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How to use a drop down menu to show an image based on selection.

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Daniel
Daniel 2022 年 11 月 5 日
コメント済み: Fazlollah 2023 年 2 月 16 日
I am trying to create an app component that shows solar radiation on the earth. the user will use a drop down menu and select a region on earth( North America, Asia....). Then I want the image to be displayed on the image app after they select a region. What is the best approach.

回答 (1 件)

Mario Malic
Mario Malic 2022 年 11 月 6 日
Hello,
I would put those pictures in a cell array
images = cell(5,1);
images{1} = imread("path"); % and so on
Define ItemsData property in the DropDown component to take numeric value from 1 to n-pictures
app.DropDown.ItemsData = 1:5;
Then, you are able to use the Value, even if it's a character array, it will take the ItemsData value which you can use to index into cell array with images.
images{app.DropDown.Value}
  5 件のコメント
Mario Malic
Mario Malic 2022 年 11 月 7 日
編集済み: Mario Malic 2022 年 11 月 7 日
I would definitely suggest you to do few basic programs and maybe MATLAB Onramp before you proceed.
% a = cell{5,1} is not the way to initialize a cell array
The choice for callback wasn't appropriate. Furthermore, read on properties of the apps and how to properly use them within the different callbacks.
You need to redo your paths for apps, as I changed some code for images to test it on my PC.
Fazlollah
Fazlollah 2023 年 2 月 16 日
Great Answer, thank you. you also added a private property "image".

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