add comon_analysis graph

[monitor.git] / statistics / functions.r

diff --git a/statistics/functions.r b/statistics/functions.r
index bc6b8d4..e02ee67 100644 (file)
--- a/statistics/functions.r
+++ b/statistics/functions.r
@@ -397,10 +397,15 @@ add_timestamp <- function (t)
     return (t);
 }
 
-abline_at_date <- function (date, col='black', lty=1, format="%Y-%m-%d")
+abline_at_date <- function (date, col='black', lty=1, format="%Y-%m-%d", height=0)
 {
     ts <-unclass(as.POSIXct(date, format=format, origin="1970-01-01"))[1]
-    abline(v=ts, col=col, lty=lty)
+    if ( height == 0 )
+    {
+        abline(v=ts, col=col, lty=lty)
+    } else {
+        lines(c(ts,ts),c(0,height), col=col, lty=lty)
+    }
     return (ts);
 }
 
@@ -409,3 +414,9 @@ tstamp <- function (date, format="%Y-%m-%d")
     ts <- unclass(as.POSIXct(date, format=format, origin="1970-01-01"))[1]
     return (ts)
 }
+
+lowess_smooth <- function (x, y, delta=(60*60*24), f=0.02)
+{
+    a<-lowess(x, y, delta=delta, f=f)
+    return (a);
+}