Hi list,

I have a 1710x244 matrix of numerical values and I would like to calculate the 
mean of every group of three consecutive values per column to obtain a new 
matrix of 570x244.  I could get it done using a for loop but how can I do that 
using apply functions?
In addition to this, do I have to initizalize a 570x244 matrix with 0's to 
store the calculated values or can the output matrix be generated while 
calculating the mean values?

Cheers,

Dave
                                          
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