Я пытаюсь извлечь значения в большом фрейме данных (с поминутными данными), где я хочу получить подмножество фрейма данных, когда переменная x имеет дневной минимум и максимум.
Для примера данныхустановить см. ниже.Пример, который я привел, имеет ежедневные значения, чтобы уменьшить сложность - поэтому в этом случае, как я могу получить месячные значения фрейма данных, когда температура минимальная и максимальная.
У меня нет большого опытав совокупности, но я смог извлечь месячные минимальные и максимальные временные значения:
a <- as.data.frame(aggregate(df$Temp, df[4], function(x) {
c(max = max(x), min = min(x)) }))
Но я не уверен, как это сделать без потери информации из исходного фрейма данных - это было бы почтиподмножество на основе минимального и максимального аргумента?Но я не уверен, как это написать.
Буду признателен за любую помощь - и извинения за большой пример dput.Спасибо
df <- structure(list(Group.1 = c(1628, 1629, 1630, 1631, 1632, 1633,
1634, 1635, 1636, 1637, 1638, 1639, 1640, 1641, 1642, 1643, 1644,
1645, 1646, 1647, 1648, 1649, 1650, 1651, 1652, 1653, 1654, 1655,
1656, 1657, 1658, 1659, 1660, 1661, 1662, 1663, 1664, 1665, 1666,
1667, 1668, 1669, 1670, 1671, 1672, 1673, 1674, 1675, 1676),
datetime = structure(c(1466078376.13352, 1466164800, 1466251194.49235,
1466337600, 1466423992.99026, 1466510400, 1466596853.49096,
1466683185.13551, 1466769600, 1466856000.06254, 1466942345.50765,
1467028800, 1467115179.92356, 1467201600, 1467288000, 1467374400,
1467460801.81376, 1467547200, 1467633604.67316, 1467720000,
1467806423.20361, 1467892800, 1467979255.99444, 1468065552.68428,
1468152000, 1468238400, 1468324827.121, 1468411200, 1468497619.36762,
1468584000, 1468670456.74548, 1468756798.41446, 1468843200,
1468928779.09091, 1469016500.50633, 1469102400, 1469188805.17385,
1469275200, 1469361564.70097, 1469448000, 1469534423.82046,
1469620800, 1469707247.98331, 1469793556.6064, 1469880000,
1469966391.40473, 1470041370, 1470178341.25, 1470217984.93671
), class = c("POSIXct", "POSIXt")), year = c(2016, 2016,
2016, 2016, 2016, 2016, 2016, 2016, 2016, 2016, 2016, 2016,
2016, 2016, 2016, 2016, 2016, 2016, 2016, 2016, 2016, 2016,
2016, 2016, 2016, 2016, 2016, 2016, 2016, 2016, 2016, 2016,
2016, 2016, 2016, 2016, 2016, 2016, 2016, 2016, 2016, 2016,
2016, 2016, 2016, 2016, 2016, 2016, 2016), month = c(6, 6,
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 8, 8, 8), day = c(16, 17, 18, 19, 20, 21,
22, 23, 24, 25, 26, 27, 28, 29, 30, 1, 2, 3, 4, 5, 6, 7,
8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22,
23, 24, 25, 26, 27, 28, 29, 30, 31, 1, 2, 3), hour = c(11.4937413073713,
11.5, 11.4979137691238, 11.5, 11.4979137691238, 11.5, 11.5146036161335,
11.4961779013204, 11.5, 11.5003474635163, 11.4853963838665,
11.5, 11.4940931202224, 11.5, 11.5, 11.5, 11.5003474635163,
11.5, 11.5006954102921, 11.5, 11.5066018068103, 11.5, 11.5159944367177,
11.4867872044506, 11.5, 11.5, 11.5076495132128, 11.5, 11.505211952745,
11.5, 11.5159944367177, 11.4993045897079, 11.5, 11.2755681818182,
11.6385372714487, 11.5, 11.5020862308762, 11.5, 11.4895688456189,
11.5, 11.5066109951287, 11.5, 11.5132127955494, 11.4881780250348,
11.5, 11.4979137691238, 8.3314447592068, 22.3854166666667,
9.38818565400844), min = c(29.4777468706537, 29.5, 29.5333796940195,
29.5, 29.5083449235049, 29.5, 29.5152990264256, 29.4815844336345,
29.5, 29.4801945795691, 29.4680111265647, 29.5, 29.5198054204309,
29.5, 29.5, 29.5, 29.5093815149409, 29.5, 29.5361613351878,
29.5, 29.4906184850591, 29.5, 29.4735744089013, 29.5041724617524,
29.5, 29.5, 29.4930458970793, 29.5, 29.5100764419736, 29.5,
29.4860917941586, 29.5152990264256, 29.5, 29.2840909090909,
29.5295358649789, 29.5, 29.4610570236439, 29.5, 29.5375521557719,
29.5, 29.500347947112, 29.5, 29.5069541029207, 29.4860917941586,
29.5, 29.4819193324061, 29.1133144475921, 28.7291666666667,
29.2911392405063), sec = c(30, 30, 30, 30, 30, 30, 30, 30,
30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30,
30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30,
30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30), DOY = c(167.499723767578,
168.5, 169.499936254057, 170.5, 171.499918868799, 172.5,
173.500619108329, 174.499827957301, 175.5, 176.500000723882,
177.499369301499, 178.5, 179.499767633773, 180.5, 181.5,
182.5, 183.500020992587, 184.5, 185.500054087467, 186.5,
187.500268560343, 188.5, 189.500648083758, 190.499452364395,
191.5, 192.5, 193.500313900479, 194.5, 195.500224162227,
196.5, 197.500656776387, 198.499981648895, 199.5, 200.490498737374,
201.505792897328, 202.5, 203.500059882553, 204.5, 205.499591446453,
206.5, 207.50027569976, 208.5, 209.500555362386, 210.499497759233,
211.5, 212.499900517694, 213.367708333333, 214.953023726852,
215.41186269339), Day = c(1628.49972376758, 1629.5, 1630.49993625406,
1631.5, 1632.4999188688, 1633.5, 1634.50061910833, 1635.4998279573,
1636.5, 1637.50000072388, 1638.4993693015, 1639.5, 1640.49976763377,
1641.5, 1642.5, 1643.5, 1644.50002099259, 1645.5, 1646.50005408747,
1647.5, 1648.50026856034, 1649.5, 1650.50064808376, 1651.49945236439,
1652.5, 1653.5, 1654.50031390048, 1655.5, 1656.50022416223,
1657.5, 1658.50065677639, 1659.4999816489, 1660.5, 1661.49049873737,
1662.50579289733, 1663.5, 1664.50005988255, 1665.5, 1666.49959144645,
1667.5, 1668.50027569976, 1669.5, 1670.50055536239, 1671.49949775923,
1672.5, 1673.49990051769, 1674.36770833333, 1675.95302372685,
1676.41186269339), DayH = c(1628.47890588781, 1629.47916666667,
1630.47907974038, 1631.47916666667, 1632.47907974038, 1633.47916666667,
1634.47977515067, 1635.47900741256, 1636.47916666667, 1637.47918114431,
1638.47855818266, 1639.47916666667, 1640.47892054668, 1641.47916666667,
1642.47916666667, 1643.47916666667, 1644.47918114431, 1645.47916666667,
1646.4791956421, 1647.47916666667, 1648.47944174195, 1649.47916666667,
1650.47983310153, 1651.47861613352, 1652.47916666667, 1653.47916666667,
1654.47948539638, 1655.47916666667, 1656.47938383136, 1657.47916666667,
1658.47983310153, 1659.47913769124, 1660.47916666667, 1661.46981534091,
1662.48493905298, 1663.47916666667, 1664.47925359295, 1665.47916666667,
1666.47873203523, 1667.47916666667, 1668.4794421248, 1669.47916666667,
1670.47971719981, 1671.47867408438, 1672.47916666667, 1673.47907974038,
1674.34714353163, 1675.93272569444, 1676.39117440225), DayD = c(1628,
1629, 1630, 1631, 1632, 1633, 1634, 1635, 1636, 1637, 1638,
1639, 1640, 1641, 1642, 1643, 1644, 1645, 1646, 1647, 1648,
1649, 1650, 1651, 1652, 1653, 1654, 1655, 1656, 1657, 1658,
1659, 1660, 1661, 1662, 1663, 1664, 1665, 1666, 1667, 1668,
1669, 1670, 1671, 1672, 1673, 1674, 1675, 1676), Sal = c(29.0488087045063,
29.0242089236389, 28.9704142552782, 28.9337236612778, 28.9124731267455,
28.8621913531181, 28.7694603506606, 28.6800432876789, 28.6368648858889,
28.5239238692008, 28.6274684358136, 28.6899766423333, 28.7094982390063,
28.6427974009653, 28.6540963996528, 28.5762126331528, 28.5617631359555,
28.6364940399097, 28.6458543031711, 28.603713066875, 28.65796586713,
28.6926140346389, 28.6470827340195, 28.5985220503964, 28.6620416165972,
28.6305870582222, 28.7001961730876, 28.6916165265, 28.6656868092356,
28.8356597378472, 29.266969874235, 28.418354432114, 28.3670879136597,
28.7002130192898, 28.1320816093038, 27.4618531637569, 27.5341382380668,
27.4453546479236, 28.2270356746662, 28.3642271282222, 27.9785534427697,
28.1165695540903, 28.6652365165229, 28.4222878245758, 28.4388172580139,
28.0149544998192, 28.4748151350047, 28.0933474488542, 27.8804163691308
), Temp = c(-0.902727819368567, -0.824054421545139, -0.720653055488178,
-0.64214159655, -0.557226600257997, -0.438045884220833, -0.395580348047288,
-0.295740618513551, -0.262320095793056, -0.160162734756081,
-0.20336842434701, -0.197846770197222, -0.133355481749131,
-0.0565102243486111, -0.0215979124673611, 0.125483112529167,
0.238572840179291, 0.272823149654167, 0.311757436682198,
0.392257187272917, 0.396628769779013, 0.475891600833333,
0.607289245171071, 0.644559951482615, 0.665206005440278,
0.727629137738889, 0.696052211995828, 0.752315860946528,
0.832433359182071, 0.471555079075, -0.187290608750348, 1.12906111324131,
1.24940833146181, 0.780415736372869, 2.0088144469993, 2.93373915290972,
3.19907420429903, 3.16430728506875, 1.87296632160014, 1.74067924683403,
2.50500692939318, 2.26088904221181, 1.20761122894784, 1.64661297725591,
1.68971783634167, 2.8011089384096, 1.70051260145987, 2.9201268373125,
3.38838510550127), Den = c(1023.3705136356, 1023.34875807153,
1023.30254908484, 1023.27139922778, 1023.25147035396, 1023.20777893194,
1023.13225399791, 1023.05719108895, 1023.02118660833, 1022.92671791522,
1023.01148932893, 1023.06187513264, 1023.07546443363, 1023.01910884861,
1023.02718869861, 1022.95948791944, 1022.94312314663, 1023.00176208264,
1023.00818908971, 1022.97111798194, 1023.01464410354, 1023.03946157917,
1022.99742747636, 1022.95676902782, 1023.00684491736, 1022.97892510208,
1023.03639020376, 1023.02648772361, 1023.00193750904, 1023.15208127222,
1023.5269599694, 1022.78984692211, 1022.74222825486, 1023.03256159162,
1022.51158633193, 1021.90175907847, 1021.95317423018, 1021.88198156806,
1022.59607175591, 1022.71358182847, 1022.35521831037, 1022.47925275556,
1022.98340138456, 1022.76567206815, 1022.77633019236, 1022.36132367177,
1022.80426542115, 1022.42016046875, 1022.21591253502), Chl = c(0.426618683276773,
0.415201663443056, 0.385096423775383, 0.363738871729861,
0.409404512937413, 0.434480798338889, 0.491604291206537,
0.464091430292564, 0.519904672929861, 0.549126851486449,
0.552805036465925, 0.557850158557639, 0.466429236588603,
0.510509837531944, 0.488934344839583, 0.3889341805625, 0.423089474131341,
0.499932285390278, 0.459906828269124, 0.365046922974306,
0.275903841463516, 0.249863925111806, 0.234845544844924,
0.225590052227399, 0.230629094999306, 0.214579363215278,
0.166625286886648, 0.171862695222222, 0.188135247756776,
0.2714899376625, 0.249608510288595, 0.234688186765647, 0.263209856711111,
0.223578790403409, 0.196086601016174, 0.300936248076389,
0.198270502905424, 0.254613127958333, 0.211631943366481,
0.194650132228472, 0.221967901366736, 0.287470503101389,
0.346767555667594, 0.272033042223922, 0.261851759145139,
0.30292882953338, 0.354326095381492, 0.139364686395833, 0.25231837455865
), O2 = c(8.40147872631572, 8.38937171346181, 8.41514077121905,
8.42152294330694, 8.47538879331154, 8.49880474437986, 8.47472190401391,
8.57655982897498, 8.61944234794514, 8.61577329576095, 8.69213896446314,
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8.54381038276356, 8.66501514202014, 8.70410267486577, 8.4057585319121,
8.04968271129722, 7.92461467095619, 7.9134090372875, 8.41306227992907,
8.53320737933681, 8.33820448514335, 8.38417834865208, 8.62405400836439,
8.42477547407102, NaN, 8.40141680898052, 8.48576496565722,
8.28582430035417, 7.96892147137215), ID = c(1.21133857408067,
1.16902903935, 1.11473135400904, 1.07275230797986, 1.03223155043115,
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0.707145974122307, 0.599273624570139, 0.502570098100694,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0), PAR = c(23.0673615360132,
32.1793662073708, 6.5780126555751, 26.73609441565, 48.6703905053255,
31.0519168669979, 32.4282362099165, 62.9277536311577, 42.349564172909,
36.1037009880507, 36.4754793940695, 41.2935785894486, 56.3411955151001,
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109.206260157938, 107.575876383898, 116.456387998532, 101.787857506992,
138.683838377278, 59.2571219263966, 301.257992689583, 132.693163343932
), CO2 = c(313.287072418802, 316.458148259666, 311.875193224513,
310.725188107302, 307.113608999861, 305.345432183449, 306.866938424095,
296.338500576548, 301.685137467594, 301.496499046973, 292.31953961727,
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267.118504699234, 265.624798023783, 275.240563041295, 266.857200690445,
79.6423144553947, 283.663994869992), IR = c(94.888329799096,
168.205345239028, 43.6012952622392, 155.376871086389, 249.315080590056,
188.485805169097, 140.05749463426, 327.30331523419, 317.749437070833,
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190.64123323394, 86.6026193321907, 449.640322291667, 216.572470091966
), Wind = c(1.98109184856853, 4.53879830464599, 8.70032103138219,
6.59899662613967, 2.86950158330462, 1.91094036908824, 2.49644956157983,
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2.16237533031289, 2.15848082990616, 2.82829126926611, 3.04592042806289,
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1.39712269197199, 2.07052311200698, 3.19886056692388, 4.59176673645728,
4.23987138922819, 6.5241126458074, 7.15729601227273, 5.78232411651958,
4.8622789499446, 4.40757803569404, 6.01049680807786, 4.37623822535244,
5.64634072332915, 6.9869768911053, 6.16325833892184, 4.01858391688531,
5.13520196430042, 4.98398472755042, 5.54085930760014, 6.1472408154439,
2.8608028792402, 3.73845798467388, 4.77812324101398, 2.78512103174882,
3.31994465129167, 2.24169682706943), AirTemp = c(4.40810744394993,
4.83240431381944, 2.53433683929068, 3.31246568041667, 3.30829270725313,
5.59009755125, 5.59340448650904, 7.34151981681723, 7.95149346486111,
6.35076665670605, 9.06164061349096, 10.7704471338194, 10.8565160628214,
7.49149095395833, 8.37798674340278, 6.50827215368056, 5.0225399762335,
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14.0608254371528, 15.2186511161335, 17.322914922114, 17.6249810152778,
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