How can I calculate the grouped data?

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wd w
wd w 2024-2-16
评论： Dyuman Joshi 2024-2-16
I have some grouped data, and intend to perform an element-wise squaring one by one and find out the minimum of calculated results of each grouped data. The following is an example, but unfortunately it doesn't work.
x11 = [1 2 3 6 5 4];
x22 = [11 12 13 16 15 14];
y(ii) = x(ii).^2;
m(ii) = min(y(ii))

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Dyuman Joshi
Dyuman Joshi 2024-2-16
Ran in:
Dynamically naming variables is not a good programming practice - TUTORIAL: Why Variables Should Not Be Named Dynamically (eval)
An efficient method is to store the data in an array -
x= [1 2 3 6 5 4; 11 12 13 16 15 14];
%Element-wise power
y = x.^2
y = 2×6
1 4 9 36 25 16 121 144 169 256 225 196
%Find the minimum of each row
m = min(y, [], 2)
m = 2×1
1 121
If the data does not have compatible dimensions for concatenating into a numeric array, consider storing the data in a cell array, and perform operations on the data accordingly.

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