cannot extract data from figure with multiple lines

Question

Nathaniel Goldfarb 2022-4-5

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1689380-cannot-extract-data-from-figure-with-multiple-lines

评论： Fangjun Jiang 2022-4-6

采纳的回答： Fangjun Jiang

traj.fig

在 MATLAB Online 中打开

Hello,

I have a matlab figure with muliple lines in it that I am trying to extact. However I can only get the figure line. I am not sure what is wrong. I created the figures in simulink

I am using the following code

fig = openfig('traj.fig');
h = findobj(gca,'Type','line');
y_no_humanX = get(h,'Xdata') ;
y_no_humanY = get(h,'Ydata') ;
close(fig);

when I try to extract the data I only get the first line and cannot get the other lines. I am not sure what is going on.

Any ideas?

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Answer 1

Fangjun Jiang 2022-4-5

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1689380-cannot-extract-data-from-figure-with-multiple-lines#answer_935665

编辑：Fangjun Jiang 2022-4-5

在 MATLAB Online 中打开

The other two "curves" are created using stairs(). use findobj(fig,'Type','Stair') to find those.

fig = openfig('traj.fig');
>> findobj(fig)
ans = 
12×1 graphics array:
Figure         (ScopePrintToFigure)
UIContainer    (PrintLayoutGridContainer)
UIContainer    (PrintContainer)
Panel          (DisplayPanel1)
Legend         (ref, Subsystem/1, Subsystem/3)
Axes           (DisplayAxes1_RealMag)
Stair          (DisplayLine2)
Stair          (DisplayLine1)
Line           (DisplayLine1)
Transform
Transform
Transform

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Nathaniel Goldfarb 2022-4-5

Thankyou, this helped a lot. I was able to change the line type from "stair" to "line" and resave the figure.

I was then able to read in the data using my other code. I am sure there is a better way but I only need to do this for two figures so its not that big a deal.