how to build array using matlab.graphics.chart.primitive.Line' property

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shamal 2025-6-7

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https://ww2.mathworks.cn/matlabcentral/answers/2177605-how-to-build-array-using-matlab-graphics-chart-primitive-line-property

评论： shamal 2025-6-8

采纳的回答： Cris LaPierre

在 MATLAB Online 中打开

Look this example:

selected = findobj(allLines,'Type','line','LineWidth',0.5);
[cc]=selected;   

selected 13x1

xx selected 13x1

this is ok

now i try to use selected property:

selected.Color

it give me 13x1 color!

now i try to record information in array but it's not possible

[cc]=selected.Color

now i see cc have only the first element!

can i do it?

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采纳的回答

Cris LaPierre 2025-6-7

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2177605-how-to-build-array-using-matlab-graphics-chart-primitive-line-property#answer_1566085

编辑：Cris LaPierre 2025-6-7

在 MATLAB Online 中打开

If I understand correctly, you want cc to just be the color of the selected lines. In that case, note that selected.Color does not return a 13x1 array, It returns 13 1x3 arrays. Try the following instead.

z = rand(10,13);

plot(z)

selected = findobj(gcf,'Type','line','LineWidth',0.5);

cc=selected

cc =

13×1 Line array: Line Line Line Line Line Line Line Line Line Line Line Line Line

cc=vertcat(selected.Color)

cc = 13×3

0.1840 0.7450 0.9370 0.2310 0.6660 0.1960 0.5210 0.0860 0.8190 0.9290 0.6940 0.1250 0.8660 0.3290 0 0.0660 0.4430 0.7450 0.8190 0.0150 0.5450 0.1840 0.7450 0.9370 0.2310 0.6660 0.1960 0.5210 0.0860 0.8190 0.9290 0.6940 0.1250 0.8660 0.3290 0 0.0660 0.4430 0.7450

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You can find a longer explanation of what is happening here: https://www.mathworks.com/matlabcentral/answers/29190-property-access-of-objects-arrays