How to find corresponding value of randomly selected value in a table

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Amethyst McLaughlin
回答： Rahul 2024-9-11
Let's say I have a table of x and y values. I know how to randomly select an x value but need help obtaining the corresponding y value.
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Riccardo Scorretti
Riccardo Scorretti 2022-5-1
It depends on the meaning of "corresponding". What is the relationship between x and y? Can you give an example of what you want?

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回答（1 个）

Rahul
Rahul 2024-9-11
Hi @Amethyst McLaughlin,
I understand that you have a table consisting of x and y values. According to your descriptiong, if you have a randomly selected x value from the table. you need to find the corresponding y value from the table.
You can achieve the desired result by using the 'find' function in the following way:
% Considering 'dataTable' as the variable for the table with column names
% as 'X' and 'Y'
randX = 3; % randomly selected x value
% Find the index of the given x value
index = find(dataTable.X == randX);
% Retrieve the corresponding y value
correspondingY = dataTable.Y(index);
fprintf('Corresponding y value: %d\n', correspondingY);
You can refer to the following Mathworks documentation to know more about the 'find' function:
'find': https://www.mathworks.com/help/releases/R2024a/matlab/ref/find.html?searchHighlight=find&s_tid=doc_srchtitle
Hope this helps!

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