cn/matlabcentral/answers/51027-how-do-i-combine-legend-entries-for-a-spline-and-data-points#answer_62166

编辑：Matt Fig 2012-10-16

在 MATLAB Online 中打开

Here is an example:

% First set up the data and the spline fit plot.
x = -3:3; 
y = [-1 -1 -1 0 1 1 1]; 
t = -3:.01:3;
p = pchip(x,y,t);
plot(x,y,'or',t,p,'-b')
L = legend('Fitted Data');  % Pass only final string.
% Now we can fix the legend.
H = findall(gcf,'marker','none','linestyle','none');
set(H,'linestyle','-','color',[0 0 1]);
set(L,'location','east')

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Nathaniel H Werner 2019-6-27

I just ran this script from the answer in R2018b since I have a similar problem and it does not work. This is the final result. As you can see it still only labels the red dots in the legend when it should also have a blue line going through it as far as I understand the original question.

jingyi lai 2021-2-17