MATLAB: I cannot find the minimum values for matrix.

errorminminimumnamespaceoverloaded function

theres no problem to find maximum values. but when it come to find minimum values, got error as below.
can somebody tell me what is the error mean ? and how exactly to find the minimum values in each colum in matrix T ?
Thank you,
T =
    1.0000  242.0000   24.7385   33.8409    1.0000
    2.0000  716.0000   83.2151   50.1744    1.0000
>> M = max (T)
M =
    2.0000  716.0000   83.2151   50.1744    1.0000
>> N = min (T)
Array indices must be positive integers or logical values.

Best Answer

Alternative method to find the minium value for each column:
min(T,[],1)
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