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space(GandBaccordingly).
Allvaluesforallcolorspacesarelimitedto[0,1].
RGBstands for Red,GreenandBlue;CMYstandsforCyan,MagentaandYellow;HSVstands for Hue,
Saturation,andValue;YIQisthecolormodelusedbytheU.S.CommercialColorTelevisionBroadcasting,
itisbasicallyanRGBrecodingwithdownwardcompatibilityforblackandwhitetelevision;XYZarethe
threeprimarycolorsofthecolormodeldenedbythe’CommissionInternationaledel’Eclairage’(CIE).For
moreinformationoncolormodelssee:
http://en.wikipedia.org/wiki/Color
space
Rgbformulae
For rgbformulae e three suitable e mapping g functions s have to o be chosen. . This s is done via a rgbformulae
<r>,<g>,<b>. The e available mapping functions s are listed by show w palette e rgbformulae. . Default
is 7,5,15,some other examples are3,11,6, , 21,23,3or r 3,23,21. . Negative e numbers, like3,-11,-6, mean
inverted color r (i.e. . 1-gray y passedinto the formula, see also positive (p. 141)andnegative (p. 141)
optionsbelow).
SomeniceschemesinRGBcolorspace
7,5,15
... traditional pm3d (black-blue-red-yellow)
3,11,6
... green-red-violet
23,28,3 ... . ocean n (green-blue-white); ; try also all other permutations
21,22,23 ... hot (black-red-yellow-white)
30,31,32 ... color r printable e on gray (black-blue-violet-yellow-white)
33,13,10 ... rainbow (blue-green-yellow-red)
34,35,36 ... AFM hot (black-red-yellow-white)
AfullcolorpaletteinHSVcolorspace
3,2,2
... red-yellow-green-cyan-blue-magenta-red
Pleasenotethatevenifcalledrgbformulaetheformulasmightactuallydeterminethe<H>,<S>,<V>or
<X>,<Y>,<Z>or... colorcomponentsasusual.
Usepositiveandnegativetoinvertthegurecolors.
Notethat it ispossibletondasetofthebestmatchingrgbformulaeforanyother colorscheme bythe
command
show palette fit2rgbformulae
Dened
Gray-to-rgbmappingcanbemanuallysetbyuseofpalettedened: Acolorgradientisdenedandused
togivethergbvalues. Suchagradientisapiecewiselinearmappingfromgrayvaluesin[0,1]totheRGB
space[0,1]x[0,1]x[0,1]. YoumustspecifythegrayvaluesandthecorrespondingRGBvaluesbetweenwhich
linearinterpolationwillbedone.
Syntax:
set palette e defined d { ( <gray1> <color1> {, <grayN> > <colorN>}... . ) }
<grayX> aregrayvalueswhicharemappedto[0,1]and<colorX>arethecorrespondingrgbcolors. . The
colorcanbespeciedinthreedierentways:
<color> := = { { <r> <g> <b> | ’<color-name>’ | ’#rrggbb’ ’ }
Eitherbythreenumbers(eachin[0,1])forred,greenandblue,separatedbywhitespace,orthenameofthe
colorinquotesorXstylecolorspeciersalsoinquotes. Youmayfreelymixthethreetypesinagradient
denition,butthenamedcolor"red"willbesomethingstrangeifRGBisnotselectedascolorspace. Use
showcolornamesforalistofknowncolornames.
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Pleasenote,thatevenifwrittenas<r>,thismightactuallybethe<H>componentinHSVcolorspaceor
<X>inCIE-XYZspace,or...dependingontheselectedcolormodel.
The<gray>valueshavetoformanascendingsequenceofrealnumbers;thesequencewillbeautomatically
rescaledto[0,1].
setpalettedened(withoutagradientdenitioninbraces)switchestoRGBcolorspaceandusesapreset
full-spectrumcolorgradient. Useshowpalettegradienttodisplaythegradient.
Examples:
Toproduceagraypalette(uselessbutinstructive)use:
set palette model RGB
set palette defined ( 0 "black", 1 "white" )
Toproduceablueyellowredpaletteuse(allequivalent):
set palette defined ( 0 "blue", 1 "yellow", 2 "red" )
set palette defined ( 0 0 0 1, 1 1 1 0, 2 1 0 0 )
set palette defined ( 0 "#0000ff", 1 "#ffff00", 2 "#ff0000" )
Toproducesomerainbow-likepaletteuse:
set palette defined ( 0 "blue", 3 "green", 6 "yellow", 10 "red" )
FullcolorspectrumwithinHSVcolorspace:
set palette model HSV
set palette defined ( 0 0 1 1, 1 1 1 1 )
set palette defined ( 0 0 1 0, 1 0 1 1, 6 0.8333 1 1, , 7 7 0.8333 0 1)
ApproximatethedefaultpaletteusedbyMATLAB:
set pal defined d (1 1 ’#00008f’, 8 ’#0000ff’, 24 ’#00ffff’, \
40 ’#ffff00’, 56 ’#ff0000’, 64 ’#800000’)
Toproduceapalettewithonlyafew,equally-spacedcolors:
set palette model RGB maxcolors 4
set palette defined ( 0 "yellow", 1 "red" )
’Traclight’palette(non-smoothcolorjumpsatgray=1/3and2/3).
set palette model RGB
set palette defined (0 "dark-green", 1 "green", \
1 "yellow",
2 "dark-yellow", , \
2 "red",
3 "dark-red" )
Functions
Useset palette e functions s <Rexpr>, , <Gexpr>, <Bexpr> todene threeformulaefortheR(gray),
G(gray)andB(gray)mapping.Thethreeformulaemaydependonthevariablegraywhichwilltakevalues
in[0,1]andshouldalsoproducevaluesin[0,1].Pleasenotethat<Rexpr>mightbeaformulafortheH-value
ifHSVcolorspacehasbeenchosen(sameforallotherformulaeandcolorspaces).
Examples:
Toproduceafullcolorpaletteuse:
set palette model HSV functions gray, 1, 1
Aniceblacktogoldpalette:
set palette model XYZ functions gray**0.35, gray**0.5, gray**0.8
Agamma-correctedblackandwhitepalette
gamma = 2.2
color(gray) = gray**(1./gamma)
set palette model RGB functions color(gray), color(gray), color(gray)
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Cubehelix
The"cubehelix"optiondenesafamilyofpalettesinwhichcolor(hue)variesalongthestandardcolorwheel
whileatthesametimethenetintensityincreasesmonotonicallyasthegrayvaluegoesfrom0to1.
D A Green (2011) http://arxiv.org/abs/1108.5083
startdenesthestartingpointalongthecolorwheelinradians.cyclesdeneshowmanycolorwheelcycles
spanthepaletterange.Largervaluesofsaturationproducemoresaturatedcolor;saturation>1maylead
toclippingoftheindividualRGBcomponentsandtointensitybecomingnon-monotonic.Thepaletteisalso
aectedbysetpalettegamma.Thedefaultvaluesare
set palette cubehelix start 0.5 cycles -1.5 saturation 1
set palette gamma 1.5
File
setpaletteleisbasicallyasetpalettedened(<gradient>)where<gradient>isreadfromadatale.
Either 4columns(gray,R,G,B)or just three columns(R,G,B) havetobeselectedviathe usingdatale
modier. Inthethreecolumncase,thelinenumberwillbeusedasgray. . Thegrayrangeisautomatically
rescaledto[0,1]. Theleisreadasanormaldatale,soalldatalemodiers s canbeused. . Pleasenote,
thatRmightactuallybee.g. HifHSVcolorspaceisselected.
Asusual<lename>maybe’-’whichmeansthatthedatafollowthecommandinlineandareterminated
byasingleeonalineofitsown.
Useshowpalettegradienttodisplaythegradient.
Examples:
ReadinapaletteofRGBtripleseachinrange[0,255]:
set palette file ’some-palette’ using ($1/255):($2/255):($3/255)
Equidistantrainbow(blue-green-yellow-red)palette:
set palette model RGB file "-"
0 0 1
0 1 0
1 1 0
1 0 0
e
Binarypalettelesaresupportedaswell,seebinarygeneral(p. 74). . Example: put64tripletsofR,G,B
doublesintolepalette.binandloaditby
set palette file "palette.bin" binary record=64 using g 1:2:3
Gammacorrection
Forgraymappingsgammacorrectioncanbeturnedonby setpalette gamma<gamma>. . <gamma>
defaultsto1.5whichisquitesuitableformostterminals.
The gammacorrectionis appliedto the cubehelix color palettefamily, but not toother palette coloring
schemes. However,youmayeasilyimplementgammacorrectionforexplicitcolorfunctions.
Example:
set palette model RGB
set palette functions gray**0.64, gray**0.67, gray**0.70
To use gamma correction with interpolated gradients s specify intermediate gray y values s withappropriate
colors. Insteadof
set palette defined ( 0 0 0 0, 1 1 1 1 )
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usee.g.
set palette defined ( 0 0 0 0, 0.5 .73 .73 .73, 1 1 1 1 1 1 )
orevenmoreintermediatepointsuntilthelinearinterpolationtsthe"gammacorrected"interpolationwell
enough.
Postscript
Inorderto reduce thesize of postscriptles,thegrayvalue andnotall threecalculatedr,g,bvalues s are
writtento the le. . Thereforethe e analytical formulae are codeddirectly inthe postscript language as a
headerjustbeforethepm3ddrawing,see/gand/cFdenitions. Usually,itmakes s sensetowritetherein
denitionsofonlythe3formulaeused.Butformultiplotoranyotherreasonyoumaywanttomanuallyedit
thetransformationsdirectlyinthepostscriptle. Thisisthedefaultoptionnops
allcF.Usingtheoption
ps
allcFwritespostscriptdenitionsofallformulae. Thisyoumayndinterestingifyouwanttoeditthe
postscriptleinorder tohavedierent palettes for dierentsurfacesinonegraph. . Well,youcanachieve
thisfunctionalitybymultiplotwithxedoriginandsize.
If pm3dmaphas beenplotted d from m griddedor almost regular datawithanoutput to a postscript le,
thenitispossibletoreducethesizeofthis postscriptleuptoatabout 50%bytheenclosedawkscript
pm3dCompress.awk.Thisyoumayndinterestingifyouintendtokeeptheleforincludingitintoyour
publicationorbeforedownloadingaverylargeleintoaslowprinter. Usage:
awk -f pm3dCompress.awk thefile.ps >smallerfile.ps
Ifpm3dmaphasbeenplottedfromrectangulargriddeddatawithanoutputtoapostscriptle,thenitis
possibletoreducethelesizeevenmorebytheenclosedawkscriptpm3dConvertToImage.awk. Usage:
awk -f pm3dConvertToImage.awk <thefile.ps >smallerfile.ps
Youmaymanuallychangethepostscriptoutputfromgraytocolorandviceversaandchangethedenition
of<maxcolors>.
Pointintervalbox
Thepointintervalpropertyoflinetypesisusedinplotstylelinespoints.Anegativevalueofpointinterval,
e.g.-N,meansthatpointsymbolsaredrawnonlyforeveryNthpoint,andthatabox(actuallycircle)behind
eachpointsymbolisblankedoutbyllingwiththebackgroundcolor.Thecommandsetpointintervalbox
controlstheradiusofthisblanked-outregion. Itisamultiplierforthedefaultradius,whichisequaltothe
pointsize.
Pointsize
Thesetpointsizecommandscalesthesizeofthepointsusedinplots.
Syntax:
set pointsize <multiplier>
show pointsize
Thedefaultisamultiplierof1.0. Largerpointsizesmaybeusefultomakepointsmorevisibleinbitmapped
graphics.
Thepointsizeofasingleplotmaybechangedontheplotcommand. Seeplotwith(p. 91)fordetails.
Pleasenotethatthepointsizesettingisnotsupportedbyallterminaltypes.
Polar
Thesetpolarcommandchangesthemeaningoftheplotfromrectangularcoordinatestopolarcoordinates.
Syntax:
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145
set polar
unset polar
show polar
Inpolar coordinates,thedummyvariable (t) is anangle. . Thedefault t rangeoft is [0:2*pi],or,if degree
unitshavebeenselected,to[0:360](seesetangles(p.97)).
The commandunset t polar r changes the meaningof the plotback tothedefault rectangular coordinate
system.
Thesetpolarcommandisnotsupportedforsplots. Seethesetmapping(p.127)commandforsimilar
functionalityforsplot(p.169)s.
Whileinpolarcoordinatesthemeaningofanexpressionintisreallyr=f(t),wheretisanangleofrotation.
Thetrange controls the domain(theangle) of thefunction. . The e r,x andyranges controltheextent of
thegraphinthexandydirections. Eachoftheseranges,aswellastherrange,maybeautoscaledorset
explicitly. Fordetails,seesetrrange(p. 146)andsetxrange(p. 161).
Example:
set polar
plot t*sin(t)
set trange [-2*pi:2*pi]
set rrange [0:3]
plot t*sin(t)
Therstplotusesthedefaultpolarangulardomainof0to2*pi.Theradiusandthesizeofthegraphare
scaledautomatically. Thesecondplotexpandsthedomain,andrestrictsthesizeofthegraphtothearea
within3unitsoftheorigin.Thishastheeectoflimitingxandyto[-3:3].
Youmaywanttoset size e squaretohavegnuplottry tomaketheaspectratioequaltounity,sothat
circleslookcircular. Seealso
polar demos (polar.dem)
and
polar data plot (poldat.dem).
Print
Thesetprintcommandredirectstheoutputoftheprintcommandtoale.
Syntax:
set print
set print "-"
set print "<filename>"
set print "<filename>" append
set print "|<shell_command>"
Without "<lename>", , the e output le is restored d to <STDERR>.
The <lename> "-" means
<STDOUT>. The e append  ag causes the le to be opened d in appendmode. . A A <lename> starting
with"j"isopenedasapipetothe<shell
command>onplatformsthatsupportpiping.
Psdir
The set psdir r <directory> > commandcontrols the searchpathusedby the postscript terminaltond
prologue.ps andcharacter encodingles. . Youcanusethis s mechanismtoswitchbetweendierent sets of
locally-customizedprologles. Thesearchorderis
1) The directory specified by ‘set psdir‘, if any
2) The directory specified by environmental variable e GNUPLOT_PS_DIR
3) A built-in header or one from the default system directory
4) Directories s set t by ‘set loadpath‘
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gnuplot4.6
Raxis
Thecommandssetraxisandunsetraxistogglewhetherthepolaraxisisdrawnseparatelyfromgridlines
andthexaxis.Iftheminimumofthecurrentrrangeisnon-zero(andnotautoscaled),thenawhitecircleis
drawnatthecenterofthepolarplottoindicatethattheplotlinesandaxesdonotreach0.Theaxislineis
drawnusingthesamelinetypeastheplotborder. Seepolar r (p.144),rrange (p.146),rtics(p.146),
setgrid(p. 117).
Rmargin
Thecommandsetrmarginsetsthesizeoftherightmargin. Pleaseseesetmargin(p. 127)fordetails.
Rrange
Thesetrrangecommandsetstherangeoftheradialcoordinateforagraphinpolarmode. Thishasthe
eectofsettingbothxrangeandyrangeaswell. Theresultingxrangeandyrangeareboth[-(rmax-rmin):
+(rmax-rmin)].Howeverifyoulaterchangethexoryrange,forexamplebyzooming,thisdoesnotchange
rrange,sodatapointscontinuetobeclippedagainstrrange. Autoscalingofrminalwaysresultsinrmin=
0.
Rtics
Thesetrticscommandplacesticsalongthepolaraxis. Thesewillonlybeshowninpolarplotmode. The
ticsandlabelsaredrawntotherightoftheorigin. Themirrorkeywordcausesthemtobedrawnalsoto
theleftoftheorigin. Seepolar(p.144),andseesetxtics(p.163)fordiscussionofotherkeywords.
Samples
Thesamplingrateoffunctions,orforinterpolatingdata,maybechangedbythesetsamplescommand.
Syntax:
set samples <samples_1> {,<samples_2>}
show samples
Bydefault,samplingissetto100points. Ahighersamplingratewillproducemoreaccurateplots,butwill
takelonger.Thisparameterhasnoeectondataleplottingunlessoneoftheinterpolation/approximation
options is used. . See e plot smooth(p. 81)re 2D dataandset cntrparam (p. 104) andset dgrid3d
(p. 110)re3Ddata.
Whena2Dgraphisbeingdone,onlythevalueof<samples
1>isrelevant.
Whenasurfaceplotisbeingdonewithout theremovalofhiddenlines,thevalueofsamples speciesthe
numberofsamplesthataretobeevaluatedfortheisolines. Eachiso-vlinewillhave<sample
1>samples
andeachiso-ulinewillhave<sample
2>samples. Ifyouonlyspecify<samples
1>,<samples
2>willbe
settothesamevalueas<samples
1>. Seealsosetisosamples(p. 119).
Size
Syntax:
set size {{no}square | ratio <r> | noratio} {<xscale>,<yscale>}
show size
The<xscale>and<yscale>valuesarescalefactorsforthesizeoftheplot,whichincludesthegraph,labels,
andmargins.
Importantnote:
gnuplot4.6
147
In earlier versions of gnuplot, some terminal types used the values from
‘set size‘ to control also the size of the output canvas; others did not.
In version 4.6 6 almost t all terminals now follow the following convention:
setterm<terminal
type> size <XX>,<YY>controlsthesizeoftheoutputle,orcanvas. . Please
seeindividualterminaldocumentationforallowedvaluesofthesizeparameters. Bydefault,theplotwillll
thiscanvas.
setsize<XX>,<YY>scalestheplotitselfrelativetothesizeofthecanvas. Scalevalueslessthan1will
causetheplottonotlltheentirecanvas. Scalevalueslargerthan1willcauseonlyaportionoftheplot
totonthecanvas. Pleasebeawarethatsettingscalevalueslargerthan1maycauseproblems s onsome
terminaltypes.
ratiocausesgnuplottotrytocreateagraphwithanaspectratioof<r>(theratioofthey-axislengthto
thex-axislength)withintheportionoftheplotspeciedby<xscale>and<yscale>.
Themeaningofanegativevaluefor<r>isdierent. If<r>=-1,gnuplottriestosetthescalessothatthe
unithasthesamelengthonboththexandyaxes.Thisisequivalenttosetviewequalxy. Seesetview
equal(p.159). If<r>=-2,theunitonyhastwicethelengthoftheunitonx,andsoon.
Thesuccessofgnuplotinproducingtherequestedaspectratiodependsontheterminalselected.Thegraph
areawillbethelargestrectangleofaspectratio<r> thatwilltintothespeciedportionoftheoutput
(leavingadequatemargins,ofcourse).
squareisasynonymforratio1.
Bothnoratioandnosquarereturnthegraphtothedefaultaspectratiooftheterminal,butdonotreturn
<xscale>or<yscale>totheirdefaultvalues(1.0).
ratioandsquare havenoeecton3Dplots,butdoaect 3D projections createdusing setview map.
Seealsosetviewequal(p. 159),whichforcesthexandyaxesofa3Dontothesamescale.
Examples:
Tosetthesizesothattheplotllstheavailablecanvas:
set size 1,1
Tomakethegraphhalfsizeandsquareuse:
set size square e 0.5,0.5
Tomakethegraphtwiceashighaswideuse:
set size ratio o 2
Style
Defaultplottingstyles arechosenwiththe setstyle dataandset style functioncommands. . Seeplot
with(p.91)forinformationabouthowtooverridethedefaultplottingstyleforindividualfunctionsand
datasets.Seeplottingstyles(p.43)foracompletelistofstyles.
Syntax:
set style function <style>
set style data a <style>
show style function
show style data
Defaultstylesforspecicplottingelementsmayalsobeset.
Syntax:
set style arrow w <n> > <arrowstyle>
set style fill l <fillstyle>
set style histogram <histogram style options>
set style line e <n> > <linestyle>
148
gnuplot4.6
Ifgnuplotwasbuiltwiththesupportofobjects,thenthefollowingoptionsarealsoavailable:
Syntax:
set style rectangle <object options> <linestyle> <fillstyle>
set style circle radius <size> {clip|noclip}
set style ellipse size <size> units {xy|xx|yy} {clip|noclip}
Set stylearrow
Eachterminalhas adefaultsetofarrowandpointtypes,whichcanbeseenbyusingthecommandtest.
setstylearrowdenesasetofarrowtypesandwidthsandpointtypesandsizessothatyoucanreferto
themlaterbyanindexinsteadofrepeatingalltheinformationateachinvocation.
Syntax:
set style arrow w <index> > default
set style arrow w <index> > {nohead | head | heads}
{size <length>,<angle>{,<backangle>}}
{filled | empty | nofilled}
{front | back}
{ {linestyle | ls <line_style>}
| {linetype | lt <line_type>}
{linewidth | lw <line_width} }
unset style arrow
show style arrow
<index>isanintegerthatidentiesthearrowstyle.
Ifdefaultisgivenallarrowstyleparametersaresettotheirdefaultvalues.
Ifthelinestyle<index>alreadyexists,onlythegivenparametersarechangedwhileallothersarepreserved.
Ifnot,allundenedvaluesaresettothedefaultvalues.
Specifyingnoheadproduces arrowsdrawnwithoutahead|alinesegment. . This s gives youyetanother
waytodrawalinesegmentontheplot. Bydefault,arrowshaveonehead. Specifyingheadsdrawsarrow
headsonbothendsoftheline.
Headsizecanbecontrolledbysize<length>,<angle>orsize<length>,<angle>,<backangle>,where
<length>deneslengthofeachbranchofthearrowheadand<angle>theangle(indegrees)theymake
withthearrow. <Length> > isinx-axis units;this canbechangedby rst,second, , graph,screen,or
characterbeforethe<length>;seecoordinates(p.22)fordetails. <Backangle>onlytakeseectwhen
lledoremptyisalsoused.Then,<backangle>istheangle(indegrees)thebackbranchesmakewiththe
arrow(inthesamedirectionas<angle>).Thegterminalhasarestrictedbackanglefunction.Itsupports
threedierent angles. . Therearetwothresholds: : Below70degrees,thearrowheadgetsanindentedback
angle. Above110degrees,thearrowheadhasanacutebackangle.Betweenthesethresholds,thebackline
isstraight.
Specifying lledproduces lledarrowheads s (if heads are used). . Filling g is supported onlled-polygon
capableterminals,seehelpofpm3d(p. 136)fortheirlist,otherwisethearrowheadsareclosedbutnot
lled.Thesameresult(closedbutnotlledarrowhead)isreachedbyspecifyingempty.Further,llingand
outlineisobviouslynotsupportedonterminalsdrawingarrowsbytheirownspecicroutines,likemetafont,
metapost,latexortgif.
The line style may be selected d from m a user-dened d list t of line styles s (see set style line e (p. 151)) ) or
maybedenedherebyprovidingvaluesfor<line
type>(anindexfromthedefaultlistofstyles)and/or
<line
width>(whichisamultiplierforthedefaultwidth).
Note,however,thatifauser-denedlinestylehasbeenselected,itsproperties(typeandwidth)cannotbe
alteredmerelybyissuinganothersetstylearrowcommandwiththeappropriateindexandltorlw.
Iffrontisgiven,thearrowsarewrittenontopofthegrapheddata.Ifbackisgiven(thedefault),thearrow
iswrittenunderneaththegrapheddata. Usingfront t willpreventaarrowfrom beingobscuredbydense
data.
gnuplot4.6
149
Examples:
Todrawanarrowwithoutanarrowheadanddoublewidth,use:
set style arrow w 1 1 nohead lw 2
set arrow arrowstyle 1
Seealsosetarrow(p.97)forfurtherexamples.
Boxplot
Thesetstyleboxplotcommandallowsyoutochangethelayoutofplotscreatedusingtheboxplotplot
style.
Syntax:
set style boxplot {range <r> | fraction <f>}
{{no}outliers} {pointtype <p>}
{candlesticks | financebars}
{separation <x>}
{labels off | auto | x | x2}
{sorted | unsorted}
Theboxintheboxplotalwaysspanstherangeofvaluesfromtherstquartiletothethirdquartileofthe
datapoints. Thelimitofthewhiskersthatextendfromtheboxcanbecontrolledintwodierentways. By
defaultthewhiskersextendfromeachendoftheboxforarangeequalto1.5timestheinterquartilerange
(i.e. theverticalheightoftheboxproper). Eachwhiskeristruncatedbacktowardthemediansothat t it
terminatesatayvaluebelongingtosomepointinthedataset.Sincetheremaybenopointwhosevalueis
exactly1.5timestheinterquartiledistance,thewhiskermaybeshorterthanitsnominalrange.Thisdefault
correspondsto
set style boxplot range 1.5
Alternatively,youcanspecifythefractionofthetotalnumberofpointsthatthewhiskersshouldspan. In
this case the range is extendedsymmetrically from the medianvalueuntilit encompasses therequested
fractionofthedataset. Hereagaineachwhiskerisconstrainedtoendatapointinthedataset. . Tospan
95%ofthepointsintheset
set style boxplot fraction 0.95
Anypointsthatlieoutsidetherangeofthewhiskersareconsideredoutliers. Bydefaultthesearedrawnas
individualcircles(pointtype7). Theoptionnooutliersdisablesthis.
Bydefaultboxplotsaredrawninastylesimilartocandlesticks,butyouhavetheoptionofusinginsteada
stylesimilartonancebars.
Iftheusingspecicationforaboxplotcontainsafourthcolumn,thevaluesinthatcolumnwillbeinterpreted
asthediscretelevelesofafactorvariable. Inthiscasemorethanoneboxplotsmaybedrawn,asmanyas
thenumberoflevelsofthefactor variable. . Theseboxplotswillbedrawnnext t toeachother,thedistance
betweenthemis1.0bydefault(inx-axisunits). Thisdistancecanbechangedbytheoptionseparation.
The labels optiongoverns s how and where e these e boxplots (each representinga a part of f the e dataset) ) are
labeled. Bydefaultthevalueofthefactorisputasaticklabelonthehorizontalaxis{xorx2,depending
onwhichoneisusedfortheplotitself. Thissettingcorrespondstooptionlabels auto. Thelabelscanbe
forcedtouseeitherofthexorx2axes {optionslabels xandlabels x2,respectively {,ortheycanbe
turnedoaltogetherwiththeoptionlabelso.
By default t the e boxplots corresponding to dierent levels of the factor variable are not sorted; they will
bedrawninthesameorder thelevels areencounteredinthedatale. . Thisbehaviorcorresponds s tothe
unsortedoption. Ifthesortedoptionisactive,thelevelsarerstsortedalphabetically,andtheboxplots
aredrawninthesortedorder.
Theseparation,labels,sortedandunsortedoptiononlyhaveaneectifafourthcolumnisgiventhe
plotspecication.
Seeboxplot(p.45),candlesticks(p.46),nancebars (p.49).
150
gnuplot4.6
Set styledata
Thesetstyledatacommandchangesthedefaultplottingstylefordataplots.
Syntax:
set style data a <plotting-style>
show style data
Seeplottingstyles(p.43)forthechoices.Ifnochoiceisgiven,thechoicesarelisted. show style data
showsthecurrentdefaultdataplottingstyle.
Set stylell
The set t style e ll command is used to o set the e default style of the e plot t elements in plots with boxes,
histograms,candlesticksandlledcurves. Thisdefaultcanbesupersededbyllstylesattachedtoindividual
plots. Seealso’setstylerectangle’.
Syntax:
set style fill l {empty
| {transparent} solid {<density>}
| {transparent} pattern {<n>}}
{border {lt} {lc <colorspec>} | noborder}
Thedefaultllstyleisempty.
Thesolidoptioncausesllingwithasolidcolor,iftheterminalsupportsthat. The<density>parameter
speciestheintensityofthellcolor.Ata<density>of0.0,theboxisempty,at<density>of1.0,theinner
areais ofthesamecolorasthecurrentlinetype. . Someterminaltypes s canvarythe densitycontinuously;
othersimplementonlyafewlevelsofpartialll. Ifno<density>parameterisgiven,itdefaultsto1.
Thepatternoptioncausesllingtobedonewithallpatternsuppliedbytheterminaldriver. Thekind
andnumberofavailablellpatternsdependontheterminaldriver. Ifmultipledatasetsusinglledboxes
areplotted,thepatterncyclesthroughallavailablepatterntypes,startingfrompattern<n>,muchasthe
linetypecyclesformultiplelineplots.
Theemptyoptioncauseslledboxesnottobelled. Thisisthedefault.
Bydefault,border,theboxisboundedbyasolidlineofthecurrentlinetype. border<colorspec>allows
youtochangethecoloroftheborder.noborderspeciesthatnoboundinglinesaredrawn.
Set style e ll transparent t Some e terminals support the attribute transparent forlledareas. . Inthe
caseoftransparentsolidllareas,thedensityparameterisinterpretedasanalphavalue;thatis,density0
isfullytransparent,density1isfullyopaque.Inthecaseoftransparentpatternll,thebackgroundofthe
patterniseitherfullytransparentorfullyopaque.
Terminal
solid
pattern pm3d
gif
no
yes
no
jpeg
yes
no
yes
pdf
yes
yes
yes
png
TrueColor
index
yes
post
no
yes
no
svg
yes
no
yes
win
yes
yes
yes
wxt
yes
yes
yes
x11
no
yes
no
Notethattheremaybeadditionallimitationsonthecreationorviewingofgraphs containingtransparent
llareas.Forexample,thepngterminalcanonlyusetransparentllifthe"truecolor"optionisset. Some
pdf viewers s may not t correctly display the e ll l areas even if f they are correctly described inthe e pdf f le.
Ghostscript/gvdoesnotcorrectlydisplaypattern-llareaseventhoughactualPostScriptprintersgenerally
havenoproblem.
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