User defined minimum Function

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Arpit Jain
Arpit Jain 2019-5-17
评论： Walter Roberson 2021-6-26
How to create user defined function to create a vector of minimum values column wise from the input array argument?

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回答（3 个）

Image Analyst
Image Analyst 2019-5-17
编辑：Image Analyst 2019-5-17
Try this:
function colMins = GetColumnMins(m) % m is a matrix
colMins = min(m, [], 1);
You can rename GetColumnMins, m, and colMins to (almost) whatever you want.
Walter Roberson
Walter Roberson 2019-5-17
编辑：Walter Roberson 2019-5-17
function mins = column_minima(input_array)
while any(any(diff(input_array,1,1) < 0))
input_array = shuffle_array(input_array);
end
mins = input_array(1,:);
function input_array = shuffle_array(input_array)
for col = 1 : size(input_array, 2)
input_array(:,col) = input_array( randperm(size(input_array,1)), col);
end
end
end
... confirmed working for 4 x 4 array.
Mostafa
Mostafa 2021-6-26
how can i create a function to calculate the minimum value at an array?
  2 个评论
Walter Roberson
Walter Roberson 2021-6-26
My code above https://www.mathworks.com/matlabcentral/answers/462749-user-defined-minimum-function#answer_375560 calculates the minimum column-by-column value of arrays without using any built-in minimum function. It uses one of the official recognized sorting algorithms: https://en.wikipedia.org/wiki/Bogosort

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