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calcualate
2006 Sep 25
4
Beginner question: select cases
Hello all,
I hope i chose the right list as my question is a beginner-question.
I have a data set with 3 colums "London", "Rome" and "Vienna" - the
location is presented through a 1 like this:
London Rome Vienna q1
0 0 1 4
0 1 0 2
1 0 0 3
....
....
....
I just want to calculate the means of a variable q1.
I tried following script:
# calculate the mean
2005 Dec 29
1
use of tapply?
...ta.frame(
x=c(0.230,0.411,0.477,0.241,0.552,0.230),
y=c(0.119,0.515,0.261,0.431,0.304,0.389),
angle=vector(length=6),
length=vector(length=6),
row.names=c('tbr','trg','dbr','dbg','pbr','pbg'))
calcDist<-function(x,y){
#calcualates distance from origin (C)
origin<-data.frame(x=0.34,y=0.36)
dx<-origin$x-x
dy<-origin$y-y
length<-sqrt(dx^2+dy^2)
angle<-asin(dy/length)
return(list('length'=length,'angle'=angle))
}
for(iLoc in 1:length(data.intersects[,1])){
result<-c...