ready for graphing

sql/condition-glucose-grafana.sql

@@ -26,8 +26,22 @@ FROM generate_series($__timeFrom(), $__timeTo(), '1 minute'::interval) AS ts
     LIMIT 1
 ) AS gi_next ON true
 WHERE gi_prev.time IS NOT NULL and gi_next.time IS NOT NULL AND gi_next.time <> gi_prev.time
-)
+), collected AS (
 SELECT ts as time,
-	public.ema(samp_value ::real, 0.33) over (order by ts asc) as smoothval,
+	ema(samp_value ::real, 0.33) over (order by ts asc) as smoothval,
   samp_value as absvalue
-FROM coallated;
+FROM coallated), firstorder AS (
+SELECT time, smoothval, absvalue,
+   smoothval - LAG (smoothval, 1) OVER (ORDER BY time ASC) as delta1st
+ FROM collected), secondorder AS (
+ SELECT 
+   time, 
+   smoothval, 
+   absvalue,
+   delta1st,
+   delta1st - LAG(delta1st, 1) OVER (ORDER BY time ASC) as delta2nd
+ FROM firstorder)
+ SELECT *, 
+        ema(delta1st, 0.25) OVER (ORDER BY time ASC) as smoothdelta1st,
+        ema(delta2nd, 0.25) OVER (ORDER BY time ASC) as smoothdelta2nd
+ FROM secondorder;