Setting different properties for some line objects stored in the same handle

Question

KAE 2020-1-6

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/499139-setting-different-properties-for-some-line-objects-stored-in-the-same-handle

评论： KAE 2020-1-6

采纳的回答： Fangjun Jiang

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Let's say I have a handle h1 that contains several line objects, like so:

h1 = plot(1:10, rand(10, 25)); % h1 contains 10 line objects

I want to change the properties of some but not all of the lines, such as making the 3rd and 5th lines wider. How do I do this? Here is what I have tried,

h1([3 5]).LineWidth = 2; % Try to change two of the lines at once
% Expected one output from a curly brace or dot indexing expression, but there were 2 results.
h1({[3 5]}).LineWidth = 2; % Try to change two of the lines at once
% Unable to use a value of type cell as an index.
h1{3}.LineWidth = 2; % Try to change just one line
% Unable to perform assignment because brace indexing is not supported for variables of this type.

What do I need to do differently?

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Answer 1

Fangjun Jiang 2020-1-6

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https://ww2.mathworks.cn/matlabcentral/answers/499139-setting-different-properties-for-some-line-objects-stored-in-the-same-handle#answer_408908

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set(h1([3,5]),'LineWidth',2)

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Answer 2

Tom Holz 2020-1-6

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https://ww2.mathworks.cn/matlabcentral/answers/499139-setting-different-properties-for-some-line-objects-stored-in-the-same-handle#answer_408909

编辑：Tom Holz 2020-1-6

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You can do this with the old-style set() functions, like this:

set(h1([3 5]), 'LineWidth', 2);

Or you can use deal(), like this:

[ h1([3 5]).LineWidth ] = deal(2);

I don't believe there are functional difference between the two.

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Tom Holz 2020-1-6

编辑：Tom Holz 2020-1-6

Thanks. I tend to avoid deal() in practice because I think the code is slightly more confusing to look at. And I also like how the property name is colored differently when using set() because it's quoted text. That makes it easy to scan code and see property names in a different color.

KAE 2020-1-6