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м Ϳ 밡ϰ м Ͽ, ϰ (plyr, reshape ), ຯ , Ļ ϴ Ͽ Ʈ ϱ Ͽϴ.
м ó ϴ ִϾ Ʈ, н STEP1 м α Թ, Ͱ STEP2 ܺ , STEP3 м Ž , STEP4 Ž ðȭ ܰ нϰ Ѵٸ ؼҵǸ Դϴ.
ڷ cafe.naver.com/dataan ֽϴ.
I.LAKEױǥ
1.Ʈ,ຯ,Ļ
2.ǥ
3.μӼǰľѱǥ
4.Ӽ2,Ӽ1DZǥ
5.ΰ÷αȵͿ,Ѱ÷ؼ
ǥۼϱ
6.lengthǥ
7.ձǥ:ǰͽǸǰտǥ
8.ǥǿ̸б
9.ġ(NA)ȱǥ
10.ǥհǥϱ
11.ڵġºŽǥϱ
II.̻ó
1.̻
2.ġó
3.߸ԷµȰã
4.Ưμϱ
5.ӿӼNAľ
6.ġ(NA)ϴ
7.ġִ
8.ġִ̻̽NAǥøͼ
9.μӼ߿ϳ(NA)λ
10.(NA)(median)ġȯ
11.ײΰ(NA)߾Ӱġȯ
12.ڵ尪̿ܰNAκϱ
III.ߺ:̽Ӽ
1.ߺĺϱ
2.DataFrameӼϱ
3.ߺϳִȮϱ
4.ObjectȮϱ
IV.Ĺױȭ
1.(order)(sort)
2.ıؼ:ײͿPetal.LengthӼ
Petal.WidthӼϱ
3.ȭоͼȭϱ
4.ײͿıؼӼã
5.ȭ:airquality
6.帹ѱƯ
7.ǸԵͿϱ
8.
V.
1.ŸԺμӼϱ
2.ġŸ÷ؼ(summary)ϱ
3.ǰĪǴù°ġŽϱ
4.ǿĪǴ̽ϱ
5.ġϴµϱ
6.ǿġϴsubsetϱ
7.data.tableǿ̽ϱ
8.level߿ΰθؼðȭϱ
9.εؼʴŽϱ
10.¦ġŽϱ
VI.Ļ
1.ĻعװԼ
2.transform()mutate()ϱ
3.µͿȯϱ
4.ŸĻϱ
5.ôôĻ
6.(low),߰(medium),(high)Ļϱ
7.̵߱εŸĻϱ
8.ġϴθŸĻ
9.Sepal.Length5.0̻̰SpeciesSetosaηĻ
ϱ
VII.
1.level̵ǰԸ
2.3ôα䵥ϱ
3.ӼٸӼϴϴȮϱ
4.鼭ѴǸ̴¹ΰ
5.ȭ帣ϱ
VIII.ຯ
1.ຯؿͻϱ
2.
3.పNAҰذ
4.ײͿײִ밪,ּҰ,տຯ߰ϱ
5.ϵ