What problem are you actually having with 'diff'? Now if you are using
'diff', you will get a vector that is shorter by one than the
original. Now do you want to do do something like:
Xbar = Sum{c(Depth[1], diff(Depth))*temp}/Sum(c(Depth[1], diff(Depth))
On 10/12/07, Thomas Miller <[EMAIL PROTE
Colleagues,
I am analyzing data collected during oceanographic cruises. We have
conducted many cruises over the last decade. On each cruise we visit ~50
stations. At each station (termed EventNum)we lower an instrument that
measures depth, temperature, salinity and oxygen every few seconds as it
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