Lecture note Data visualization - Chapter 25

In this lecture we learned about: Function plots, three dimensional plotting, surface plotting, mesh plot, surf plot, contour plot, editing in plot in graphical window, making plot from workspace window.
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Lecture note Data visualization - Chapter 25Lecture25RecapFunctionPlotsThreeDimensionalPlottingSurfacePlottingMeshPlotSurfPlotContourPlotEditinginPlotinGraphicalWindowMakingPlotfromWorkspaceWindowSavingPlotsThereareseveralwaystosaveplotscreatedinMATLAB:Iftheplotarecreatedwithprogrammingcodestoredinan Mfile,simplyrerunningthecodewillrecreatethefigureThefigurecanalsobesavedfromthefilemenu,usingthe SaveAs...option.Severalchoiceswillbeopened: Thefigurecanbesavedasa.figfile,whichisaMATLAB specificfieformat.Toretrievethefigure,justdoubleclick onthefilenameinthecurrentfolder.Youcandothesame thingprogrammaticallywiththecodeopen Thefigurecanbesavedinanumberofdifferentstandard graphicsformats,suchasjpeg(.jpg)andenhancedSummaryofChapterThemostcommonlyusedgraphinengineeringisthex– yplotThistwodimensionalplotcanbeusedtographdataorto visualizemathematicalfunctionsNomatterwhatagraphrepresents,itshouldalways includeatitleandxandyaxislabelsAxislabelsshouldbedescriptiveandshouldinclude units,suchasft/sorkJ/kgMATLABincludesextensive optionsforcontrollingtheappearanceofyourplotsTheusercanspecifythecolor,linestyle,andmarkerstyle foreachlineonagraphContinued….Inadditiontox–yplots,MATLABoffersavarietyof plottingoptions,includingpolarplots,piecharts,bar graphs,histograms,andx–ygraphswithtwoy–axesThescalingonx–yplotscanbemodifiedtoproduce logarithmicplotsoneitherorbothx–andyaxesEngineersoftenuselogarithmicscalingtorepresentdata asastraightlineThefunctionfplotallowstheusertoplotafunction withoutdefiningavectorofxandy–valuesMATLABautomaticallychoosestheappropriatenumberContinued….ThethreedimensionalplottingoptionsinMATLAB includealineplot,anumberofsurfaceplots,andcontour plotsMostoftheoptionsavailableintwodimensionalplotting alsoapplytothesethreedimensionalplotsThemeshgridfunctionisespeciallyusefulincreating threedimensionalsurfaceplotsInteractivetoolsallowtheusertomodifyexistingplotsThesetoolsareavailablefromthefiguremenubarPlotscanalsobecreatedwiththeinteractiveplotting optionfromtheworkspacewindow Chapter6UserDefinedFunctionsIntroductionTheMATLABprogramminglanguageisbuiltaround functionsAfunctionisapieceofcomputercodethatacceptsan inputargumentfromtheuserandprovidesoutputtothe programFunctionsallowustoprogramefficiently,enablingusto avoidrewritingthecomputercodeforcalculationsthatare performedfrequentlyForexample:mostcomputerprogramscontaina functionthatcalculatesthesineofanumber