Index: /branches/eam_branches/ohana.20170822/src/opihi/cmd.data/test/periodogram.sh
===================================================================
--- /branches/eam_branches/ohana.20170822/src/opihi/cmd.data/test/periodogram.sh	(revision 40142)
+++ /branches/eam_branches/ohana.20170822/src/opihi/cmd.data/test/periodogram.sh	(revision 40143)
@@ -110,4 +110,151 @@
 end
 
+# test using random samples, offset start, non-zero DC
+macro test5
+ $PASS = 1
+ break -auto off
+
+ local P PI
+ $PI = 3.14159265359
+ $P  = 15.0
+
+ delete -q x t f period power
+
+ create x 500 800
+ set t = 300 * rnd(x) + 500
+ set f = sin(2*$PI*t/$P) + 0.5
+
+ periodogram t f 2 30 period power
+
+#  lim -n 0 t f; clear; box; plot -x 2 -pt 2 t f
+#  lim -n 1 period power; clear; box; plot period power
+
+ peak -q period power
+
+ if (abs ($peakpos - $P) > 0.05)
+   $PASS = 0
+ end
+end
+
+# test using random samples, offset start, non-zero DC, some noise
+macro test6
+ $PASS = 1
+ break -auto off
+
+ local P PI
+ $PI = 3.14159265359
+ $P  = 15.0
+
+ delete -q x t f period power
+
+ create x 500 800
+ set t = 300 * rnd(x) + 500
+ set fraw = sin(2*$PI*t/$P) + 0.5
+
+ # 0.05 : peakpos = 14.95
+ # 0.10 : peakpos = 15.04 (
+ gaussdev df t[] 0.0 0.25
+ set f = fraw + df
+
+ periodogram t f 2 30 period power
+
+#  lim -n 0 t f; clear; box; plot -x 2 -pt 2 t f
+#  lim -n 1 period power; clear; box; plot period power
+
+ peak -q period power
+
+ if (abs ($peakpos - $P) > 0.05)
+   $PASS = 0
+ end
+end
+
+# test using fewer random samples, offset start, non-zero DC, some noise
+macro test7
+ $PASS = 1
+ break -auto off
+
+ local P PI
+ $PI = 3.14159265359
+ $P  = 15.0
+
+ delete -q x t f period power
+
+ create x 0 100
+ set t = 100 * rnd(x)
+ set fraw = sin(2*$PI*t/$P) + 0.5
+
+ # 0.05 : peakpos = 14.95
+ # 0.10 : peakpos = 15.04 (
+ gaussdev df t[] 0.0 0.25
+ set f = fraw + df
+
+ periodogram t f 2 30 period power
+
+#  lim -n 0 t f; clear; box; plot -x 2 -pt 2 t f
+#  lim -n 1 period power; clear; box; plot period power
+
+ peak -q period power
+
+ if (abs ($peakpos - $P) > 0.05)
+   $PASS = 0
+ end
+end
+
+# test using fewer random samples, high frequency, non-zero DC, some noise
+macro test8
+ if ($0 != 2)
+   echo "USAGE: test8: Ndays")
+   break
+ end
+ 
+ local Ndays 
+ $Ndays = $1
+
+ $PASS = 1
+ break -auto off
+
+ local P PI
+ $PI = 3.14159265359
+ $P  = 0.8*rnd(0) + 0.2
+ $trueP = $P
+
+ delete -q x t f period power
+
+ create x 0 $Ndays
+
+ # t is a time in days, but we always have 4 within 1 hour:
+ set t0 = int(100 * rnd(x))
+ set dtx = (3/24) * rnd(x)
+ set t0 = t0 + dtx
+
+ set dt1 = (15.0 / 1440) * rnd(x) + ( 0 + 7.5) / 1440
+ set dt2 = (15.0 / 1440) * rnd(x) + (15 + 7.5) / 1440
+ set dt3 = (15.0 / 1440) * rnd(x) + (30 + 7.5) / 1440
+
+ delete -q t
+ concat t0 t
+ set tmp = t0 + dt1; concat tmp t
+ set tmp = t0 + dt2; concat tmp t
+ set tmp = t0 + dt3; concat tmp t
+
+ set fraw = sin(2*$PI*t/$P) + 0.5
+
+ # 0.05 : peakpos = 14.95
+ # 0.10 : peakpos = 15.04 (
+ gaussdev df t[] 0.0 0.25
+ set f = fraw + df
+
+ periodogram t f 0.1 2.0 period power
+
+#  lim -n 0 t f; clear; box; plot -x 2 -pt 2 t f
+#  lim -n 1 period power; clear; box; plot period power
+
+ peak -q period power
+
+ if (abs ($peakpos - $P) > 0.05)
+   $PASS = 0
+ end
+end
+
 # Memory test
 macro memtest1