ginput and plot data

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Pablo 2012-1-5

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https://ww2.mathworks.cn/matlabcentral/answers/25417-ginput-and-plot-data

回答： Stefano Dalla Gasperina 2020-9-10

Hi, i have a question:

When i click near of a pointF (pointF is a point that belongs to the function plotted on the graph), is there a way that "ginput" gives me that pointF?

Example: "ginput" gives me (37.8, 251.3), but the point that belongs to the function plotted is (38, 250), i need that "ginput" gives me (38,250) when i click on (37.8, 251.3)

Regards, and sorry for my Tarzan english xD

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采纳的回答

Sean de Wolski 2012-1-5

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https://ww2.mathworks.cn/matlabcentral/answers/25417-ginput-and-plot-data#answer_33338

在 MATLAB Online 中打开

minimum absolute differences kick in again:

xx = 1:10; %xdata
yy = exp(xx);
plot(xx,yy);
[xm ym] = ginput(1); %xmouse, ymouse
%Engine
[~, xidx] = min(abs(xx-xm)); %closest index
[~, yidx] = min(abs(yy-ym));
x_closest = xx(xidx) %extract
y_closest = yy(yidx)

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Chad Greene 2014-12-9

Yunus: clickz do what you want?

Sean de Wolski 2014-12-9

Or impoint

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