how to save plot handle in an array and delete the plot later?

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Hi
In my plot, I have 10 plots. I am creating a 1D array using handle_array=zeros(10,1), then later I save ith plot's handle to the array using handle_array(i)=plot_handle. Later I'd like to delete the specific plot using delete(handle_array(ith)), and I got an error of annot access method 'delete' in class 'matlab.ui.Root'.
I found the data saved in the handle array is not a handle and it is just a number.
so how to save the plot handle and delete the plot later? Thanks for your help.

Accepted Answer

Walter Roberson
Walter Roberson on 15 Jul 2021
handle_array=zeros(10,1)
handle_array = 10×1
0 0 0 0 0 0 0 0 0 0
Do not do that for any modern version of matlab. Instead use
handle_array = gobjects(10,1)
handle_array =
10×1 GraphicsPlaceholder array: GraphicsPlaceholder GraphicsPlaceholder GraphicsPlaceholder GraphicsPlaceholder GraphicsPlaceholder GraphicsPlaceholder GraphicsPlaceholder GraphicsPlaceholder GraphicsPlaceholder GraphicsPlaceholder
  3 Comments
roudan
roudan on 15 Jul 2021
Thank you Walter, ishandle() works perfectly! I appreicate your help. It saved me a lot of time! Have a great dat Sir!

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More Answers (1)

Devanuj Deka
Devanuj Deka on 15 Jul 2021
Edited: Devanuj Deka on 15 Jul 2021
I would suggest creating a cell array for handle_array. The function zeros(10,1) creates a 10x1 array of type 'double', which means you cannot store plot handles in it - it will store a numeric value instead of the plot handle.
With cell(sz1,...,szN) you can initialize an array with the same syntax as zeros(10,1), but you can store any data type in these individual cells.
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