How to add elements inside a matrix

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rows = [["SOBs", 60, 80, 70, 75],
["Test1", 60, 50, 60, 65],
["Test2", 40, 30, 40, 45],
["Test3", 45, 90, 80, 85],
["CW", 40, 80, 70, 75]]

I need to add the first element from each list. So 60+60+40+45+40. But the string needs to stay.

What I have tried:

sum(sum(rows, [2]))

print(sum(rows[0][1] + [1][1]))

I tried overload as well, but that requires two separate lists. Same seems to be true for numpy.

Posted 21-Nov-21 20:39pm

mondo2

Updated 21-Nov-21 21:23pm

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mondo2 · Accepted Answer · 2021-11-21T21:23:00

got it from stackoverflow

element = 1
rows = [["SOBs", 60, 80, 70, 75], ["Test1", 60, 50, 60, 65], ["Test2", 40, 30, 40, 45], ["Test3", 45, 90, 80, 85], ["CW", 40, 80, 70, 75]]
sum_1= sum([rows[i][element] for i in range(len(rows))])
element = 2
sum_2= sum([rows[i][element] for i in range(len(rows))])
print((sum_1*100)/(sum_1+sum_2))