search for: point1

...(8, 39) 5 5 (10, 17) 6 6 (35, 20) 7 7 (38, 10) > str (DSi) 'data.frame': 7 obs. of 2 variables: $ i : int 1 2 3 4 5 6 7 $ Si: Factor w/ 7 levels "(10, 17)","(20, 2)",..: 6 2 3 7 1 4 5 > > x <- c(15, 45) > y <- DSi [,2] > dist <- function (point1, point2) + { + diff <- point1-point2 + distance <- sqrt(sum(diff^2)) + distance + } > dist (x, y) [1] NA Warning message: In Ops.factor(point1, point2) : - not meaningful for factors > Regards, Nadiah -- View this message in context: http://r.789695.n4.nabble.com/Ops-factor-point1-...

Hello, I am trying to convert list of pairwise distances to a distance matrix for spatial analysis (kriging). For instance, I have something like this for each pair pf points, and I want to convert it to a matrix: point1 point2 distance 1 1 0 1 2 4 2 2 0 2 1 4 Please let me know if there is a function or method that can do this. Thanks, Christy [[alternative HTML version deleted]]

Hi there, I'd like to plot a triangle with each point having a certain color defined and fill it with the interpolated values. The following code shall represent somehow, three points with x,y, and the "amount" of red for example... point1 <- c(1.1, 1.7, 255) point2 <- c(2.2, 1.5, 180) point3 <- c(1.8, 2.2, 60) can anybody give me a hint which methods to use to realize it? Antje

Dear R, I have a bunch of geographic locations specified by lat-long coordinates. What's an easy way to calculate geographic distance between any two points? OR, perhaps there is a function for calculating a distance matrix for K sites? Sincerely, Scott Chamberlain [[alternative HTML version deleted]]