Store plot values in a variable and then plot it

8 次查看（过去 30 天）
Julen Vicente Pipaon
回答： Simon Chan 2022-3-17
I am trying to save the values of the first figure in a variable and then plot it.
But as you can see my code doesn't plot the same thing in the first figure and in the second one.
I don't know if plotdata.XData(index) and plotdata.YData is what doesn't work or if it is the greiddedInterpolant.
M=200; %Slope of my lines
x=linspace(0,M,127);
y=linspace(0,1,127);
x1=linspace(M,255,127);
y1=linspace(1,0,127);
hold on
plotdata=plot(x,y)
plotdata1=plot(x1,y1);
hold off
[~, index] = sort(plotdata.XData);
F = griddedInterpolant(plotdata.XData(index), plotdata.YData(index));
[~, index] = sort(plotdata1.XData);
F1 = griddedInterpolant(plotdata1.XData(index), plotdata1.YData(index));
F2=[F.Values F1.Values];
figure
plot(F2)

请先登录，再回答此问题。

采纳的回答

Simon Chan
Simon Chan 2022-3-17
Ran in:
F.Values and F1.Values are those y-values only and hence the plot does not have any information about the corresponding x-values.
The x-value are stored in F.GridVectors and F1.GridVectors so modifying the last line is able to plot the 2nd figure correctly,
M=200; %Slope of my lines
x=linspace(0,M,127);
y=linspace(0,1,127);
x1=linspace(M,255,127);
y1=linspace(1,0,127);
plotdata=plot(x,y);
hold on
plotdata1=plot(x1,y1);
hold off
[~, index] = sort(plotdata.XData);
F = griddedInterpolant(plotdata.XData(index), plotdata.YData(index));
[~, index] = sort(plotdata1.XData);
F1 = griddedInterpolant(plotdata1.XData(index), plotdata1.YData(index));
figure
plot([F.GridVectors{1},F1.GridVectors{1}], [F.Values, F1.Values]);

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Interpolation 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by