Calculate 15 min Moving Average for 1 min data

[Kolumam]

Hi All, 

I want to calculate the 15 min moving average for the below data. Can you please help? Also, it should calculate only for the present day. Please help.

[AlB]

Hi @Kolumam 

Try a calculated column as below. You don't provide data in a format that can be copied, so i haven't tested it.

Please always show your sample data in text-tabular format in addition to (or instead of) the screen captures. That allows people trying to help to readily copy the data and run a quick test, plus it increases the likelihood of your question being answered. Just use 'Copy table' in Power BI and paste it here. Or, ideally, share the pbix (beware of confidential data). 

NewColumn =
VAR MinsInWindow_ = 15 //Change window lenght as required (in minutes)
VAR HigherEnd_ = Table1[Time Stamp]
VAR LowerEnd_ = HigherEnd_ - MinsInWindow_ / ( 24 * 60 )
RETURN
    CALCULATE (
        AVERAGE ( Table1[PR] ),
        Table1[Time Stamp] <= HigherEnd_,
        Table1[Time Stamp] > LowerEnd_,
        ALL ( Table1 )
    )

[Kolumam]

Hi @AlB 

Thank you for your answer. Please find the below sample data. Could you please help your code with the help of comments as I am finding it difficult to understand. I am using direct query so probably cannot use functions such as MAX/CALCULATE/AVERAGE.

---

Time Stamp	PR
19/8/2019 5:47	400.00%
19/8/2019 5:48	38.50%
19/8/2019 5:49	25.00%
19/8/2019 5:51	111.10%
19/8/2019 5:52	55.60%
19/8/2019 5:53	133.30%
19/8/2019 5:54	230.80%
19/8/2019 5:55	100.00%
19/8/2019 5:56	39.20%
19/8/2019 5:57	100.00%
19/8/2019 5:58	80.70%
19/8/2019 5:59	75.80%
19/8/2019 6:00	97.80%
19/8/2019 6:01	75.40%
19/8/2019 6:02	78.90%
19/8/2019 6:03	81.80%
19/8/2019 6:04	87.30%
19/8/2019 6:05	84.20%
19/8/2019 6:06	83.20%
19/8/2019 6:07	92.40%
19/8/2019 6:08	92.80%
19/8/2019 6:09	96.80%
19/8/2019 6:10	92.40%
19/8/2019 6:11	88.90%
19/8/2019 6:12	88.60%
19/8/2019 6:13	88.90%
19/8/2019 6:14	89.40%
19/8/2019 6:15	83.90%
19/8/2019 6:16	78.70%
19/8/2019 6:17	89.60%
19/8/2019 6:18	93.90%
19/8/2019 6:19	89.80%
19/8/2019 6:20	102.00%
19/8/2019 6:21	99.40%
19/8/2019 6:22	103.50%
19/8/2019 6:23	100.70%
19/8/2019 6:24	97.40%
19/8/2019 6:25	107.00%
19/8/2019 6:26	105.60%
19/8/2019 6:27	108.50%
19/8/2019 6:28	107.00%
19/8/2019 6:29	104.10%
19/8/2019 6:30	104.80%
19/8/2019 6:31	103.30%
19/8/2019 6:32	108.30%
19/8/2019 6:33	109.30%
19/8/2019 6:34	107.50%
19/8/2019 6:35	103.40%
19/8/2019 6:36	108.30%
19/8/2019 6:37	111.40%
19/8/2019 6:38	106.30%
19/8/2019 6:39	104.30%
19/8/2019 6:40	103.70%
19/8/2019 6:41	105.50%
19/8/2019 6:42	104.00%
19/8/2019 6:43	99.40%
19/8/2019 6:44	103.40%
19/8/2019 6:45	105.60%
19/8/2019 6:46	107.60%
19/8/2019 6:47	104.00%
19/8/2019 6:48	106.90%
19/8/2019 6:49	106.90%
19/8/2019 6:50	112.20%
19/8/2019 6:51	103.10%
19/8/2019 6:52	104.80%
19/8/2019 6:53	103.30%
19/8/2019 6:54	103.50%
19/8/2019 6:55	102.80%
19/8/2019 6:56	100.40%
19/8/2019 6:57	100.50%
19/8/2019 6:58	99.30%
19/8/2019 6:59	99.90%
19/8/2019 7:00	99.80%
19/8/2019 7:01	91.90%
19/8/2019 7:02	97.10%
19/8/2019 7:03	97.80%
19/8/2019 7:04	96.40%
19/8/2019 7:05	95.70%
19/8/2019 7:06	100.80%
19/8/2019 7:07	94.60%
19/8/2019 7:08	94.60%
19/8/2019 7:09	95.20%
19/8/2019 7:10	95.10%
19/8/2019 7:11	94.20%
19/8/2019 7:12	91.20%
19/8/2019 7:13	92.70%
19/8/2019 7:14	92.00%
19/8/2019 7:15	85.70%
19/8/2019 7:16	89.60%
19/8/2019 7:17	91.00%
19/8/2019 7:18	90.00%
19/8/2019 7:19	90.20%
19/8/2019 7:20	88.70%
19/8/2019 7:21	94.00%
19/8/2019 7:22	89.00%
19/8/2019 7:23	89.20%
19/8/2019 7:24	88.70%
19/8/2019 7:25	87.70%
19/8/2019 7:26	80.80%
19/8/2019 7:27	87.90%
19/8/2019 7:28	87.50%
19/8/2019 7:29	87.30%
19/8/2019 7:30	85.30%
19/8/2019 7:31	87.10%
19/8/2019 7:32	90.70%
19/8/2019 7:33	85.20%
19/8/2019 7:34	84.80%
19/8/2019 7:35	84.80%
19/8/2019 7:36	84.70%
19/8/2019 7:37	84.20%
19/8/2019 7:38	78.20%
19/8/2019 7:39	82.60%
19/8/2019 7:40	83.10%
19/8/2019 7:41	83.20%
19/8/2019 7:42	83.00%
19/8/2019 7:43	88.60%
19/8/2019 7:44	82.50%
19/8/2019 7:45	81.50%
19/8/2019 7:46	82.20%
19/8/2019 7:47	76.20%
19/8/2019 7:48	82.30%
19/8/2019 7:49	82.40%
19/8/2019 7:50	81.70%
19/8/2019 7:51	81.30%
19/8/2019 7:52	87.60%
19/8/2019 7:53	81.20%
19/8/2019 7:54	81.50%
19/8/2019 7:55	80.80%
19/8/2019 7:56	82.90%
19/8/2019 7:57	92.50%
19/8/2019 7:58	123.70%
19/8/2019 7:59	182.90%
19/8/2019 8:00	296.20%
19/8/2019 8:01	267.30%
19/8/2019 8:02	166.70%
19/8/2019 8:03	109.70%
19/8/2019 8:04	93.40%
19/8/2019 8:05	74.90%
19/8/2019 8:06	84.20%
19/8/2019 8:07	79.30%
19/8/2019 8:08	78.80%
19/8/2019 8:09	80.00%
19/8/2019 8:10	79.70%
19/8/2019 8:11	81.10%
19/8/2019 8:12	80.10%
19/8/2019 8:13	79.80%
19/8/2019 8:14	73.80%
19/8/2019 8:15	65.10%
19/8/2019 8:16	75.50%
19/8/2019 8:17	86.70%
19/8/2019 8:18	75.80%
19/8/2019 8:19	86.80%
19/8/2019 8:20	79.80%
19/8/2019 8:21	65.80%
19/8/2019 8:22	70.50%
19/8/2019 8:23	66.10%
19/8/2019 8:24	57.40%
19/8/2019 8:25	66.70%
19/8/2019 8:26	155.90%
19/8/2019 8:27	80.50%
19/8/2019 8:28	248.80%
19/8/2019 8:29	262.80%
19/8/2019 8:30	225.50%
19/8/2019 8:31	69.20%
19/8/2019 8:32	54.40%
19/8/2019 8:33	56.70%
19/8/2019 8:34	113.50%
19/8/2019 8:35	103.60%
19/8/2019 8:36	147.40%
19/8/2019 8:37	51.80%
19/8/2019 8:38	55.50%
19/8/2019 8:39	171.00%
19/8/2019 8:40	246.30%
19/8/2019 8:41	59.90%
19/8/2019 8:42	64.20%
19/8/2019 8:43	69.00%
19/8/2019 8:44	77.90%
19/8/2019 8:45	78.20%
19/8/2019 8:46	77.20%
19/8/2019 8:47	75.90%
19/8/2019 8:48	73.30%
19/8/2019 8:49	70.80%
19/8/2019 8:50	74.60%
19/8/2019 8:51	74.50%
19/8/2019 8:52	76.90%
19/8/2019 8:53	76.50%
19/8/2019 8:54	86.30%
19/8/2019 8:55	77.70%
19/8/2019 8:56	76.10%
19/8/2019 8:57	66.00%
19/8/2019 8:58	68.70%
19/8/2019 8:59	74.90%
19/8/2019 9:00	73.30%
19/8/2019 9:01	75.40%
19/8/2019 9:02	76.80%
19/8/2019 9:03	72.60%
19/8/2019 9:04	78.90%
19/8/2019 9:05	74.20%
19/8/2019 9:06	76.90%
19/8/2019 9:07	75.80%
19/8/2019 9:08	82.40%
19/8/2019 9:09	60.70%
19/8/2019 9:10	55.90%
19/8/2019 9:11	46.10%
19/8/2019 9:12	43.60%
19/8/2019 9:13	60.40%
19/8/2019 9:14	68.10%
19/8/2019 9:15	75.60%
19/8/2019 9:16	120.20%
19/8/2019 9:17	218.30%
19/8/2019 9:18	73.70%
19/8/2019 9:19	65.90%
19/8/2019 9:20	68.00%
19/8/2019 9:21	77.40%
19/8/2019 9:22	77.00%
19/8/2019 9:23	76.10%
19/8/2019 9:24	64.60%
19/8/2019 9:25	64.50%
19/8/2019 9:26	73.00%
19/8/2019 9:27	78.10%
19/8/2019 9:28	74.60%
19/8/2019 9:29	85.60%
19/8/2019 9:30	76.50%
19/8/2019 9:31	72.40%
19/8/2019 9:32	69.60%
19/8/2019 9:33	61.20%
19/8/2019 9:34	59.10%
19/8/2019 9:35	46.20%
19/8/2019 9:36	52.90%
19/8/2019 9:37	87.00%
19/8/2019 9:38	76.00%
19/8/2019 9:39	73.50%
19/8/2019 9:40	73.20%
19/8/2019 9:41	72.70%
19/8/2019 9:42	74.60%
19/8/2019 9:43	68.70%
19/8/2019 9:44	68.40%
19/8/2019 9:45	65.30%
19/8/2019 9:46	85.10%
19/8/2019 9:47	103.00%
19/8/2019 9:48	110.00%
19/8/2019 9:49	87.60%
19/8/2019 9:50	58.70%
19/8/2019 9:51	47.70%
19/8/2019 9:52	69.20%
19/8/2019 9:53	74.80%
19/8/2019 9:54	69.80%
19/8/2019 9:55	63.70%
19/8/2019 9:56	63.30%
19/8/2019 9:57	72.40%
19/8/2019 9:58	71.50%
19/8/2019 9:59	71.10%
19/8/2019 10:00	80.00%
19/8/2019 10:01	108.20%
19/8/2019 10:02	63.20%
19/8/2019 10:03	45.10%
19/8/2019 10:04	46.10%
19/8/2019 10:05	47.90%
19/8/2019 10:06	76.80%
19/8/2019 10:09	287.40%
19/8/2019 10:10	62.30%
19/8/2019 10:11	66.00%
19/8/2019 10:12	70.00%
19/8/2019 10:13	68.00%
19/8/2019 10:14	73.20%
19/8/2019 10:15	73.70%
19/8/2019 10:16	73.50%
19/8/2019 10:17	71.80%
19/8/2019 10:18	67.10%
19/8/2019 10:19	71.50%
19/8/2019 10:20	65.10%
19/8/2019 10:21	66.20%
19/8/2019 10:22	61.40%
19/8/2019 10:23	101.60%
19/8/2019 10:24	188.70%
19/8/2019 10:25	160.60%
19/8/2019 10:26	82.70%
19/8/2019 10:27	65.70%
19/8/2019 10:28	65.60%
19/8/2019 10:29	68.20%
19/8/2019 10:30	65.10%
19/8/2019 10:31	47.60%
19/8/2019 10:32	54.70%
19/8/2019 10:33	66.70%
19/8/2019 10:34	55.80%
19/8/2019 10:35	82.40%
19/8/2019 10:36	73.80%
19/8/2019 10:37	161.30%
19/8/2019 10:38	139.90%
19/8/2019 10:39	151.30%
19/8/2019 10:40	176.90%
19/8/2019 10:41	120.40%
19/8/2019 10:42	64.90%
19/8/2019 10:43	60.80%
19/8/2019 10:44	54.00%
19/8/2019 10:45	56.70%
19/8/2019 10:46	76.10%
19/8/2019 10:47	68.30%
19/8/2019 10:48	70.80%
19/8/2019 10:49	71.70%
19/8/2019 10:50	65.20%
19/8/2019 10:51	51.50%
19/8/2019 10:52	63.70%
19/8/2019 10:53	76.00%
19/8/2019 10:54	69.80%
19/8/2019 10:55	70.30%
19/8/2019 10:56	70.20%
19/8/2019 10:57	70.50%
19/8/2019 10:58	66.30%
19/8/2019 10:59	70.70%
19/8/2019 11:00	68.60%
19/8/2019 11:01	69.40%
19/8/2019 11:02	74.30%
19/8/2019 11:03	71.20%
19/8/2019 11:04	73.40%
19/8/2019 11:05	69.70%
19/8/2019 11:06	55.40%
19/8/2019 11:07	50.50%
19/8/2019 11:08	59.10%
19/8/2019 11:09	68.50%
19/8/2019 11:10	67.20%
19/8/2019 11:11	64.40%
19/8/2019 11:12	65.90%
19/8/2019 11:13	69.20%
19/8/2019 11:14	69.90%
19/8/2019 11:15	69.00%
19/8/2019 11:16	66.10%
19/8/2019 11:17	61.30%
19/8/2019 11:18	68.70%
19/8/2019 11:19	72.30%
19/8/2019 11:20	57.00%
19/8/2019 11:21	63.70%
19/8/2019 11:22	73.10%
19/8/2019 11:23	58.70%
19/8/2019 11:24	60.90%
19/8/2019 11:25	77.40%
19/8/2019 11:26	81.20%
19/8/2019 11:27	61.90%
19/8/2019 11:28	65.60%
19/8/2019 11:29	59.00%
19/8/2019 11:30	57.90%
19/8/2019 11:31	62.10%
19/8/2019 11:32	65.20%
19/8/2019 11:33	71.40%
19/8/2019 11:34	62.10%
19/8/2019 11:35	85.50%
19/8/2019 11:36	151.80%
19/8/2019 11:37	81.80%
19/8/2019 11:38	65.80%
19/8/2019 11:39	43.30%
19/8/2019 11:40	70.40%
19/8/2019 11:41	109.40%
19/8/2019 11:42	98.20%
19/8/2019 11:43	61.90%
19/8/2019 11:44	78.20%
19/8/2019 11:45	198.20%
19/8/2019 11:46	55.30%
19/8/2019 11:47	57.80%
19/8/2019 11:48	86.20%
19/8/2019 11:49	65.10%
19/8/2019 11:50	77.50%
19/8/2019 11:51	90.20%
19/8/2019 11:52	119.20%
19/8/2019 11:53	57.20%
19/8/2019 11:54	61.20%
19/8/2019 11:55	68.70%
19/8/2019 11:56	70.70%
19/8/2019 11:57	70.30%
19/8/2019 11:58	74.50%
19/8/2019 11:59	69.40%
19/8/2019 12:00	70.00%
19/8/2019 12:01	70.20%
19/8/2019 12:02	69.80%
19/8/2019 12:03	69.50%
19/8/2019 12:04	66.50%
19/8/2019 12:05	62.80%
19/8/2019 12:06	69.30%
19/8/2019 12:07	69.30%
19/8/2019 12:08	66.30%
19/8/2019 12:09	64.50%
19/8/2019 12:10	66.80%
19/8/2019 12:11	51.80%
19/8/2019 12:12	66.30%
19/8/2019 12:13	68.50%
19/8/2019 12:14	60.80%
19/8/2019 12:15	46.60%
19/8/2019 12:16	55.90%
19/8/2019 12:17	51.70%
19/8/2019 12:18	75.00%
19/8/2019 12:19	85.90%
19/8/2019 12:20	137.20%
19/8/2019 12:21	123.30%
19/8/2019 12:22	56.00%
19/8/2019 12:23	52.60%
19/8/2019 12:24	64.10%
19/8/2019 12:25	39.90%
19/8/2019 12:26	66.40%
19/8/2019 12:27	66.10%
19/8/2019 12:28	65.50%
19/8/2019 12:29	42.00%
19/8/2019 12:30	46.40%
19/8/2019 12:31	52.10%
19/8/2019 12:32	64.90%
19/8/2019 12:33	52.10%
19/8/2019 12:34	69.20%
19/8/2019 12:35	66.30%
19/8/2019 12:36	62.50%
19/8/2019 12:37	63.60%
19/8/2019 12:38	58.10%
19/8/2019 12:39	89.80%
19/8/2019 12:40	73.10%
19/8/2019 12:41	53.00%
19/8/2019 12:42	60.90%
19/8/2019 12:43	78.70%
19/8/2019 12:44	129.00%
19/8/2019 12:45	72.50%
19/8/2019 12:46	124.10%
19/8/2019 12:47	115.00%
19/8/2019 12:48	146.80%
19/8/2019 12:49	92.90%
19/8/2019 12:50	69.60%
19/8/2019 12:51	49.40%
19/8/2019 12:52	45.60%
19/8/2019 12:53	76.20%
19/8/2019 12:54	60.80%
19/8/2019 12:55	47.30%
19/8/2019 12:56	49.40%
19/8/2019 12:57	80.00%
19/8/2019 12:58	59.60%
19/8/2019 12:59	52.80%
19/8/2019 13:00	42.20%
19/8/2019 13:01	48.70%
19/8/2019 13:02	45.40%
19/8/2019 13:03	49.20%
19/8/2019 13:04	72.40%
19/8/2019 13:05	59.80%
19/8/2019 13:06	72.70%
19/8/2019 13:07	99.70%
19/8/2019 13:08	92.30%
19/8/2019 13:09	41.70%
19/8/2019 13:10	50.70%
19/8/2019 13:11	50.50%
19/8/2019 13:12	68.50%
19/8/2019 13:13	109.50%
19/8/2019 13:14	110.50%
19/8/2019 13:15	75.80%
19/8/2019 13:16	63.10%
19/8/2019 13:17	65.70%
19/8/2019 13:18	60.30%
19/8/2019 13:19	65.00%
19/8/2019 13:20	52.00%
19/8/2019 13:21	54.50%
19/8/2019 13:22	53.70%
19/8/2019 13:23	67.30%
19/8/2019 13:24	62.60%
19/8/2019 13:25	64.80%
19/8/2019 13:26	79.30%
19/8/2019 13:27	50.90%
19/8/2019 13:28	64.90%
19/8/2019 13:29	56.40%
19/8/2019 13:30	48.20%
19/8/2019 13:31	59.20%

[AlB · Accepted solution]

I'm not too familiar with Direct Query or its limitations. If you want a measure, I guess you could place

Table1[Timestamp] in the x axis of a chart and modify the previous code to use as measure. 

Measure =
VAR MinsInWindow_ = 15 //Change window lenght as required (in minutes)
VAR HigherEnd_ = SELECTEDVALUE(Table1[Time Stamp])  //Read the current time. That's the higher end of the window for the averaging.
VAR LowerEnd_ = HigherEnd_ - MinsInWindow_ / ( 24 * 60 ) // Determine the lower end of the window 1/(24*60) represents one minute)

RETURN
    CALCULATE (    //Calculate the average in the 15 min window
        AVERAGE ( Table1[PR] ),
        Table1[Time Stamp] <= HigherEnd_,
        Table1[Time Stamp] > LowerEnd_,
        ALL ( Table1 )
    )