The operator only works on real float scalar.

p0y = sum(q0)

p0y = sum(q0,'yyyy mm dd hh mm ss.s')

sum(q(k)) = q0(0) + q0(1) + ... + q0(k) q0(0) is the first sample in the interval q0(k) is the k'th sample in the interval k = 0, 1, ... , n-1 n is number of samples in the interval sum(q(k)'yyyy mm dd hh mm ss.s') = q0(i) + q0(i+1) + ... + q0(k) q0(i) is the first sample in the interval with time greater or equal 'yyyy mm dd hh mm ss.s' q0(k) is the k'th sample in the interval k = i, i+1, ... , n-1

The operator only works on real float scalar.

p0y = diff(q0)

diff(q(k)) = q0(k+1) − q0(k) q0(0) is the first sample in the data segment q0(k) is the k'th sample in the data segment k = 0, 1, ... , m-2 m is number of samples in the data segment The time of the sample is set to the {t(k) + t(k+1)}/2 t(k) is the time of sample k The number of samples in the data segment is reduced with one.

Updated Mar 20, 2009 by Bjørn Lybekk