Basic graphic in R.pdf

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1、BasicgraphicsinRUlrichHalekohBiometryResearchUnitDanishInstituteofAgriculturalSciencesJanuary9,2007Contents1Introduction22Theexampledata33Singleplot43.1Simplescatterplot.........................43.2Labelingaxesandsettingtheirrange..............43.3Choosingsymbols,colors

2、andsizesforthepoints.......53.4Title................................73.5Addinglinestoaplot.......................73.5.1Connectingpoints.....................83.5.2Addastraightline....................83.5.3Addasmoothline....................93.5.4ablineAddareferenceline...

3、............113.6Addtexttoaplot........................124Overlayingseveralscatterplots1314.1Severalscatterplotsinoneplot.................144.2Legend...............................155Plotssidebyside166Somespecialplots186.1Scatterplotmatrix.........................186.2B

4、oxplot..............................196.2.1Asingleboxplot......................196.2.2Severalboxplotsinoneplot...............196.3Dotplot..............................216.4Histogramanddensity......................216.5Q-Qplot..............................237Trellisgraph

5、ics247.1Scatterplotssidebyside.....................247.2Overlaidscatterplots.......................248Howtoplacemyplotsinadocument?259Moretolearnaboutgraphics261IntroductionRhastwoprimarymethodsforproducinggraphics.1.ThestandardmethodofRistobuildaplotsequentially.Youuse

6、ahigh-levelfunctionasplottosetupthebasicplot.Youcancontrolmanyelementsintheplotfunction,e.g.therangeoftheaxes,thetypeoftheplottingsymbols2orthetitle.Aftercreationofthebasicplot,youaddadditionalelements,suchaslinesortext.2.The’trellis’-graphics.Thesegraphicsweredeveloped

7、toenhancetheclarityofinformationofstatisticalplots.Theseareespeciallystronginpresentingtherelationshipoftwovariablesconditioningonthelevelsofathird.The’trellis’systemisavailableinRinthelatticepackage.Itsmainfunctionisxyplot.Thegraphicsarenotgeneratedsequentiallybutbyone

8、calltothefunction.Usingthe’trellis’-methodissomewhatmorecomplex-butoftenmoreelegant-thanthebasicsystem.Especia