search for: sp_a

...equire to this function? Dataset: RT= R A T W H R1 10 20 20 10 R2 60 20 50 10 R3 45 10 20 50 R4 68 50 20 10 R1 73 20 40 46 R3 25 30 10 54 R3 36 90 20 10 R2 29 10 30 30 # FUNCTION TO CALCULATE THE WEIGHTED AVERAGE FOR A WEIGHTED BY C WA<-function(A,C) { sp_A<-c(A %*% C) sum_C<-sum(C) WA<-sp_A/sum_C return(WA) } I am trying to incorporate the additional step of calculating the weighted average of A,T,W and H for each level of R. Need help with this. Thanks in advance! Raoul -- View this message in...

...N (Sum of N) A SR1 912.0098 102 SR3 896.5294118 85 B SR2 914.3636364 55 SR4 957.1966292 178 (Weighted Average of A for N weights) # FUNCTION TO CALCULATE THE WEIGHTED AVERAGE FOR A WEIGHTED BY N WA<-function(A,N) { sp_A<-c(A %*% N) sum_N<-sum(N) WA<-sp_A/sum_N return(WA) } Thanks in advance! Raoul -- View this message in context: http://r.789695.n4.nabble.com/Weighted-Average-application-on-Summary-Dataset-tp2253239p2253239.html Sent from the R help maili...

Hi, I?m trying to make a barplot with the following dataframe, with information on relative frequency per sediment type (ST) for some species: Species ST1 ST2 ST3 SP_A 10 60 30 ... At x-axis are (should be ...) the species names and at y-axis the frequency per sediment, in stacked bars. I tried to use barplot command but with no results. Could anyone help me on this? Thanks in advance, Samantha ------------------------------------------------- We...