--- a
+++ b/diagDA.R
@@ -0,0 +1,67 @@
+> diagDA
+function (ls, cll, ts, pool = TRUE) 
+{
+  ls <- data.matrix(ls)
+  n <- nrow(ls)
+  p <- ncol(ls)
+  cl0 <- as.integer(min(cll, na.rm = TRUE) - 1)
+  cll <- as.integer(cll) - cl0
+  inaC <- is.na(cll)
+  clL <- cll[!inaC]
+  K <- max(clL)
+  if (K != length(unique(clL))) 
+    stop(sQuote("cll"), " did not contain *consecutive* integers")
+  nk <- integer(K)
+  m <- v <- matrix(0, p, K)
+  colVars <- function(x, means = colMeans(x, na.rm = na.rm), 
+                      na.rm = FALSE) {
+    x <- sweep(x, 2, means)
+    colSums(x * x, na.rm = na.rm)/(nrow(x) - 1)
+  }
+  sum.na <- function(x) sum(x, na.rm = TRUE)
+  for (k in 1:K) {
+    which <- (cll == k)
+    nk[k] <- sum.na(which)
+    lsk <- ls[which, , drop = FALSE]
+    m[, k] <- colMeans(lsk, na.rm = TRUE)
+    if (nk[k] > 1) 
+      v[, k] <- colVars(lsk, na.rm = TRUE, means = m[, 
+                                                     k])
+  }
+  ts <- data.matrix(ts)
+  if (p != ncol(ts)) 
+    stop("test set matrix must have same columns as learning one")
+  ts <- na.exclude(ts)
+  nt <- nrow(ts)
+  disc <- matrix(0, nt, K)
+  if (pool) {
+    vp <- rowSums(rep(nk - 1, each = p) * v)/(n - K)
+    if (any(i0 <- vp == 0)) 
+      vp[i0] <- 1e-07 * min(vp[!i0])
+    ivp <- rep(1/vp, each = nt)
+    for (k in 1:K) {
+      y <- ts - rep(m[, k], each = nt)
+      disc[, k] <- rowSums(y * y * ivp)
+    }
+  }
+  else {
+    if (FALSE) {
+      for (k in 1:K) {
+        ts <- ts - rep(m[, k], each = nt)
+        disc[, k] <- rowSums((ts * ts)/rep(v[, k], each = nt)) + 
+          sum(log(v[, k]))
+      }
+    }
+    else {
+      for (k in 1:K) {
+        disc[, k] <- apply(ts, 1, function(z) sum((z - 
+                                                     m[, k])^2/v[, k])) + sum.na(log(v[, k]))
+      }
+    }
+  }
+  pred <- cl0 + apply(disc, 1, which.min)
+  if (inherits(attr(ts, "na.action"), "exclude")) 
+    pred <- napredict(omit = attr(ts, "na.action"), pred)
+  pred
+}
+<environment: namespace:sfsmisc>
\ No newline at end of file