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函数卡片 Rëëëkkk¡¡¡ �©� (=©)d Tom Short tshort@eprisolutions. com>�§\Œ±3 www.Rpad.orgþ��#©�. ¥©‡�©� (®¼� Tom Short �€ÈNŒ) (� þÓ�‡aq§ÛÜV\ eZ~^·-"�Y? ¾±9‘od4g)KI§Xkïƽ¦¯žéX e‡ sunbjt@gmail.com½ÆÌ http://bjt.name ¥©‡�µ2008c 8� 3F?¾ ÏÏÏÚÚÚÄÄÄ::: ŒÜ© R¼êÑk3‚©�" ...

函数卡片
Rëëëkkk¡¡¡ �©� (=©)d Tom Short tshort@eprisolutions. com>�§\Œ±3 www.Rpad.orgþ��#©�. ¥©‡�©� (®¼� Tom Short �€ÈNŒ) (� þÓ�‡aq§ÛÜV\ eZ~^·-"�Y? ¾±9‘od4g)KI§Xkïƽ¦¯žéX e‡ sunbjt@gmail.com½ÆÌ http://bjt.name ¥©‡�µ2008c 8� 3F?¾ ÏÏÏÚÚÚÄÄÄ::: ŒÜ© R¼êÑk3‚©�" help(topic)'u topic�©�. ?topicÓþ help.search("topic")|¢ÏXÚ apropos("topic") ˆ£3|¢´»e¹ (Ü©) '…c”topic” � ¤k閶¡ help.start() HTML/ª�Ï demo() R õUü« example(f)$13‚Ï¥�~f str(a)w« Ré–�S3á5 (*str*ucture)½{‡`²é– summary(a)‰Ñ a�V‡,Ï~´˜‡˜„5ÚOV‡;…§éØÓ á5� akØÓ�öŠª. ls()w« “|¢´»”e�é–;ŒU½^‡|¢" ls.str() str()|¢´»e�z‡Cþ†Ùá5 dir()w«�c8¹e�©‡ list.files()Óþ getwd()¼�󊴻&E setwd()�˜óŠ´» methods(a)w« a� “S3 methods” methods(class=class(a))�L¤kŒ±)ûáué–a�{ options(...) �˜½u��Ûëê; ~^ëêk: width, digits, error install.packages(pkg)SC pkg update.packages()gÄé'‡�§¿Î¯# library(pkg)\1 pkg require(x)Óþ library(help=pkg)Ы pkg�&E attach(x)ò x• R�|¢´»; xŒ±¦˜‡�L,êâµ,½ö ´d saveMï� R data file. ¦^ search()5w«|¢´». detach(x) attach�_L§. assign(x,value)ò valueDŠ‰ x,=”<−” quit()òÑ�c R¬{ (q()½ Ctrl z) ÑÑÑ\\\†††ÑÑÑÑÑÑ load()\1d save·-���]�8 data(x)\1½�êâ edit()N^©�?6ì?U Ré– fix(x) ‘fix’N^ ‘edit’?U ‘x’ data.entry(x)>fêâL/ª�¹\?6ì scan(x)l››�½©‡¥Ö�ê⏕þ½�L read.table(file) Ö�L‚ª�©‡¿òÙMï¤êâµ; %@ ©Î sep="" ?¿˜x; ¦^ header=TRUE Ö�1˜1 Š�IK; ¦^ as.is=TRUE “ŽiΕþC factors; ¦ ^ comment.char="" “Ž "#" �)º5º; ¦^ skip=n 3 ÖêâcaL n1;[„Ï'u1·¶,NA?n,ÚÙ¦ read.csv("filename",header=TRUE) Óþ, �%@�˜Ö � csv©‡ (Comma Separated values) read.delim("filename",header=TRUE) Óþ, %@�˜Ö � tab©©‡ read.fwf(file,widths,header=F,sep="\t",as.is=FALSE) ± f ixed width formatted/ªÖ�êâ–êâµ; widths´�ê •þ,^u�˜N�°Ýiã save(file,...) ±Ø©²���?›�½�é– save.image(file)�¤k�é– dump("x","...")òé– x�3 “...” p cat(..., file="", sep=" ") r›=ziÎ�‹<é–�D Š; sepé–DŠm�©ÎÒ print(a, ...) w« a�DŠ§˜„�§§éuØÓ�閌± kØÓ�Lˆª" format(x,...) ‚ªz,Ð�w« R é– write.table(x,file="",row.names= T ,col.names= T , sep="") 3r x =zêâµ�, ��©‡; XJ quote  TRUE, iÎÚÏf�Ò¬� (") ¤Œ; sep ´i㩅Î; eol —1©Î; na "”ŠiÎG; ¦^ col.names=NA O \�IK±BuÚL‚Ñ\˜— sink(file)ÑÑ�©‡ file,†�Ñ\·- sink() ŒÜ© I/O ¼êÑk file ëþ. §²~^˜‡iÎG5·¶©‡½ ë�. file=""¿›XIOÑ\½ÑÑ.ë� (Connections)Œ±¹© ‡ (file),+� (pipes),Ø ©‡ (zipped files)½ RCþ 3 windows öŠ‚¸e§êâ�Œ±ÏL�i†£clipboard¤� ª. 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