我正在学习R，并且正在努力进行以下数据转换。我有一个像这样的数据集：
> dput(act.byHour_corr)
structure(list(hour = c(0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L,
10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L,
23L, 0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L,
14L, 15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L, 0L, 1L, 2L,
3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L,
17L, 18L, 19L, 20L, 21L, 22L, 23L, 0L, 1L, 2L, 3L, 4L, 5L, 6L,
7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L,
20L, 21L, 22L, 23L, 0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L,
11L, 12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L,
0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L,
15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L, 0L, 1L, 2L, 3L,
4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L,
18L, 19L, 20L, 21L, 22L, 23L, 0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L,
8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 20L,
21L, 22L, 23L, 0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L,
12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L, 0L,
1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L,
15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L, 0L, 1L, 2L, 3L,
4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L,
18L, 19L, 20L, 21L, 22L, 23L, 0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L,
8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 20L,
21L, 22L, 23L, 0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L,
12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L, 0L,
1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L,
15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L, 0L, 1L, 2L, 3L,
4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L,
18L, 19L, 20L, 21L, 22L, 23L, 0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L,
8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 20L,
21L, 22L, 23L, 0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L,
12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L, 0L,
1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L,
15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L, 0L, 1L, 2L, 3L,
4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L,
18L, 19L, 20L, 21L, 22L, 23L, 0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L,
8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 20L,
21L, 22L, 23L, 0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L,
12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L, 0L,
1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L,
15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L, 0L, 1L, 2L, 3L,
4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L,
18L, 19L, 20L, 21L, 22L, 23L, 0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L,
8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 20L,
21L, 22L, 23L, 0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L,
12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L, 0L,
1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L,
15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L, 0L, 1L, 2L, 3L,
4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L,
18L, 19L, 20L, 21L, 22L, 23L, 0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L,
8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 20L,
21L, 22L, 23L, 0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L,
12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L, 0L,
1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L,
15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L, 0L, 1L, 2L, 3L,
4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L,
18L, 19L, 20L, 21L, 22L, 23L, 0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L,
8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 20L,
21L, 22L, 23L, 0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L,
12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L, 0L,
1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L,
15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L, 0L, 1L, 2L, 3L,
4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L,
18L, 19L, 20L, 21L, 22L, 23L, 0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L,
8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 20L,
21L, 22L, 23L, 0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L,
12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L, 0L,
1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L,
15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L, 0L, 1L, 2L, 3L,
4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L,
18L, 19L, 20L, 21L, 22L, 23L, 0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L,
8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 20L,
21L, 22L, 23L, 0L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L,
12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L),
data_hour = structure(c(1529452800, 1529456400, 1529460000,
1529463600, 1529467200, 1529470800, 1529474400, 1529478000,
1529481600, 1529485200, 1529488800, 1529492400, 1529496000,
1529499600, 1529503200, 1529506800, 1529510400, 1529514000,
1529517600, 1529521200, 1529524800, 1529528400, 1529532000,
1529535600, 1529539200, 1529542800, 1529546400, 1529550000,
1529553600, 1529557200, 1529560800, 1529564400, 1529568000,
1529571600, 1529575200, 1529578800, 1529582400, 1529586000,
1529589600, 1529593200, 1529596800, 1529600400, 1529604000,
1529607600, 1529611200, 1529614800, 1529618400, 1529622000,
1529625600, 1529629200, 1529632800, 1529636400, 1529640000,
1529643600, 1529647200, 1529650800, 1529654400, 1529658000,
1529661600, 1529665200, 1529668800, 1529672400, 1529676000,
1529679600, 1529683200, 1529686800, 1529690400, 1529694000,
1529697600, 1529701200, 1529704800, 1529708400, 1529712000,
1529715600, 1529719200, 1529722800, 1529726400, 1529730000,
1529733600, 1529737200, 1529740800, 1529744400, 1529748000,
1529751600, 1529755200, 1529758800, 1529762400, 1529766000,
1529769600, 1529773200, 1529776800, 1529780400, 1529784000,
1529787600, 1529791200, 1529794800, 1529798400, 1529802000,
1529805600, 1529809200, 1529812800, 1529816400, 1529820000,
1529823600, 1529827200, 1529830800, 1529834400, 1529838000,
1529841600, 1529845200, 1529848800, 1529852400, 1529856000,
1529859600, 1529863200, 1529866800, 1529870400, 1529874000,
1529877600, 1529881200, 1529884800, 1529888400, 1529892000,
1529895600, 1529899200, 1529902800, 1529906400, 1529910000,
1529913600, 1529917200, 1529920800, 1529924400, 1529928000,
1529931600, 1529935200, 1529938800, 1529942400, 1529946000,
1529949600, 1529953200, 1529956800, 1529960400, 1529964000,
1529967600, 1529971200, 1529974800, 1529978400, 1529982000,
1529985600, 1529989200, 1529992800, 1529996400, 1.53e+09,
1530003600, 1530007200, 1530010800, 1530014400, 1530018000,
1530021600, 1530025200, 1530028800, 1530032400, 1530036000,
1530039600, 1530043200, 1530046800, 1530050400, 1530054000,
1530057600, 1530061200, 1530064800, 1530068400, 1530072000,
1530075600, 1530079200, 1530082800, 1530086400, 1530090000,
1530093600, 1530097200, 1530100800, 1530104400, 1530108000,
1530111600, 1530115200, 1530118800, 1530122400, 1530126000,
1530129600, 1530133200, 1530136800, 1530140400, 1530144000,
1530147600, 1530151200, 1530154800, 1530158400, 1530162000,
1530165600, 1530169200, 1530172800, 1530176400, 1530180000,
1530183600, 1530187200, 1530190800, 1530194400, 1530198000,
1530201600, 1530205200, 1530208800, 1530212400, 1530216000,
1530219600, 1530223200, 1530226800, 1530230400, 1530234000,
1530237600, 1530241200, 1530244800, 1530248400, 1530252000,
1530255600, 1530259200, 1530262800, 1530266400, 1530270000,
1530273600, 1530277200, 1530280800, 1530284400, 1530288000,
1530291600, 1530295200, 1530298800, 1530302400, 1530306000,
1530309600, 1530313200, 1530316800, 1530320400, 1530324000,
1530327600, 1530331200, 1530334800, 1530338400, 1530342000,
1530345600, 1530349200, 1530352800, 1530356400, 1530360000,
1530363600, 1530367200, 1530370800, 1530374400, 1530378000,
1530381600, 1530385200, 1530388800, 1530392400, 1530396000,
1530399600, 1530403200, 1530406800, 1530410400, 1530414000,
1530417600, 1530421200, 1530424800, 1530428400, 1530432000,
1530435600, 1530439200, 1530442800, 1530446400, 1530450000,
1530453600, 1530457200, 1530460800, 1530464400, 1530468000,
1530471600, 1530475200, 1530478800, 1530482400, 1530486000,
1530489600, 1530493200, 1530496800, 1530500400, 1530504000,
1530507600, 1530511200, 1530514800, 1530518400, 1530522000,
1530525600, 1530529200, 1530532800, 1530536400, 1530540000,
1530543600, 1530547200, 1530550800, 1530554400, 1530558000,
1530561600, 1530565200, 1530568800, 1530572400, 1530576000,
1530579600, 1530583200, 1530586800, 1530590400, 1530594000,
1530597600, 1530601200, 1530604800, 1530608400, 1530612000,
1530615600, 1530619200, 1530622800, 1530626400, 1530630000,
1530633600, 1530637200, 1530640800, 1530644400, 1530648000,
1530651600, 1530655200, 1530658800, 1530662400, 1530666000,
1530669600, 1530673200, 1530676800, 1530680400, 1530684000,
1530687600, 1530691200, 1530694800, 1530698400, 1530702000,
1530705600, 1530709200, 1530712800, 1530716400, 1530720000,
1530723600, 1530727200, 1530730800, 1530734400, 1530738000,
1530741600, 1530745200, 1530748800, 1530752400, 1530756000,
1530759600, 1530763200, 1530766800, 1530770400, 1530774000,
1530777600, 1530781200, 1530784800, 1530788400, 1530792000,
1530795600, 1530799200, 1530802800, 1530806400, 1530810000,
1530813600, 1530817200, 1530820800, 1530824400, 1530828000,
1530831600, 1530835200, 1530838800, 1530842400, 1530846000,
1530849600, 1530853200, 1530856800, 1530860400, 1530864000,
1530867600, 1530871200, 1530874800, 1530878400, 1530882000,
1530885600, 1530889200, 1530892800, 1530896400, 1530900000,
1530903600, 1530907200, 1530910800, 1530914400, 1530918000,
1530921600, 1530925200, 1530928800, 1530932400, 1530936000,
1530939600, 1530943200, 1530946800, 1530950400, 1530954000,
1530957600, 1530961200, 1530964800, 1530968400, 1530972000,
1530975600, 1530979200, 1530982800, 1530986400, 1530990000,
1530993600, 1530997200, 1531000800, 1531004400, 1531008000,
1531011600, 1531015200, 1531018800, 1531022400, 1531026000,
1531029600, 1531033200, 1531036800, 1531040400, 1531044000,
1531047600, 1531051200, 1531054800, 1531058400, 1531062000,
1531065600, 1531069200, 1531072800, 1531076400, 1531080000,
1531083600, 1531087200, 1531090800, 1531094400, 1531098000,
1531101600, 1531105200, 1531108800, 1531112400, 1531116000,
1531119600, 1531123200, 1531126800, 1531130400, 1531134000,
1531137600, 1531141200, 1531144800, 1531148400, 1531152000,
1531155600, 1531159200, 1531162800, 1531166400, 1531170000,
1531173600, 1531177200, 1531180800, 1531184400, 1531188000,
1531191600, 1531195200, 1531198800, 1531202400, 1531206000,
1531209600, 1531213200, 1531216800, 1531220400, 1531224000,
1531227600, 1531231200, 1531234800, 1531238400, 1531242000,
1531245600, 1531249200, 1531252800, 1531256400, 1531260000,
1531263600, 1531267200, 1531270800, 1531274400, 1531278000,
1531281600, 1531285200, 1531288800, 1531292400, 1531296000,
1531299600, 1531303200, 1531306800, 1531310400, 1531314000,
1531317600, 1531321200, 1531324800, 1531328400, 1531332000,
1531335600, 1531339200, 1531342800, 1531346400, 1531350000,
1531353600, 1531357200, 1531360800, 1531364400, 1531368000,
1531371600, 1531375200, 1531378800, 1531382400, 1531386000,
1531389600, 1531393200, 1531396800, 1531400400, 1531404000,
1531407600, 1531411200, 1531414800, 1531418400, 1531422000,
1531425600, 1531429200, 1531432800, 1531436400, 1531440000,
1531443600, 1531447200, 1531450800, 1531454400, 1531458000,
1531461600, 1531465200, 1531468800, 1531472400, 1531476000,
1531479600, 1531483200, 1531486800, 1531490400, 1531494000,
1531497600, 1531501200, 1531504800, 1531508400, 1531512000,
1531515600, 1531519200, 1531522800, 1531526400, 1531530000,
1531533600, 1531537200, 1531540800, 1531544400, 1531548000,
1531551600, 1531555200, 1531558800, 1531562400, 1531566000,
1531569600, 1531573200, 1531576800, 1531580400, 1531584000,
1531587600, 1531591200, 1531594800, 1531598400, 1531602000,
1531605600, 1531609200, 1531612800, 1531616400, 1531620000,
1531623600, 1531627200, 1531630800, 1531634400, 1531638000,
1531641600, 1531645200, 1531648800, 1531652400, 1531656000,
1531659600, 1531663200, 1531666800, 1531670400, 1531674000,
1531677600, 1531681200, 1531684800, 1531688400, 1531692000,
1531695600, 1531699200, 1531702800, 1531706400, 1531710000,
1531713600, 1531717200, 1531720800, 1531724400, 1531728000,
1531731600, 1531735200, 1531738800, 1531742400, 1531746000,
1531749600, 1531753200, 1531756800, 1531760400, 1531764000,
1531767600, 1531771200, 1531774800, 1531778400, 1531782000,
1531785600, 1531789200, 1531792800, 1531796400, 1531800000,
1531803600, 1531807200, 1531810800, 1531814400, 1531818000,
1531821600, 1531825200, 1531828800, 1531832400, 1531836000,
1531839600, 1531843200, 1531846800, 1531850400, 1531854000,
1531857600, 1531861200, 1531864800, 1531868400, 1531872000,
1531875600, 1531879200, 1531882800, 1531886400, 1531890000,
1531893600, 1531897200, 1531900800, 1531904400, 1531908000,
1531911600, 1531915200, 1531918800, 1531922400, 1531926000,
1531929600, 1531933200, 1531936800, 1531940400, 1531944000,
1531947600, 1531951200, 1531954800, 1531958400, 1531962000,
1531965600, 1531969200, 1531972800, 1531976400, 1531980000,
1531983600, 1531987200, 1531990800, 1531994400, 1531998000,
1532001600, 1532005200, 1532008800, 1532012400, 1532016000,
1532019600, 1532023200, 1532026800, 1532030400, 1532034000,
1532037600, 1532041200, 1532044800, 1532048400, 1532052000,
1532055600, 1532059200, 1532062800, 1532066400, 1532070000,
1532073600, 1532077200, 1532080800, 1532084400, 1532088000,
1532091600, 1532095200, 1532098800, 1532102400, 1532106000,
1532109600, 1532113200, 1532116800, 1532120400, 1532124000,
1532127600, 1532131200, 1532134800, 1532138400, 1532142000,
1532145600, 1532149200, 1532152800, 1532156400, 1532160000,
1532163600, 1532167200, 1532170800, 1532174400, 1532178000,
1532181600, 1532185200, 1532188800, 1532192400, 1532196000,
1532199600, 1532203200, 1532206800, 1532210400, 1532214000,
1532217600, 1532221200, 1532224800, 1532228400, 1532232000,
1532235600, 1532239200, 1532242800, 1532246400, 1532250000,
1532253600, 1532257200, 1532260800, 1532264400, 1532268000,
1532271600, 1532275200, 1532278800, 1532282400, 1532286000,
1532289600, 1532293200, 1532296800, 1532300400, 1532304000,
1532307600, 1532311200, 1532314800, 1532318400, 1532322000,
1532325600, 1532329200, 1532332800, 1532336400, 1532340000,
1532343600, 1532347200, 1532350800, 1532354400, 1532358000,
1532361600, 1532365200, 1532368800, 1532372400, 1532376000,
1532379600, 1532383200, 1532386800, 1532390400, 1532394000,
1532397600, 1532401200, 1532404800, 1532408400, 1532412000,
1532415600, 1532419200, 1532422800, 1532426400, 1532430000,
1532433600, 1532437200, 1532440800, 1532444400, 1532448000,
1532451600, 1532455200, 1532458800, 1532462400, 1532466000,
1532469600, 1532473200, 1532476800, 1532480400, 1532484000,
1532487600, 1532491200, 1532494800, 1532498400, 1532502000,
1532505600, 1532509200, 1532512800, 1532516400, 1532520000,
1532523600, 1532527200, 1532530800, 1532534400, 1532538000,
1532541600, 1532545200, 1532548800, 1532552400, 1532556000,
1532559600, 1532563200, 1532566800, 1532570400, 1532574000,
1532577600, 1532581200, 1532584800, 1532588400, 1532592000,
1532595600, 1532599200, 1532602800, 1532606400, 1532610000,
1532613600, 1532617200, 1532620800, 1532624400, 1532628000,
1532631600, 1532635200, 1532638800, 1532642400, 1532646000,
1532649600, 1532653200, 1532656800, 1532660400, 1532664000,
1532667600, 1532671200, 1532674800, 1532678400, 1532682000,
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其中hour是一天中从0到23的小时，date and time是时间戳，activity是一天中该小时的平均小时活动。
我想计算每小时的平均总活动量，最后得到一个这样的表（值已经被发明）：
head(output)
hour avg
1 0 7.50
2 1 6.56
3 2 7.56
4 3 6.46
5 4 4.62
6 5 3.97
很抱歉，如果帖子标题误导了我，我想不出更好的办法来总结我的问题。
感谢任何输入！