Remove rows in a matrix in python if rows length is less without using pandas or numpy

Asked Nov 18 '18 at 16:59

Active Nov 18 '18 at 17:26

Viewed 114 times

I wanted to remove rows in a matrix which has a length less than a certain length without using pandas or numpy or any other libraries.

I have written the following code which I think should remove the rows, but it's not happening. Please suggest a better solution.

mat = [[1,2,3],[4,6],[7,8,9],[1,2,3,4,5,6]]

for x in mat:
    if len(x) < 5 :
        mat.remove(x)

print(mat)

Output :

[[4, 6], [1, 2, 3, 4, 5, 6]]

Expected Output :

[[1, 2, 3, 4, 5, 6]]

edited Nov 18 '18 at 17:26

asked Nov 18 '18 at 16:59

noswear

1

`pd.DataFrame(mat).dropna(thresh=5).values` – rafaelc Nov 18 '18 at 17:13
@RafaelC I already said without pandas or numpy. – noswear Nov 18 '18 at 17:16
You tagged `numpy` and `pandas` for what reason, then? – rafaelc Nov 18 '18 at 17:19
@RafaelC Thanks for the answer bdw. – noswear Nov 18 '18 at 17:22
@RafaelC to clearly mention not to use them – noswear Nov 18 '18 at 17:22
1

This makes no sense at all.. anyway, `[sub for sub in mat if len(sub)>5]` – rafaelc Nov 18 '18 at 17:28

0 Answers0