1 files changed, 28 insertions, 0 deletions
diff --git a/noao/onedspec/ecidentify/ecrms.x b/noao/onedspec/ecidentify/ecrms.x
new file mode 100644
index 00000000..de84ae26
--- /dev/null
+++ b/noao/onedspec/ecidentify/ecrms.x
@@ -0,0 +1,28 @@
+include	"ecidentify.h"
+
+# EC_RMS -- Compute RMS of fit about the user coordinates
+
+double procedure ec_rms (ec)
+
+pointer	ec			# ID pointer
+
+int	i, nrms
+double	rms
+
+begin
+	rms = 0.
+	nrms = 0
+	for (i=1; i<=EC_NFEATURES(ec); i=i+1) {
+	    if (!IS_INDEFD (USER(ec,i)) && FTYPE(ec,i) > 0) {
+		rms = rms + (FIT(ec,i) - USER(ec,i)) ** 2
+		nrms = nrms + 1
+	    }
+	}
+
+	if (nrms > 0)
+	    rms = sqrt (rms / nrms)
+	else
+	    rms = INDEFD
+
+	return (rms)
+end