Hi all,
I have a data frame with some measured values of some animals. Sometimes the
measurement failed, resulting in a NA for a measurement and sometimes the
animal died, resulting in NA for all measurements.
I have several groups of animals. How do I find the size of each group with
only alive animals? And how do I find the size of the groups for each
measurement?
An example:
l1 <- list(factor=c(24,24,24), val1=c(2, 3, NA), val2=c(4, NA, NA))
df <- as.data.frame(l1)
df$factor <- factor(df$factor)
The size of factors should be 2 and not 3. The number of measurement in
val1 should be 2 and the number of measurements in val2 should be 1
Thanks in advance for any help and suggestions
Ulrik
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