On 9/9/2013 6:40 AM, Puneet wrote: > Hi - this is begginers question. > I have a data set - 16 rows and 16 columns - I would like to average > every 2 points to get an 8 rows 8 columns matrix. > > This is a learning phase so I can run something similar later for larger > data sets. > Thanks.
One way...(not necessarily the best :) ) presuming that the "every 2 points" means in both directions given the resulting size of output for the described input. Similar works w/ filter() for the vector case.
Hint: look up 2D convolution... :)
accumarray() could be you friend amongst other ways to attack it...