1 files changed, 5 insertions, 0 deletions
diff --git a/R/DFOP.R b/R/DFOP.R
new file mode 100644
index 0000000..4cac735
--- /dev/null
+++ b/R/DFOP.R
@@ -0,0 +1,5 @@
+DFOP <- function(t, parent.0, k1, k2, g)
+{
+	parent = g * parent.0 * exp(-k1 * t) +
+		 (1 - g) * parent.0 * exp(-k2 * t)
+}