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freequency
2010 May 26
2
sequential treatment of a vector for formula
Please pardon the simplicity of this question of biological nature.
I'm trying to calculate a statistic, px, the proportion of a cohort
that survives through the interval x:x+1. I have the vector from
which the calc is to be made but I can't figure out how to tell R to
take the current value and divide it by the next value.
The formula is P0=L1/LO
The following is an example of the