X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=R%2FrTrait.R;h=b87dd6f8a60ff023271acfb1339c36fdc53d190e;hb=3f91879755fdbbe39cfd936495b2985fa4621615;hp=3359df6f71da40c3b8a5d7a254844bafb50b79e3;hpb=24fc6c03893f85a3f9ab3d088201b3731f3035b4;p=ape.git

diff --git a/R/rTrait.R b/R/rTrait.R
index 3359df6..b87dd6f 100644
--- a/R/rTrait.R
+++ b/R/rTrait.R
@@ -1,4 +1,4 @@
-## rTrait.R (2010-01-11)
+## rTrait.R (2010-12-24)
 
 ##   Trait Evolution
 
@@ -10,7 +10,7 @@
 rTraitDisc <-
     function(phy, model = "ER", k = if (is.matrix(model)) ncol(model) else 2,
              rate = 0.1, states = LETTERS[1:k], freq = rep(1/k, k),
-             ancestor = FALSE, root.value = 1)
+             ancestor = FALSE, root.value = 1, ...)
 {
     if (is.null(phy$edge.length))
         stop("tree has no branch length")
@@ -18,7 +18,7 @@ rTraitDisc <-
         stop("at least one branch length negative")
 
     if (is.character(model)) {
-        switch(model, "ER" = {
+        switch(toupper(model), "ER" = {
                    if (length(rate) != 1)
                        stop("`rate' must have one element")
                    Q <- matrix(rate, k, k)
@@ -56,11 +56,14 @@ rTraitDisc <-
 
     if (is.function(model)) {
         environment(model) <- environment() # to find 'k'
-        for (i in N:1) x[des[i]] <- model(x[anc[i]], el[i])
+        for (i in N:1) x[des[i]] <- model(x[anc[i]], el[i], ...)
     } else {
+        freq <- rep(freq, each = k)
+        Q <- Q * freq
+        diag(Q) <- 0
         diag(Q) <- -rowSums(Q)
         for (i in N:1) {
-            p <- matexpo(Q * freq * el[i])[x[anc[i]], ]
+            p <- matexpo(Q * el[i])[x[anc[i]], ]
             x[des[i]] <- .Internal(sample(k, size = 1, FALSE, prob = p))
         }
     }
@@ -78,8 +81,8 @@ rTraitDisc <-
 }
 
 rTraitCont <-
-    function(phy, model = "BM", sigma = 0.1, alpha = 1,
-             theta = 0, ancestor = FALSE, root.value = 0)
+    function(phy, model = "BM", sigma = 0.1, alpha = 1, theta = 0,
+             ancestor = FALSE, root.value = 0, linear = TRUE, ...)
 {
     if (is.null(phy$edge.length))
         stop("tree has no branch length")
@@ -99,9 +102,9 @@ rTraitCont <-
 
     if (is.function(model)) {
         environment(model) <- environment()
-        for (i in N:1) x[des[i]] <- model(x[anc[i]], el[i])
+        for (i in N:1) x[des[i]] <- model(x[anc[i]], el[i], ...)
     } else {
-        model <- pmatch(model, c("BM", "OU"))
+        model <- pmatch(toupper(model), c("BM", "OU"))
         if (length(sigma) == 1) sigma <- rep(sigma, N)
         else if (length(sigma) != N)
             stop("'sigma' must have one or Nedge(phy) elements")
@@ -112,6 +115,7 @@ rTraitCont <-
             if (length(theta) == 1) theta <- rep(theta, N)
             else if (length(theta) != N)
                 stop("'theta' must have one or Nedge(phy) elements")
+            if (!linear) model <- model + 1L
         }
         .C("rTraitCont", as.integer(model), as.integer(N), as.integer(anc - 1L), as.integer(des - 1L), el, sigma, alpha, theta, x, DUP = FALSE, NAOK = TRUE, PACKAGE = "ape")
     }