ããã¯ããĄãŧãĒãŗã°ãĒãšãã§ãŽč°čĢãĢįļãæŠčŊãĒã¯ã¨ãšãã§ãã
į§ã¯ãããŽãããĒããŽãéč¨åŊĸåŧã¨ããĻæã¤ã¨äžŋåŠã ã¨æããžãã
DT[, a %<>% some.function]
ãããžã§ãŽã¨ãããå Ĩåããåŋ čĻããããžã
DT[, a := a %>% some.function]
ãžãã¯magrittrãĒã
DT[, a := some.function(a)]
ããã¯ã a
ãéˇãååãŽå¤æ°ãĢįŊŽãæããããå ´åãĢįšãĢéčĻã§ããããŽå¤æ°ã¯ãå
ĨåãčĒãŋåããå°éŖã§ãã įšãĢå¤æ°åãéˇãå ´åã¯ãããã§īŧããã°ãŠããŧãŽīŧåšįã大åš
ãĢį¯į´ã§ããã¨æããžãã
DT[, a := some.function(a)]
åŽå ¨ãĢæŖ常ãĢåäŊããžã
ããããį§čĻ
Complicated_data_table_variable_name[, a_very_very_very_very_long_variable_name := some.function(a_very_very_very_very_long_variable_name)]
åŽå ¨ãĢå æ°ã§ã¯ãããžããã ããŽäžŋåŠãĒéĸæ°ãčŋŊå ããã¨ãããĸã¤ããĸãåĨŊãã§ãã
ãããããããã%:>%
ã¯%<>%
ãããåĒããĻããã§ããããīŧ
ããŧãŋãģãããĢããŽãããĒåĨåĻãĒååãåĢãããšãã§ã¯ãããžããã ããã¯ä¸äžŋã§ããããģã¨ããŠäŋåŽã§ããžããã ããäģĨå¤ãĢãååãå¤æ°ãĢæ ŧį´ããĻãããæŦĄãŽæäŊãčĄããã¨ãã§ããžãã
shortname <- "a_very_very_very_very_long_variable_name"
DT[, (shortname) := some.function(get(shortname))]
ããŽéãã§ãããä¸éãŽéˇããŽå¤æ°ãäŊŋį¨ããĻããmagrittræ§æãŽæšãčĒãŋåãã¨æ¸ãčžŧãŋãĢã¯ãããĢäžŋåŠã§ãã ã¨ãĢãããããã¯į§ãŽåäēēįãĒæčĻã§ãã
å¤æ°ãĢäŊãäŋåãããĻããããæįĸēãĢãããããĢãč¤éãĒããŧãŋãģãããĢéˇãå¤æ°åãåĢããæšãããå ´åããããžãã ããã¯åäēēįãĒåĨŊãŋãŽåéĄã§ãã ãŗãŗããã¨ãŗãšéĸæ°ã¯ãåŽįžŠãã¨ãĢãŋãšã¯ãåŽčĄããåŋ čĻã¯ãããžããããŗãŧããŖãŗã°ãéĢéãĢãĒããå¤ããŽå ´åãįč§ŖãããããĒããžãã ããŽæŠčŊãå¤ããŽãĻãŧãļãŧãĢåŊšįĢã¤ãã¨ã¯ééããããžããã ããããdata.tableéįēč ãīŧå¤ãããīŧäžŋåŠãĒéĸæ°ãåŽčŖ /įļæããããĒãå ´åã¯ããŠãããĢįˇãåŧãåŋ čĻããããã¨ãįč§ŖããĻããžã;īŧ
ããŽãšãŦãããčŗŧčĒããĻããæšã¯ãæåžãŽãŗãĄãŗãīŧįžå¨ã¯åé¤ãããĻããžãīŧãįĄčĻããĻãã ããã ã°ãããĻããã
@ and3kãŽãŗãĄãŗãããæ§į¯ããã¨ã
DT[, a %:=>% some.function]
čĒãŋããããĒãã¨æããžãīŧã¤ãžãã :=
ã¨%>%
ä¸įˇãĢīŧã ããã¯ã嚸ããĒãã¤ããã§ããīŧ ãããĢæ¸ãããĻãããããĢãį§ã¯å¤æ°åãŽįš°ãčŋããæ¸ããåĒåãŽããĄãŗã§ãīŧ http īŧ
:=>
æŧįŽåãŽ=>
é¨åãĢã¯ãčŋŊå ãŽæåŗããããžãããããã:=:
īŧ
DT[, a %:=:% some.function]
ãžãã¯:=.
ã¯ã :=
åžãĢ.
ãfunãĢæ¸ĄããããããĢį´æĨããããããžã
=>
ã¯ãŠãŽãããĒįšåĨãĒæåŗããããžããīŧ >
ã¯ãRHSã¸ãŽåŧæ°ã¨ããĻLHSãæ¸Ąããã¨ãäŧãããŽã§äžŋåŠã§ãã ãããããããĒãŧãå
ãŽ%.%
ãã%>%
å¤æ´ãããįįąã§ãã
į§ãŽįč§Ŗã§ã¯ã %>%
ãĢį§ģåããåæŠãŽå¤§é¨åã¯ã %.%
ãããå
Ĩåãã¯ãããĢį°Ąåã§ããã¨ãããã¨%.%
ãå
Ĩåãããã¨ãããã¨ãå¤ãã¨æããžãīŧ %>%
īŧã
į§ã¯_ãã大ãããįãã_æŧįŽåãæåŗããžãã
ãããĻã %:>%
ãŠãã§ããīŧ ããã¯ã %:=>%
ãžãã¯%:=:%
ãããå
Ĩåãį°Ąåã§ãã
and3kã¯ãã§ãĢä¸č¨ãŽ1ã¤ãĢč¨åããĻããžãã
į§ãŽæįĨ¨ã¯%:>%
ãžãã¯:>
ã§ãã
%
ã¯ãRãåŽéãĢã¯ä¸įŊŽæŧįŽåã訹å¯ããĻããĒããããĢãŽãŋåå¨ããžãããīŧ DT[]
å
ãŽæŧįŽåãį¯į´ãããã¨ãã§ããžãã
ãŋã¤ããŗã°ãŽå´éĸãčæ
ŽããĻããžããã§ãããã¤ãžããæŧįŽåãŽããšãĻãŽæåãŽShiftããŧãæŧãããžãžãĢããæšãį°Ąåã ã¨æããžãã įãĢããĒãŖãĻããžãã
:>
ã¯æŽåŋĩãĒããč§Ŗæãããžããã [...]
ãŽå
é¨ã¯ãæåšãĒRæ§æã§ããåŋ
čĻããããžãīŧããšãĻãŽåŧæ°ã¯ãéĸæ°ãĢæĒčŠäžĄã§æ¸ĄãããåãĢ常ãĢč§ŖæãããžãīŧãããããŖãĻã [...]
å
é¨ã§æ°ããæŧįŽåãäŊæãããã¨ã¯ã§ããããŠããããåŋ
čĻããããžãã %
ã
ã§ã¯ã %:>%
ã¯į§ãĢãäŧŧåããžãã ããã大ããĒåĒå
äēé
ã§ããã¨ã¯éããžããããåŽčŖ
ãããŽã¯éŖãããĒããč°čĢãããŽã¯č¯ããã¨ã§ã¯ãããžããã
ãããã¨ãã %:>%
ã¯į§ãĢã¯č¯ãããã§ãã
ä¸æč°ãĒãã¨ãĢã :=
ã[....]
å
ã§č§ŖæããĻãããŽãĢããĒã:>
ãč§ŖæãããĒããŽã§ããīŧ :=
ãæåšãĒRæ§æã§ã¯ãããžãããīŧ
@ my-R-ãããæåšãĒæ§æã§ãããŽãåŠããĻãã ããããããčĻãĻãã ãããĒãīŧ=ãä¸įŊŽæŧįŽåã¨ããĻ訹å¯ãããĻãããŽã§ããīŧ
+ 1OPæŠčŊãŽčĻæąã¨magrittræ§æãŽäŊŋį¨ãĢåæããžãã ããã¯ãããã¤ããŽįįąãããæč¯ãã¤æãæįŊãĒé¸æã§ãã
äģģæãŽmagrittrãŽé¸æã¨åããããĢé¸æããæ°ããæŧįŽåãå°å Ĩãããã¨ãĢãããããŽFRãčããããĒããããĢåŧˇããå§ãããžãã
äģģæãŽmagrittrãŽé¸æã¨åããããĢé¸æããæ°ããæŧįŽåãå°å Ĩãããã¨ãĢãããããŽFRãčããããĒããããĢåŧˇããå§ãããžãã
@ctbrownææĄã¯ã %>%
ã¨ã¯į°ãĒãäŊããčĄããã¤ãæŧįŽåãäģãŽããã¤ããŽãã¤ãæŧįŽåãåĢããããąãŧã¸ãå¯žčąĄã¨ããĻããžãã ããããŽãããã¨ãįĢļåããĒãéããäŊãåéĄãĒãŽã§ããããã
OPãŽFRãĒã¯ã¨ãšãã¯ååãĢæįĸēã ãŖãã¨æããžãã
%<>%
ãčģĸéãã¤ãã¨å˛ãåŊãĻãŽįĩãŋåããã¨ããĻå
ˇäŊįãĢäŊŋį¨ãã
ãĒããŦãŧãŋãŧã ããããããã¯ãmagrittrããã§ãĢ%<>%
ãåŽįžŠããĻããããã§ã
ãžããĢããŽįŽįã magrittrãæ¯é
įãĒãã¤ããŽãããĢčĻãããŽã§
åŽčŖ
ã¨å¤ããŽäēēã
ãīŧ
<>īŧ
ãäŊŋį¨ããĻããããã§ããį§ãŽåĻįã¨
ããããŽéãŽååã åĨãŽããŽãį´šäģãããŽã¯æåŗããããžãã
ãžãŖããåãįŽįãŽæŧįŽåã ãé¸æããæšãã¯ãããĢįãĢããĒãŖãĻããžã
ãŗããĨãããŖããããããĻããããžãã¯ãã§ãĢæãŖãĻããããŽãĢä¸č´ããæ§æ
æĄį¨ã ãĻãããŋãšãĢã¤ããĻãŽį§ãŽãã¤ãŗããåį
§ããĻãã ããã
åĨãŽãĒããŦãŧãŋãŧãį´šäģãããã¨ã§äŊãåžãããã¨æããžããīŧ
åĨãŽãŗãŗãããšãã§ãžãŖããåãæŠčŊãåŽčĄããžããīŧ čĻããĒã
ãŠããĒåŠįã§ãã é¸æããæŧįŽåã¯ãmagrittrã¨åããããäģģæã§ãã
ããããŖãĻãåãĢãˇãšãã å
¨äŊãæŖæįãĢãããã¨ã¯æåŗããããžããã
ãããĢåĨãŽæŖæįãĒããŽãĢãããŽã§ã¯ãĒããããã§magrittrãŽãĒãŧããĢåžã
æ§æä¸ãŽæąēåŽīŧ
11æ41 AMãĢæ¨ã2016åš´10æ27æĨãĢã¯ãfranknarf1 [email protected]
æ¸ããžããīŧ
æ°ããããŽãå°å ĨããĻãããŽFRãčããããĒããããĢåŧˇããå§ãããžã
é¸æãäģģæãŽmagrittrãŽé¸æã¨åãã§ããæŧįŽåã@ctbrownhttps īŧ//github.com/ctbrownææĄã¯ãã¤ããĒããŦãŧãŋãŧåãã§ã
ããã¯magrittrãŽãããŠīŧ >īŧ ã¨ã¯éããã¨ãããžã
äģãŽããã¤ããŽãã¤ãæŧįŽåãåĢããããąãŧã¸ã ããã§ãĒãéã
ããããŽããããã¨įĢļåããžããåéĄã¯äŊã§ããīŧâ
ããĒããč¨åããããŽã§ãããĒãã¯ãããåãåãŖãĻããžãã
ããŽãĄãŧãĢãĢį´æĨčŋäŋĄããGitHubã§čĄ¨į¤ēããĻãã ãã
https://github.com/Rdatatable/data.table/issues/1208#issuecomment -256732710ã
ãžãã¯ãšãŦãããããĨãŧãããžã
https://github.com/notifications/unsubscribe-auth/AC5xaxIp36dTUCz9d5a5mU7CJUV6PaxCks5q4PBDgaJpZM4FSJR5
ã
%<>%
ã¯åį
§ãĢããŖãĻå˛ãåŊãĻãããžããīŧ ããã§ãĒãå ´åãåŊŧãã¯åŽéãĢã¯ãžãŖããåããã¨ãããĻããžããã
æčĄįãĢã¯ããĒãã¯æŖããã§ããmagrittrãŽīŧ
<>īŧ
ã¯åį
§ãĢããŖãĻå˛ãåŊãĻãžããã
ããããããã¯čĻįšãčļ
ããĻããžãã ãĻãŧãļãŧãŽæåž
ãŽį¯å˛å
ã§ã
éãã åį
§ãĢããå˛ãåŊãĻãå¤ãĢããå˛ãåŊãĻã
åŽčŖ
ãŽåéĄã¯ã¤ãŗãŋãŧãã§ãŧãšãŽåéĄã§ã¯ãããžããã OPã¯æĄį¨ãææĄããžãã
magrittrã¤ãŗãŋãŧãã§ãŧãšã§ãããåŋ
ãããåŽčŖ
ãį¤ēåããĻããããã§ã¯ãããžããã
OPææĄãĢãĄãĒããããããžããã ä¸č¨ãŽįįąãåį
§ããĻãã ããã į§ã¯ããžãã
'īŧ
īŧ>īŧ
or anything as
arbitrary. The merit of this has not been articulated. The
īŧ
<>īŧ
`ãŽãããĒããŽãæĄį¨ããįįąãåį
§ããĻãã ãã
ãĒããŦãŧãŋãŧã¯ãã§ãĢåå¨ããmagrittrãĢããŖãĻįŠæĨĩįãĢæ¨é˛ãããĻããžãīŧ12įĒįŽãĢå¤ã
METACRANãĢããã¨äēēæ°ãŽãããããąãŧã¸ã§ããīŧããã¯äŊããã
æ¨æēãĢãĒããžãīŧRãŗããĨãããŖå
īŧã ããŠããŧãããã¨ãŽč¯ãã¨ãã
įĸēįĢãããæ
ŖčĄã¯ããĻãŧãļãŧãŽæˇˇäšąã¨
å
æŦįãĒãããĨãĄãŗãã ããããããã¯magrittrã¨åãã§ããį§ã¯
ããŽããŠã¯ãŧããã¤ããįĨãŖãĻããĻããããã¯äŊã§ãããã§ã¯ãĒããå˛ãåŊãĻãčĄããžãã
åĨåĻãĒīŧ
īŧ>īŧ
īŧ ããã¯æ°ãããã¨ããŽįĩĩæåã§ããīŧã
14:18ãŽæ¨ã2016åš´10æ27æĨãĢã¯ããã¤ãąãĢãģããĒãŗ[email protected]
æ¸ããžããīŧ
īŧ <>īŧ ã¯åį §ãĢããŖãĻå˛ãåŊãĻãžããīŧ ããã§ãĒãå ´åãåŊŧãã¯åŽéãĢã¯_ããĻããĒã_
ãžãŖããåããã¨ãâ
ããĒããč¨åããããŽã§ãããĒãã¯ãããåãåãŖãĻããžãã
ããŽãĄãŧãĢãĢį´æĨčŋäŋĄããGitHubã§čĄ¨į¤ēããĻãã ãã
https://github.com/Rdatatable/data.table/issues/1208#issuecomment -256772769ã
ãžãã¯ãšãŦãããããĨãŧãããžã
https://github.com/notifications/unsubscribe-auth/AC5xa3ssE14PcamL2U9HlvCdfA8-7Iz8ks5q4RUagaJpZM4FSJR5
ã
ãĻãŧãļãŧãŽæåž ãŽį¯å˛å ã§ãéãã¯ãããžããã
ãžãããããįåŽã§ãããããĒããããšãĻãŽãĻãŧãļãŧãŽãããĢ芹ããĻããã¨ã¯æããžããã ãã¨ãã°ãį§ã¯ãĻãŧãļãŧã§ãã æŦĄãĢããããåŊãĻã¯ãžãå ´åãããããŽãĻãŧãļãŧã¯data.tableãŽäŊŋį¨æŗãåĻãļã¨ããĢéããĢã¤ããĻåĻãļåŋ čĻããããžãã
ããĒããŽãä¸č¨ãŽįįąãã¯į§ã¨ä¸įˇãĢæ°´ãäŋæããĻããžããã éč¤ããĒããã¤ãæŧįŽåãåŽčŖ ããĻãæįĸēã§ãããéĸéŖãããã¨ãčĄããã¨ã¯ããŠããããããmagrittrãĢåãããã¨ã§ã¯ãããžããã į§ãĢã¨ãŖãĻ-ãããĻããã¯į§ãŽå°čąĄã§ãããããĒããč¨ãŖãĻãããã¨ã¯ããšãĻããĒããŽããŽã§ãããŽã¨åããããĢ-ããã¯magrittrãŽãįĸēįĢãããæ ŖčĄãīŧį§ãdata.tableãäŊŋį¨ãããŽã¨ãģãŧåããããé ģįšãĢäŊŋį¨ããīŧã¨åŽå ¨ãĢä¸č´ããĻããããã§ãīŧã
ããŽãŗãŗãããšãã§äŊŋį¨ããã¨ãä¸åēĻãĢč¤æ°ãŽãĒãã¸ã§ã¯ãīŧåīŧãĢå˛ãåŊãĻãããå¯čŊæ§ããããžããããã¯ã %<>%
..īŧã¨ã¯ãžãŖããį°ãĒããã¨ãĢåæããã¯ãã§ãã ã¤ãžã
DT[, (cols) %:>% lapply(as.character) ]
ãžããåį
§ãĢããŖãĻå¤æ´ããä¸åēĻãĢč¤æ°ãŽããŽãå¤æ´ããå¯čŊæ§ããããã¨ãĢå ããĻã %<>%
ã¨ã¯ãžãŖããį°ãĒãããŽīŧdata.tableīŧãŽä¸é¨ãå¤æ´ããĻããã¨ããäēåŽããããžãã
ã¨ãĢãããéįēč ã¯ãããĢããŽãŋãšã¯ãåŽčĄããå åãį¤ēããĻããĒããŽã§īŧããŽFRãĢåĒå åēĻãžãã¯ãã¤ãĢãšããŧãŗãããŧã¯ãããã¨ãĢããŖãĻīŧãåŽéãĢåé˛ããå ´åã¯ããããåæ¤č¨ããĻãŋãžãããīŧ
@ctbrown _by-reference_ã¯åŽčŖ
ãį°ãĒãã ãã§ãĒãããĻãŧãļãŧã¤ãŗãŋãŧãã§ã¤ãšãŽ_by-value_éĸæ°ã¨åēåĨããåŋ
čĻããããžãã ããããdata.tableãŽset*
éĸæ°ã¨:=
æŧįŽåãŽčĻįšã§ãããéĸæ°ãŽå
ĨåãåŽéãĢå¤æ´ããĻããããŽããĻãŧãļãŧãĢæįĸēãĢäŧããžãã ããŽãããĒįãæéãŽåžãRãŗããĨãããŖå
ãŽæ¨æēãå¤æãããŽã¯å°éŖã§ãããRãĸããĒãąãŧãˇã§ãŗã¯æ°ååš´ãĢãããŖãĻäŊæãããĻããããæ°ããæ¨æēããå¤æãããŽã¯ææå°æŠã§ãã ãééãŖãĻããå ´åã¯č¨æŖããĻãã ããã äŊåēĻãč¨ãŖããããĢãmagrittrãã¤ãã¯ããŗãŧããŽããŖãŗã¯ãæį¤ēãããã¨ããĢã¤ãŗãŋãŠã¯ããŖããĢäŊŋį¨ãããŽãĢé常ãĢäžŋåŠã§ãããæŠčŊãä¸ģãĒįĻįšã§ããRãããąãŧã¸ãäŊæããå ´åã¯åŽéãĢã¯åŋ
čĻãããžããã IMOã§äŊããã¤ãŗããŦãŧãšã§å¤æ´ã§ããå ´åã¯ãã¤ãŗããŦãŧãšã§å¤æ´ããĒãæŧįŽåã¨ã¯į°ãĒãæŧįŽåãäŊŋį¨ããåŋ
čĻããããžãã
@ franknarf1 ã
ãžããããšãĻãŽRãĻãŧãļãŧãĢã¤ããĻ芹ããã¨ãĢã¤ããĻãŽä¸ģåŧĩã¯ãããžããã§ããã ããã¯ã°ãããä¸ģåŧĩã§ãã ããĻãŧãļãŧãŽæåž
ãã¸ãŽč¨åã¯ãããããį§čĒčēĢãããããOPã¨ããã§ãĢdt[ , var %<>% ... ]
ãčŠĻãããĒããããæŠčŊããĒããŽããå°ããį§ãŽåĻįãŽäŊäēēããĢ寞ããããŽã§ããã ãããĢãDTãæåž
ãŠãããĢæŠčŊããå ´åããĻãŧãļãŧãĢãdata.tableãŽäŊŋį¨æŗãåĻãļã¨ããĢéããĢã¤ããĻåĻãļããã¨ã¯åąéēã§ãã ããã¯æĒããŊãããĻã§ãĸč¨č¨ãĢã¤ãĒãããžãã
įŦŦäēãĢãããĒããææãããããĢãmagriitræ§æãĢåžãã¨ããOPãŽææĄãĢåžããã¨ãĢčŗæããĻč°čĢãåãå ĨãããæåĻãããã¯åäēēãŽč˛Ŧäģģã§ãã ãĒããããæįã§ããããĢã¤ããĻããã¤ããŽč°čĢãæäžãããĻããžããããäģŖæŋæĄãåĒããĻããããããã¯æįã§ããããįįąãæäžããčĒŦåžåãŽããč°čĢã¯ãģã¨ããŠãããžããã åŽčŖ ãį°ãĒãããããã¤ããŧãĒč°čĢãããããã§ãããããã¯ããĒãåŧąãč°čĢã§ãã
ãããĢã
%<>%
ã¯ãč¤æ°ãŽåŧæ°ãåĻįãããããĢåŽčŖ
ãããã¨ãã§ããOPãäģãŽäēēãŽæåž
ãåŽããĒããããŗãŗãããšãå
ã§åŽå
¨ãĢæåŗããĒããžãã OPãŽææĄã¯ãåŊŧãč¤æ°ãŽåŧæ°ãå¤æ´ãããããŠãããåŽéãĢã¯æåŽããĻããžããã§ãããOPãŽææĄãĢčŗæ/å寞ãŽč°čĢãããã°ãį§ã¯ããããčããĻãŋããã§ãã ããããį§ãčããå¯ä¸ãŽãã¨ã¯ãããããéããããã¨ãããã¨ã§ãã ããļããããã¯æåšã§ããã¨čããäēēããããããããžããããOPãŽåŊåãŽææĄã¨æ¯čŧããã¨ãäģŖæŋæĄã¯č¯ããĒãããã§ãã
data.table
ãäŊŋį¨ãããã¨ãŽããäēēã¯ããã¤ãåĨãŽæšæŗã§:=
äŊŋį¨ãĢã¤ããĻåĻãļåŋ
čĻããããžãīŧããããéå§åžãããĢīŧã ãããä¸æ°åŗīŧ <-
ãžãã¯=
ã¯ãĒããŽã¯ãĒãã§ããīŧ
ãããĢ寞ããįãã¯ãčĒ°ããdata.table
äŊŋį¨ãĢã¤ããĻæåãĢåĻãļãã¨ãŽ1ã¤ã§ãã ããã¯ã 2įĒįŽãŽã¤ãŗãããããããŽãããã¯ã§ãã
%<>%
ã¨%<:>%
īŧãžãã¯æįĩįãĢã¯äŊã§ããīŧã¯ãžãŖããåãåēåĨã§ãã ããããŖãĻãįãã¯ããã§ããããĢããŖãĻãĢããŧãããĻããžãīŧ
http://stackoverflow.com/questions/7033106/why-has-data-table-defined-rather-than-overloading
@jangorecki
ãžãããģã¨ããŠãŽãĻãŧãļãŧã¯ãåį §ãĢããããŽã¨å¤ãĢããããŽãŽéããįĨãåŋ čĻã¯ãããžããã ãããįĨãŖãĻãããã¨ã¯ãDTãäŊŋį¨ãããããŽåææĄäģļã§ã¯ãããžããã ããããããããDTæ§æãDFãĢé常ãĢčŋãįįąã§ãã @mattdowleã¯ãį´į˛éĸæ°åã¤ãŗãŋãŧãã§ãŧãšãåããDTãæįĸēãĢč¨č¨ã§ããã¯ãã§ãã åŊŧã¯ããžããã§ããã ãããããįįąãŽ1ã¤ã¯ãDTãäģŖæŋåãŽããããã¨ããĻæŠčŊããå¯čŊæ§ããããã¨ã§ããã
set*
éĸæ°ãĢéĸããĻã¯ããããã¯åį
§ãĢããŖãĻį¤ēãããå ´åããããžãããããæįĸēãĒset*ByRef
ã¨ããååã§ã¯ãĒããã¨ãĢæŗ¨æããĻãã ããã ããããŽæŠčŊã¯ãä¸ģãĢåšįįãĒæäŊãåŽčĄããDFãDTãĢå¤æããããŧãč¨åŽãããããĢåå¨ããĻããããã§ãã ããããåį
§ãĢããæäŊãį¤ēããããĢåããããã¨ãã§ããã¨ãããã¨ã¯äēæŦĄįãĒããã§ãã
:=
ãį§ã¯åŊŧãäŊŋį¨ããįįą@mattdowleããŧã¤ãŗã°ã¯ããĻãŧãļãŧUCLAã§å°ãæãåēãã¨æããžã:=
ãŽäģŖãããĢ=
ã IIRCãåŊŧã¯=
ãäŊŋį¨ã§ããã :=
ãåŠį¨å¯čŊã§ããã¨čŋ°ãšãžããã IIRCãåŊŧã¯=
ãäŊŋį¨ãããã¨ãåĨŊãã ã§ãããã
RãŗããĨãããŖãŽæ¨æēã§ããWRTīŧæ¨æēããĒããã¨ã§æåīŧmagrittrã¯ãåēãäŊŋį¨ãããč°čĢãããĻããžãã OPã¯ãããã¨ãŽį¸äēéį¨æ§ãåĒããæŠčŊãĢãĒããã¨ãį¤ēåããĻããžãã åæããžãã ãããĢã¤ããĻįåãããå ´åã¯ãCRANããŧã¸ããčĻ§ãã ããã éįēč ã¯ãįŦčĒãŽãããąãŧã¸ã§magrittrãäŊŋį¨ããĻããžãã ãããĢããããąãŧã¸ãŽäŊæã¯RãĻãŧãļãŧãŽå¤§å¤æ°ã§ã¯ãããžããã ããããããã¯æŦåŊãĢãããã¯ãããŽé¸čąã§ãã
ããĒããæäžããč°čĢã¯ããå˛ãåŊãĻã¯åį §ãĢããããŽã§ãããæ§æãį°ãĒããããDTã¯magrittrã¨ã¯į°ãĒããžãããĢ芲åŊããžãã åŋįã¯ãžã ã§ãīŧåŽčŖ ã¯į°ãĒããžããæŦåŊã§ãã ãã ãããģã¨ããŠãŽãĻãŧãļãŧãĢã¨ãŖãĻåŽčŗĒįãĢåãæäŊã§ããããĻãŧãļãŧãŽæåž ãĢæēæ ãããŗãŗãããšãããåŽéãŽæäŊãæ¨æ¸Ŧã§ãããããã¤ãŗãŋãŧãã§ãŧãšã¯åãã§ããåŋ čĻããããžãã
@mattdowleã¯ãį´į˛éĸæ°åã¤ãŗãŋãŧãã§ãŧãšãåããDTãæįĸēãĢč¨č¨ã§ããã¯ãã§ãã åŊŧã¯ããžããã§ããã
åŊŧãããĒããŖããŽã¯ããããã ãį´į˛ãĢæŠčŊããããĢããã¯ãããã¨ã¯ããĻãŧãļãŧãããéãããããĄãĸãĒåšįãŽéĢããŗãŧããæ¸ããããĢäŊŋį¨ã§ãããããĢãĒãŖãããã¤ããŽéčĻãĒæŠčŊãåé¤ãããã¨ãæåŗããžãã ãį´į˛éĸæ°ãããŦãŧã ã¯ãŧã¯ã§äŊŋį¨ãããŽã¯åēæŦįãĢåŽį¨įã§ã¯ãĒãããã¸ã§ã¯ãīŧã¤ãžãããĸãŗãĢãŧãĸããĒãŗã°īŧããããžãã
@jangorecki
å
¨ãããŖãĻåãæčĻã§ãã ããããį§ããĄã¯åŊåãŽææĄããDTãŽãĄãĒããã¸ã¨é¸čąãå§ããĻããžãã
@MichaelChirico
č°čĢãĢæããŽæčĻããããããĻãããĻãããã¨ãã åį §ã¯å ãŽææĄããå°ãå¤ããĻããžãããčŗæãŽãã¤ãŗããžãã¯OPææĄãčĒŦæãããŽãĢåŊšįĢãĄãžãã
:=
åãĢããã¤ãčŠĻããžããã īŧåŊŧã¯æåãŽæ¨æēæåãĢãããæ´åããĻããæįŊãĒããŽãčŠĻããĻãŋãžãã<-
ã <<-
ã :=
ããããåŠį¨å¯čŊã ãŖããŽã§ãĄãããŠã¤ãžãããã¨éãæ§æãŽãããĢäŊãããé¸æčĸã åŊŧãæ°ããæŧįŽåãåŽįžŠãããããæĸåãŽæŧįŽåãåĨŊããã¨ã¯æããã§ããããžããããšãĻãŽRãĻãŧãļãŧãĢã¤ããĻ芹ããã¨ãĢã¤ããĻãŽä¸ģåŧĩã¯ãããžããã§ããã ããã¯ã°ãããä¸ģåŧĩã§ãã ããĻãŧãļãŧãŽæåž ãã¸ãŽč¨åã¯ãį§čĒčēĢãããããOPã¨į§ãŽåĻįãŽäŊäēēããĢ寞ããããŽã§ããã
ããĒããæŦåŊãĢčĒåčĒčēĢãæåŗããã¨ããĢããĻãŧãļãŧããæããã¨ã¯ãéåšæã§æ°ãæŖããäŋŽčžįãĒčŖ
įŊŽã§ãã OPãã %:>%
ã¯į§ãĢã¯äŧŧåããã¨č¨ãŖãĻãããã¨ãĢãæ°ãĨãããããããžããã
éįēč ãŽčĄåãžãã¯ä¸äŊįēã¯åĨãŽčĩ¤ãããˇãŗã§ãããOPãŽææĄ/čĻæąãŽãĄãĒããã¨ã¯éĸäŋãããžããã ããã¯ããŠãĄããŽæšæŗã§ãåŽéãĢã¯æčĻãæäžããĻããĒããããĒã貧åŧąãĒ樊å¨ã¸ãŽč¨´ããŽč°čĢã§ãã
į§ã¯ããã§čĢįšãä¸ģåŧĩããĻããĒããŽã§ãããã¯æ¨Šå¨ã¸ãŽč¨´ãã§ã¯ãããžããã čŊãĄįããŽã¯ããĒãã¸ãŽãĸããŧãĢã¨ããĻã ããã¯æąēããĻåŽčŖ ãããĒããããããĒããŽã§ã大é¨ããåģļæãããã¨ã¯ã§ããžãããīŧ åŽčŖ åžãĢéĸæ°ãŽååãåãæŋãããŽã¯į°ĄåãĒãã¨ã ã¨æããžãīŧãããããĒãīŧãããŽæįšã§ãŠãŽãããĒæŖįĸēãĒæŠčŊãčĻãĻãããŽããããããããžãã
åŽčŗĒįãĒč°čĢãĢéĸããéããæŦĄãŽãããĢãĒããžãã
%<>%
åããããĢãããŽLHSä¸ãŽč¤æ°ãŽãĒãã¸ã§ã¯ããå¤æ´ãããããĢlist(x, y) %<>% log
ãĢéĄäŧŧãã DT[, c("x", "y") := lappy(.SD, log), .SDcols = c("x","y")]
ã%<>%
ãx[ 2:4 ] %<>% log
ãããĒãĒãã¸ã§ã¯ããŽä¸é¨ãå¤æ´ãããããĢäŊŋį¨ãããå¯čŊæ§ããããã¨ãį§ãčĻãæåãŽããŗãã§ããããã¯DT[ 2:4, x := log(x) ]
éĄäŧŧããĻããžããhttps://github.com/tidyverse/magrittr/issuesã§ããããŽæŠčŊãŽFRãčĻããŽãæĨŊããŋãĢããĻããžããįĸēããĢããŽæŠčŊãäŊŋį¨ãããŽã§ãFRãééãããã¨ãéĄãŖãĻããžãã
@ franknarf1 ã
åããããã¤ãŗã; OPããīŧ īŧ>īŧ ã¯į§ãĢã¯äŧŧåããã¨č¨ãŖãĻãããŽãčĻéããĻããžããã
ãããĢãããããããããã¯į§ã ãã§ã¯ãããžããã OPã¯ãæåãĢmagrittræ§æãææĄããžããã ãããããåŊŧã¯åžã§äģŖæŋæĄãčĒãããĢãããããããããã¯č¯ãčãã ã¨æãŖãã į§ããããč¯ãčãã ã¨æãŖãĻããžããããããį§ããããĢéŖããĻããįįąã§ãããããã¯ãããčŠĻããäŊäēēããŽåĻįãĢããŖãĻäŋãããžããã ãããããäģãĢããããžãã ã¨ãĢããããããå¯ä¸ãŽčĻįšã¨ããĻå´ä¸ãããã¨ã¯ããĄããŖã¨ãããã¤ãŗããŽčãĢãããžãã
įŦŦäēãĢãč°čĢã¯åŽéã樊å¨ã¸ãŽč¨´ãã§ããã åŽå ¨ãĢčŊãĄįããĻããžããããčŊãĄįããŽãé åããããããžããã ããããĢãããããŽįšã¯čŠąéĄããå¤ããĻãããããĢæãããOPææĄãŽãĄãĒãããĢ寞åĻããĻããžããã ãžãããããåŽæŊãããå¯čŊæ§ãé常ãĢäŊãã¨ããäēåŽã¯ãææĄãŽãĄãĒããã¨ã¯éĸäŋããĒãããã§ãã
ããã¯ããĒããæŖãããã¨ããããĢčĒããĒããã°ãĒããžããã åŽčŖ ããéĸæ°ãŽååãå¤æ´ãããŽã¯į°Ąåã§ãã ãã ããããŽãããĒå¤æ´ãĢãããããŽæŠčŊãäŊŋį¨ããĻéįēããããŗãŧããį ´æããå¯čŊæ§ããããžãã åžã§äēææ§ãŽãĒãå¤æ´ã§ãĻãŧãļãŧãĢč˛ æ ãããããŽã§ã¯ãĒããåŽčŖ ããåãĢã¤ãŗãŋãŧãã§ãŧãšãĢã¤ããĻ芹ãåããã¨ãĢæéãč˛ģãããã¨ã¯åŽå ¨ãĢįãĢããĒãŖãĻããžãã č°čĢããˇãŖããããĻãŗãããã¨ãæį¨ãĒįŽįãĢåŊšįĢã¤ãŽãã¯ä¸æã§ãã
åŽčŗĒįãĒč°čĢãĢéĸããĻã¯ãåŊŧãã¯ãææĄããã%<>%
æ§æãĢ寞åĻããããããmagrittrãŽæŠčŊãŽåä¸ãæ¯æããĻããããã§ãã īŧåäēēįãĢã¯ãmagrittrãŽäēēã
ãããĒããŽææĄãįšãĢæåãŽææĄãåŽčĄããåŋ
čĻããããã¨ãĢåæããžãã2įĒįŽãŽææĄããããģãŠäŊŋį¨ããããŠããã¯ããããžãããīŧmagrittrãŽäēēã
ã¸ãŽææĄãĢéĸäŋãĒããäŊããããžããã DTãæĄåŧĩæŠčŊãæĄį¨ããmagrittr %<>%
æŧįŽåãäŊŋį¨ãããã¨ã¨įįžããĻããžãã ãããĻãį§ã¯ãžã åŽéãĢčĒãã§ãããã %:=%
īŧãžãã¯äģŖæŋīŧã%<>%
ãããåĒããĻããã¨ããčĒŦåžåãŽããč°čĢãããĻããžãã
芹éĄãĢæģããããĢãéĸéŖããč°čĢãčĻį´ãããã¨ãåŊšįĢã¤ãããããĒãã¨æããžããã
%:>%
ãæ¯æããč°čĢīŧ
%<>%
ã¯äģãŽé¸æčĸã¨åããããĢæŖæįã§ããã %:>%
ã¯ããDTãĢäŧŧãĻããžãã%<>%
ãæ¯æããč°čĢīŧ
:=
ãŽRHSã§DTã§magrittrãäŊŋį¨ããĻããžãã ãããĢãããã¤ããŽč¨ŧæ ã¯ããĻãŧãļãŧãmagrittr %<>%
æ§æãæåž
/čŠĻãããã¨ãį¤ēåããĻããžãã ãããæĄį¨ãããã¨ã¯ãããããŽãĻãŧãļãŧãŽæåž
ãĢä¸č´ããã§ãããã%:>%
ã¯%<>%
ã¨åããããæŖæįã§ãããŗãŧããdplyr / magrittr <-> DTãĢį§ģåããã¨ãæ§æãäŧŧãĻããå ´åããããããããį°Ąåã§į°ĄåãĢãĒããžãã
åį
§ãĢããå¤æ´ãããŽį¨ŽãŽį§ģæ¤ããããŗãŧããã˛ãŠãåŖãæšæŗãåŽå
¨ãĢčĻéããĻããžãã
å
ãŽãĒãã¸ã§ã¯ããå¤æ´ãããĒããã¨ããããŖãĻããå ´æã¯ãå˛ãåŊãĻæšæŗãå¤æ´ããããããĢįĒįļå¤æ´ãããžããããŽãããæŧįŽåãåēåĨããīŧãããĻãåãčĄãĢå¤īŧãŗããŧīŧã§å˛ãåŊãĻãå¯čŊæ§ãįļæãããã¨ãéčĻã§ãīŧããŗãŧããīŧã
data.tableããŗããŧããå ´åã¨data.frameããŗããŧããå ´åīŧdt2 <-dtīŧã¨åãåéĄã§ã2įĒįŽãŽäŊæĨãŽãŋãčĄãŖãã¨ããĢãå ãŽdtãæ´æ°ãããįįąãĢã¤ããĻįĒįļé ãæŠãžããžãã
ããŽæŖįĸēãĒäēé˛įã¯ããĒããŦãŧãŋãŧãäŊãããããĢã¤ããĻãŽæŖįĸēãĒææ¸ãåŋ čĻã¨ãããããæåãŽãã¤ãŗããįĄåšãĢããžããåĨãŽææ¸ãäŊŋį¨ããã¨ãæŖããææ¸ãį°ĄåãĢčĻã¤ãããã¨ãã§ããžãã
@tensibaiã
äēč§Ŗããã ããããŖãĻããĸãĩãŧãˇã§ãŗãŽãå¯čŊæ§ããããé¨åã§ãã
1:32ãŽæ°´ã2016åš´11æ2æĨãĢã¯ãTensibaiãŽ[email protected]ã¯æ¸ããžããīŧ
ãŗãŧãã-dplyr / magrittr <-> DTãĢį§ģåããã¨ãããį°ĄåãĢãĒããžãã
å ´åãĢããŖãĻã¯æ§æãäŧŧãĻããå¯čŊæ§ãããããã§ããåį §ãĢããå¤æ´ããŠãŽãããĢã˛ãŠãčĄãããããåŽå ¨ãĢčĻéããĻããžã
ããŽį¨ŽãŽį§ģæ¤ããããŗãŧããį ´ããžãã ããĒããããĒããŽãĒãĒã¸ããĢãįĨãŖãĻããå ´æ
ãĒãã¸ã§ã¯ãã¯å¤æ´ãããžããå˛ãåŊãĻãĄãŊãããįĒįļå¤æ´ãããžã
å¤æ´ããããæŦåŊãĢæŧįŽåãåēåĨãããã¨ãéčĻã§ããįįąã§ã
īŧãããĻãåãčĄãĢå¤īŧãŗããŧīŧã§å˛ãåŊãĻãå¯čŊæ§ãįļæãããã
ãŗãŧããŽīŧãããã¯ãdata.tableããŗããŧããå ´åã¨data.frameããŗããŧããå ´åã¨åãåéĄã§ãã
īŧdt2 <-dtīŧãįĒįļãå ãŽdtããĒã
ããĒãã2įĒįŽã ãã§äģäēãããã¨ããĢæ´æ°ãããžãããâ
ããĒããč¨åããããŽã§ãããĒãã¯ãããåãåãŖãĻããžãã
ããŽãĄãŧãĢãĢį´æĨčŋäŋĄããGitHubã§čĄ¨į¤ēããĻãã ãã
https://github.com/Rdatatable/data.table/issues/1208#issuecomment -257801913ã
ãžãã¯ãšãŦãããããĨãŧãããžã
https://github.com/notifications/unsubscribe-auth/AC5xaxyWXkh4C7i5-GtjMFiQ0AY2L5BLks5q6EqIgaJpZM4FSJR5
ã
ãŗãĄãŗãã¨ããŖãŧãããã¯ããããã¨ãããããžãã
ãĄããŖã¨ãããã¨īŧäŊããčļŗããĒããããããžããīŧīŧããŽįšåŽãŽãąãŧãšã§ã¯ãåį
§ãĢããå˛ãåŊãĻãå¤ãĢããå˛ãåŊãĻããĢéãã¯ãããžãããīŧ į§ããĄããããããŽã¯ãdata.tableå
ãŽ1ã¤īŧãžãã¯č¤æ°ãŽåīŧãæ´æ°ãããã¨ã§ãã ãĻãŧãļãŧã¯ãå¤ãåããŠãĄããŽæšæŗã§ãä¸æ¸ãããããã¨ãįĨãŖãĻããžãã čĒ¤č§ŖãŽäŊå°ã¯ãããžãããã 寞į
§įãĢãããã¯DTa=DTb
ã¨DTa=copy(DTb)
īŧããŽæŠčŊãĒã¯ã¨ãšãã§ã¯čĒŦæããĻããžããīŧã¨ã¯å¤§ããį°ãĒããžããããã§ã¯ãdata.tablečĒäŊãåĻįããžããåį
§ã§å˛ãåŊãĻããå¤ã§å˛ãåŊãĻãããĢéãã¯ãããžããã
@ my-R-helpã
ããĒããŽį´æã¯æŖããã§ãã
ããŽæäŊããŠãŽãããĢ_åŽčŖ _ããããã¯ãĻãŧãļãŧãĢéãã¯ãããžããã ãĻãŧãļãŧãŽčĻŗįšããã¯ãįĩæã¯åãã§ããåãŽå¤ãåå˛ãåŊãĻãããžãã ããã¤ããŽåˇŽåĨåãåŋ čĻã§ããã¨čŋ°ãšãĻããããã¤ããŽč°čĢããããžãããã_įįą_ãĢã¤ããĻãŽčĒŦåžåãŽããčĒŦæã¯ãããžããã§ããã
%<>%
æ§æãæĄį¨ããã¨ããããĒããŽææĄã¯æŖããããŽã§ãã åŽčŖ
ã_interface_ã¨ã¯į°ãĒããã¨ãæŖããæŗåŽããĻãããæäŊãåŽčĄãããããŽä¸čŦįã§įžåããæ
ŖčĄãããããããããæĄį¨ããåŋ
čĻããããžãã åŽéãããã¯åĒãããŊãããĻã§ãĸč¨č¨ææŗãĢåžããžãã
īŧãĄãĒãŋãĢãããããã¨ãīŧSICīŧãīŧ īŧ>īŧ ã¯į§ãĢã¯äŧŧåããžããã¨č¨ãŖãã¨ããį§ã¯å°ãããŖããããžãããæåãŽį´æã¨ææĄãããŖã¨åŧˇãä¸ģåŧĩããžããã§ãããã¨ãĢãããææĄãĢæčŦããžããDTã§åŽčŖ ãããĻããããŠããã¯į´ æ´ãããã§ããīŧ
ã¯ãĒãšãããĄãŧããčŋäēãããã¨ãããããžãã
æįĸēãĢãããããĢãį§ã¯åäēēįãĢ%<>%
ãåĨŊãŋãžããããã¯ãmagrittrã¨ãŽæ´åæ§ãéĢããå¤ããŽäēēããããäŊŋį¨ããĻãããããĢčĻããããã§ãã ãã ããdata.tableéįēč
ãåĨãŽæŧįŽåīŧ %:>%
īŧãåĨŊãå ´åã¯ããããäŊŋį¨ãããã¨ãã§ããžãīŧåäēēįãĢã¯magrittrãŽæšæŗãåĨŊãŋãžããīŧã
å¤åį§ã¯ãããããŽãããĢ襨įžããšãã ãŖãã æˇˇäšąãæããå ´åã¯įŗãč¨ŗãããžããã
ãĻãŧãļãŧã¯ãå¤ãåããŠãĄããŽæšæŗã§ãä¸æ¸ãããããã¨ãįĨãŖãĻããžãã čĒ¤č§ŖãŽäŊå°ã¯ãããžãããã
ããŽæäŊãŽåŽčŖ æšæŗãĢéãã¯ãããžããã ãĻãŧãļãŧãŽčĻŗįšããã¯ãįĩæã¯åãã§ããåãŽå¤ãåå˛ãåŊãĻãããžãã
ã¸ã§ã¤ãŗäģããŽããããŦãŗãŽäŊå°ã¯ãžã ããã¨æããžãã
åãååãŽå¯äŊį¨ã§2äēēãŽæŧįŽåãŽåäŊãå°ãį°ãĒãã¨ãã¨ãŠãŧãįēįãããããĒããæˇˇäšąãæããžãã ããäģĨä¸ãŽč°čĢã¯ã§ããžãããããããąãŧã¸ãåēæŦéĸæ°ãããšã¯ããã¨ãããžãã¯ãããąãŧã¸ãããŧãããã¨ããĢåĨãŽãããąãŧã¸éĸæ°ããĒãŧããŧããŧãããã¨ããĢRãčĻåãããŽãĢã¯įįąããããžãã
į§ãŽæčĻã§ã¯ãå¯äŊį¨ãį°ãĒãå ´åãå°ãĒãã¨ãä¸é¨ãŽãĻãŧãļãŧãįšåŽãŽãĒããŦãŧãŋãŧãæã¤ãã¨ã¯éããįãŋãžãã
_ããŧããš_æŧįŽåãæ¤į´ĸããã¨ãããĢããĢ2ã¤ãŽé¸æčĸããããŽã§ã¯ãĒããééããĒãDTããŧã¸ã§čĻå/åļéãčĒŦæãããã¨ãĢãĒããžãã
ããã§ã¯ããĻãŧãļãŧã¤ãŗãŋãŧãã§ã¤ãšã§ã¯ãĒãč¨čĒãĢã¤ããĻ芹ããĻããžãããæįĩįãĒãŊãããĻã§ãĸãĻãŧãļãŧã¯XããŋãŗãŽčåžãĢããåŽčŖ ãæ°ãĢããĒããã¨ãĢåæããžãããããã°ãŠããŧã¯éĸæ°ãŽčåžãĢããåŽčŖ ãæ°ãĢããĒããã¨ãĢåæããžãã
ä¸ģãĒå寞æčĻã¯æŦĄãŽã¨ããã§ãã %<>%
ãDTãŽå¤é¨ã¨åããããĢåäŊããã¨čããĻããäēēã¯ãæåŗããĒãã¨ããĢDTåãåˇã¤ããã¨ãé ããããããĒããžãã
TL; DRīŧããã°ãŠããŗã°ã¯UXã§ã¯ãããžãããåŋ čĻãĒããŽãå ˇäŊįãĢæåŽããåŋ čĻããããããããįĨãããĻããååãååŠį¨ãããã¨ã¯ã§ããžããã
@ããŗãˇãã¤ã
å¯äŊį¨ããŠããããããį°ãĒãã¨ããä¸ģåŧĩã¯įãããã§ãã ããããŽå ´åããå¤æ°ãŽåå˛ãåŊãĻãåŽčĄãããĻããžãã ãããã¯ä¸Ąæšã¨ãå¯äŊį¨ã§ãã 严æšãŽãˇãšãã ãŽæ¯čŧæįĩįļæ ãéĄäŧŧããæšæŗã§å¤æ´ããããããåŽčŖ īŧåį §ãžãã¯å¤ãĢããīŧã¯ããããįãĢåēåĨããžããã
å¯äŊį¨ãį°ãĒãŖãĻããĻãã åēåĨã¯ããĒãéčĻã§ã¯ãããžããã ããŽįšã¯ãä¸č¨ãŽč°čĢã§įš°ãčŋãæčĩˇãããĻããžããã åēåĨãéčĻã§ããå ´åãããããĻãŧãļãŧãĢéããããããäžãæäžãããã¨ãå¯čŊã§ããã¯ãã§ãã æąēåŽįã§ã¯ãĒããäēåŽãĢåããäžããĒããã¨ã¯ãåēåĨããĒããã¨ãåŧˇãį¤ēããĻããžãã
ãĢéĸããĻīŧ
åŋ čĻãĒããŽãå ˇäŊįãĢæåŽããåŋ čĻããããããããįĨãããĻããååãååŠį¨ãããã¨ã¯ã§ããžããã
ããã¯ééãŖãĻããžãã ä¸čŦįã§ããįĨãããĻããååãŽååŠį¨ã¯ãįēįããã ãã§ãĒããé常ãĢä¸čŦįã§ãããåĒããããã°ãŠããŗã°ææŗã¨čĻãĒãããĻããžãã ããã¯ããĒãĸãŧããŖãēã ã¨åŧã°ããžãã į°ãĒãæšæŗã§åŽčŖ ãããåãååãŽãĄãŊãããäŊŋį¨ãããã¨ã¯åŽå ¨ãĢč¨ąåŽšãããžãã
person.speakīŧīŧ
"ãããĢãĄã¯ä¸į"
dog.speakīŧīŧ
"æ¨Ēįŗ¸"
ããããŽå ´åãspeak
ãäŊŋį¨ãããžããã ããã¯æĒãįŋæ
Ŗã§ããīŧ ããããåŽéãããĒãĸãŧããŖãēã ãæĄį¨ãããĒãå ´åãããã¯æ¨äēãĢãĒããžãã ããšãĻãŽéĸæ°ã¨ãĄãŊãããĢã¯įŦčĒãŽååããããžãã ããã¯ãĒãã¸ã§ã¯ãæåč¨čĒãĢåēãĨãããĒãä¸čŦįãĒäžã§ãããRãäžå¤ã§ã¯ãããžããã RãĢã¯ãåæ§ãŽæšæŗã§æŠčŊããS3ãĄãŊããã¨ã¸ã§ããĒãã¯éĸæ°ããããžãã
ããŽææĄīŧ
į§ã¯ãããã°ãŠããŧãéĸæ°ãŽčåžãĢããåŽčŖ ãĢã¤ããĻæ°ãĢãããšãã§ã¯ãĒããã¨ãĢé常ãĢåæããžããã
åæ§ãĢæŦ éĨãããããģã¨ããŠãŽãĻãŧãļãŧã¨ã¯ãšããĒã¨ãŗãšãĢåããĻããžãã ãģã¨ããŠãŽããã°ãŠããŧã¯ãããããäŊįžããŽéĸæ°/ãĄãŊãããäŊŋį¨ããžãã åŊŧãã¯åŊŧããŽåŽčŖ ãŽčŠŗį´°ãįĨããĒããĻãããããžãã ãĻãŧãļãŧã¯ãéĸæ°ãåŊšįĢã¤ãããĢå Ĩåã¨åēå/å¯äŊį¨ãįĨãåŋ čĻããããžãããããããŠãŽãããĢãããĢå°éãããã¯ãģã¨ããŠãŽå ´åįĄéĸäŋã§ãã įĸēããĢããĻãŧãļãŧã¯éĸæ°ã垎čĒŋæ´ãžãã¯ãããã°ãããããĢčŠŗį´°ãįĨãåŋ čĻãããå ´åããããžãããããã¯é常ãĢå°æ°ãŽãąãŧãšã§ããã¨ä¸ģåŧĩãããã¨ãã§ããžãã ãĻãŧãļãŧãããšãĻãŽæŠčŊãããšãĻãŽãŦããĢã§ãŠãŽãããĢæŠčŊããããįĨãåŋ čĻãããŖãä¸įãčããĻãŋãĻãã ããã čĒįĨįč˛ čˇã¯č¨ãįĨããžããã č¤éãĒããŽãããã°ãŠããŗã°ãããã¨ã¯ä¸å¯čŊãĒäŊæĨã§ãã ãĢéĸããĻīŧ
ãĒããŦãŧãŋãŧãæ¤į´ĸããã¨ãããĢããĢ2ã¤ãŽé¸æčĸããããŽã§ã¯ãĒããééããĒãčĻå/åļéãčĒŦæããDTããŧã¸ã襨į¤ēãããžãã
ããã¯_ããŧããš_ã§ã¯ãããžããããaīŧæˇˇäšąãæãīŧããã¯é常ãĢäēēæ°ãŽããmagrittrãããąãŧã¸ãexacltyã¨ãŠãŽãããĢį°ãĒããžããīŧīŧãbīŧããããčŋŊå ãŽä¸čĻãĒãããĨãĄãŗããŽåŋ čĻæ§ãįãŋåēããã¨ãĢããč˛Ŧäģģã§ãã magrittræ§æãŽå ´åãDTéįēč ã¯æŦĄãŽãããĢč¨ããã¨ãã§ããžããããããĢčĄãŖãĻãããĨãĄãŗãã¨ãããããčĒãã§ãã ãããDTã¯ããã§čĄãŖãĻãããã¨ããĩããŧãããĻããžããã ããŽååã¨ã¯ããšãããąãŧã¸åå Ĩã¯ãDTãmagrittrããããŗRã¨ãŗãˇãšãã ãŽäžĄå¤ãéĢããžãã īŧã
æåžãĢãããĻãŧãļãŧã¤ãŗãŋãŧãã§ã¤ãšãããXããŋãŗãããUXããĢéĸãããŗãĄãŗããããįšåŽãŽUIãæį¤ēãããĻãããã¨ãæ¨æ¸Ŧãããå ´åããããžãã ããã¯åãĢããã§ã¯ãããžããã ãããĻãį§ããĄãč¨čĒãĢã¤ããĻ芹ããĻãããã¨ã¯ååãĢæããã§ãããããŽč¨čĒãĢã¯ã¤ãŗãŋãŧãã§ãŧãšãæŦ ããĻããã¨č¨ããŽã¯čĒ¤ãã§ãã ã¤ãŗãŋãŧãã§ã¤ãšã¯ããŽæ§æã§ãããéčĻã§ãã
čĻį´ããã¨ãåéĄã¯æįĩįãĢč§Ŗæąēã§ããžãã
åŋ čĻãĒãŽã¯ãæŦĄãŽįŋģč¨ŗãåĻįãããã¨ã ãã§ãã
DT[, a %<:>% fun] ## or "%:>%"
DT[, a := fun(a)]
ããã§ããīŧ
a
ããˇãŗããĢã§ã¯ãĒãæåå¤æ°ã§ããå ´åããŠãŽãããĢåäŊããåŋ
čĻããããžããīŧ
DT[, "a" %<:>% fun]
DT[, "a" := fun(a)] ## this?
DT[, "a" := fun("a")] ## or this?
ããŽéˇãã1ã§ãĒãå ´åã¯ãŠããĒããžããīŧ
DT[, c("a","b") %<:>% fun]
DT[, c("a","b") %<:>% fun(a, b)]
DT[, c("a","b") %<:>% fun("a","b")]
DT[, c("a","b") %<:>% lapply(list(a, b), fun)]
DT[, c("a","b") %<:>% lapply(c("a", "b"), fun)]
åäēēįãĢč¨ãã°ãããĒãč¤éãĢãĒããæ°ããåéĄãč§Ŗæąēã§ããĒããããäŋŽæŖãããĒããŽã§éããžãã
į§ã¯ãããĢã¤ããĻåæããĻãããŽã§ãæŦåŊãĢåŋ
čĻãĒå ´åã¯ãã¤ã§ãåéãããã¨ãã§ããžãã
æãåčãĢãĒããŗãĄãŗã
čĻį´ããã¨ãåéĄã¯æįĩįãĢč§Ŗæąēã§ããžãã
åŋ čĻãĒãŽã¯ãæŦĄãŽįŋģč¨ŗãåĻįãããã¨ã ãã§ãã
ããã§ããīŧ
a
ããˇãŗããĢã§ã¯ãĒãæåå¤æ°ã§ããå ´åããŠãŽãããĢåäŊããåŋ čĻããããžããīŧããŽéˇãã1ã§ãĒãå ´åã¯ãŠããĒããžããīŧ
åäēēįãĢč¨ãã°ãããĒãč¤éãĢãĒããæ°ããåéĄãč§Ŗæąēã§ããĒããããäŋŽæŖãããĒããŽã§éããžãã
į§ã¯ãããĢã¤ããĻåæããĻãããŽã§ãæŦåŊãĢåŋ čĻãĒå ´åã¯ãã¤ã§ãåéãããã¨ãã§ããžãã