how can i slice a dataframe to exclude a range of index?
A B C D
1 1 4 6 1
2 4 5 4 1
3 7 3 4 1
.
.
.
98 1 1 2 4
99 6 3 4 6
100 4 5 3 6
What is the easiest way to remove say 10:20 indexed data points from this dataframe?