finding euclidean distance,better code?

[harryos]

> the norm from which it is derived is called norm-1, or L1; the usual > euclidean distance is derived from norm-2.

> If you only want to see if two things are "close enough", this provides a  faster measure than the euclidean distance.


thanks Gabriel for the detailed explanation..
if i were to calculate the euclidean distance in the above example how
should i go about it..?
should i replace
distance = abs(input_wk - weights[image, :])
with something else?
thanks again
oharry