how to calculate the moving minimum of a vector in matlab

One way to calculate the moving minimum of a vector in Matlab is to use the filter function with a vector of ones as the filter coefficients. Here is an example code snippet:

main.m
v = [3 4 2 1 5 2 6 7 8]; % example vector
w = 3; % window size
movmin_v = filter(ones(1,w), 1, v, [], 2);
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In the above code, v is the input vector, w is the window size, and movmin_v is the resulting vector of moving minimums. The filter function applies a moving average with a window size of w to the input vector v, which effectively calculates the moving minimum. The [] argument is used for padding the input vector to ensure the output is the same size as the input. The 2 argument specifies that the filter operates along the second dimension of the input vector, which is the row dimension in this example.