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> ################################################################################
> ##
> ## $Id: portfolioBasic.Arith.test.R 406 2007-04-19 16:30:22Z enos $
> ##
> ## Tests "+" method of "portfolioBasic"
> ##
> ################################################################################
> 
> library(portfolio)
Loading required package: grid
Loading required package: lattice
> 
> load("portfolioBasic.Arith.test.RData")
> 
> ## save(p.0, p.1, truth, file = "portfolioBasic.Arith.test.RData", compress = TRUE)
> 
> ## Constructs data and portfolioBasics that should add ("+") correctly
> 
> data.0 <- data.frame(id = as.character(letters[1:20]), in.var = 1:20)
> data.1 <- data.frame(id = as.character(letters[26:7]), in.var = 20:1)
> 
> p.0 <- new("portfolioBasic", id.var = "id", symbol.var = "symbol.var",
+               in.var = "in.var", ret.var = "ret.var", type = "sigmoid",
+               size = 10, data = data.0, sides = c("long", "short"))
> 
> p.1 <- new("portfolioBasic", id.var = "id", symbol.var = "symbol.var",
+               in.var = "in.var", ret.var = "ret.var", type = "linear",
+               size = 8, data = data.1, sides = c("long", "short"))
> 
> p.0@data$id <- as.character(p.0@data$id)
> p.1@data$id <- as.character(p.1@data$id)
> 
> p.0@weights$id <- as.character(p.0@weights$id)
> p.1@weights$id <- as.character(p.1@weights$id)
> 
> p.sum <- p.0 + p.1
> 
> stopifnot(
+           isTRUE(all.equal(p.sum, truth)),
+           nrow(p.sum@data) == length(union(p.0@data$id, p.1@data$id))
+           )
> 
> 
> p.pos <- p.0
> 
> p.neg <- p.0
> p.neg@weights$weight <- -1 * p.neg@weights$weight
> 
> p.sum <- p.pos + p.neg
> 
> stopifnot(validObject(p.sum, test = TRUE),
+           nrow(p.sum@weights) == 0)
> 
> proc.time()
   user  system elapsed 
   0.53    0.10    0.62