Displaying 2 results from an estimated 2 matches for "1717l".
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1717
2013 Jan 16
1
Mean calculation by two variables
...t (unique (ID)) to calculate the mean of each food item
for each specie:
step2 = ddply (step1, .(Specie, Food.item), summarise, MWi = sum
(Wi)/length (unique(ID)))
I do not understand why this didn't work. Someone can help me?
Thanks in advanced!
*EXAMPLE*
structure(list(ID = c(779L, 782L, 1717L, 1717L, 1717L, 1803L,
2650L, 2650L, 2700L, 2700L, 3611L, 3613L, 3647L, 3654L, 3654L,
3683L, 3683L, 3683L, 3685L, 3997L), Site = c("Três Marias", "Três Marias",
"Nova Ponte", "Nova Ponte", "Nova Ponte", "Três Marias", "São Simão",...
2012 Jul 10
2
estimation of NA by predict command
...cant figure out the way to write the coding for that. Could you please help me on that???
I have also ,written below, the exact dput of my file.
Thnx in advance.
> dput(eliza)
structure(list(Year = structure(c(1L, 133L, 265L, 397L, 529L,
661L, 793L, 925L, 1057L, 1189L, 1321L, 1453L, 1585L, 1717L, 1849L,
1981L, 2113L, 2245L, 2377L, 2509L, 2641L, 2773L, 2905L, 3037L,
3169L, 3301L, 3433L, 3565L, 3697L, 3820L, 3941L, 12L, 144L, 276L,
408L, 540L, 672L, 804L, 936L, 1068L, 1200L, 1332L, 1464L, 1596L,
1728L, 1860L, 1992L, 2124L, 2256L, 2388L, 2520L, 2652L, 2784L,
2916L, 3048L, 3180L, 3312L, 3...