groovy - Get all elements at index in 2d array -

i writing ml algorithm have list of tuples so:

[ [17582.0, 6.382129, 0.876581], [9868.0, 2.694977, 0.432818], [18333.0, 3.951256, 0.3333] ...]

so, index=0 refer specific value feature. normalize, need min , max of every feature.

is there short hand way elements @ index = 0 or index = 1, , on of tuples?

assuming values in variable list

then can do:

def firstelements = list*.head()

if need specific position, can do:

def secondelements = list*.getat(1)

to column-wise min , max, transpose list, calculation:

def cwminmax = list.transpose().collect { [it.min(), it.max()] }

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