Lec. 5: Customized Plot using Grid Packagestatistics.ssu.ac.kr/.../Lecture_PPT_files/lec5.pdf · 5....
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Lec. 5: Customized Plot using Grid Package Instructor: SANG-HOON CHO DEPT. OF STATISTICS AND ACTUARIAL SCIENCES Soongsil University 1 / 39
Transcript of Lec. 5: Customized Plot using Grid Packagestatistics.ssu.ac.kr/.../Lecture_PPT_files/lec5.pdf · 5....
Lec. 5: Customized Plot using Grid Package
Instructor: SANG-HOON CHO
DEPT. OF STATISTICS AND ACTUARIAL SCIENCES
Soongsil University
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5. Controlling the Appearance of Output
All graphical primitives functions (and the viewport() function) havea gp argument that can be used to provide a set of graphicalparameters to control the appearance of the graphical output
There is a fixed set of graphical parameters summarized in thenext page, all of which can be specified for all types of graphicaloutput
get.gpar() #show current graphical parameter settings
get.gpar(c("lty", "fill"))
gpar(col="red", lty="dashed")
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5. Controlling the Appearance of Output
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5. Controlling the Appearance of Output
Exercise 1
다음코드를실행해보세요
grid.rect(gp=gpar(col="grey50", lwd = 20))
pushViewport(viewport(gp=gpar(fontsize=10, background = "transparent")))
grid.rect(x=0.33, height=0.7, width=0.2, gp=gpar(fill="black"))
grid.rect(x=0.66, height=0.7, width=0.2)
grid.text("grid.rect()", x=0.66, rot=90)
grid.text("grid.rect(gp=gpar(fill="black"))", x=0.33, rot=90,gp=gpar(fontsize=8, col="white"))
popViewport()
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5. Controlling the Appearance of Output
grid.rect()
grid.rect(gp=gpar(fill="black"))
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5. Controlling the Appearance of Output
The values that can be specified for colors, line types, line widths,line ends, line joins, and fonts are mostly the same as for thetraditional graphics system
In many cases, the graphical parameter in grid also has the samename as the traditional graphics state setting (e.g., col), thoughseveral of the grid parameters are slightly more verbose (e.g.lineend and fontfamily)
Some other differences in the specification of graphical parametervalues in the grid graphics system are described below
fontface: fontface value can be a string instead of an integer
cex: cex value is cumulative, i.e., multiplied by the previous cexvalue to obtain a current cex value
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5. Controlling the Appearance of Output
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5. Controlling the Appearance of Output
Exercise 2
다음코드를실행해보세요
pushViewport(viewport(gp=gpar(cex=0.5)))
grid.text("How small do you think?", gp=gpar(cex=0.5))
grid.newpage() #erases the current device or moves to a new page.
pushViewport(viewport(gp=gpar(cex=3)))
grid.text("How small do you think?", gp=gpar(cex=0.5))
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5. Controlling the Appearance of Output
All graphical parameter settings may be vector values
grid.rect(gp=gpar(col="grey50", lwd = 10))
levels <- round(seq(90, 10, length=25))
greys <- paste("grey", c(levels, rev(levels)), sep="")
grid.circle(x=seq(0.1, 0.9, length=100),y=0.5 + 0.4*sin(seq(0, 2*pi, length=100)),r=abs(0.1*cos(seq(0, 2*pi, length=100))),gp=gpar(col=greys))
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5. Controlling the Appearance of Output
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5. Viewports
A viewport is a rectangular region that provides a context fordrawing
A viewport provides a drawing context consisting of both ageometric context and a graphical context
A geometric context consists of a set of coordinate systems forlocating and sizing output and all of the coordinate systemsareavailable within every viewport
A graphical context consists of explicit graphical parameter settingsfor controlling the appearance of output
This is specified as a gpar object via the gp argument
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5. Viewports
A new viewport is created using the viewport() function
A viewport has a location (given by x and y), a size (given by widthand height), and it is justified relative to its location (according tothe value of the just argument)
The result of the viewport() function is an object of classviewport
No region has actually been created on a graphics device
In order to create regions on a graphics device, a viewport objectmust be pushed onto the device
> viewport(x=unit(0.4, "npc"), y=unit(1, "cm"),width=stringWidth("very very snug indeed"),height=unit(6, "lines"),just=c("left", "bottom"))
viewport[GRID.VP.17]
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5. Viewports
The location and size of a viewport are specified in units, so aviewport can be positioned and sized within another viewport in avery flexible manner
vp1 <-viewport(x=unit(0.4, "npc"), y=unit(1, "cm"),
width=stringWidth("very very snug indeed"),height=unit(6, "lines"),just=c("left", "bottom")) #graphical object
grid.show.viewport(scale.col="grey", border.fill="white",vp.col="black", vp.fill="grey", vp1, newpage=FALSE)
pushViewport(viewport(.5, .5, .8, .8))
pushViewport(vp1)
grid.rect( gp = gpar(background = "transparent"))
grid.text("very very snug indeed",gp=gpar(col="white"))
popViewport(2) #Why need it?
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5. Viewports
0 1
0
1 1strwidth
6lines
0.4npc
1cm
very very snug indeed
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5. Viewports
The pushViewport() function takes a viewport object and uses itto create a region on the graphics device
This region becomes the drawing context for all subsequentgraphical output, until the region is removed or another region isdefined
grid.rect(gp=gpar(col="grey"))grid.text("top-left corner", x=unit(1, "mm"),
y=unit(1, "npc") - unit(1, "mm"),just=c("left", "top"))
pushViewport(viewport(width=0.8, height=0.5, angle=10,name="vp1"))
grid.rect(gp = gpar(background = "transparent"))grid.text("top-left corner", x=unit(1, "mm"),
y=unit(1, "npc") - unit(1, "mm"),just=c("left", "top"))
pushViewport(viewport(width=0.8, height=0.5, angle=10,name="vp2"))
grid.rect(gp = gpar(background = "transparent"))grid.text("top-left corner", x=unit(1, "mm"),
y=unit(1, "npc") - unit(1, "mm"),just=c("left", "top"))
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5. Viewports
top-left corner
top-left corner
top-left corner
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5. Viewports
The popViewport() function removes the current viewport and thedrawing context reverts to whatever it was before the currentviewport was pushed
The popViewport() function has an integer argument n thatspecifies how many viewports to pop
The default is 1, but several viewports can be popped at once byspecifying a larger value
The upViewport() function is similar to popViewport() in that thedrawing context reverts to whatever it was prior to the currentviewport being pushed
The difference is that upViewport() does not remove the currentviewport from the device
A viewport can be revisited using the downViewport() function
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5. Viewports
Exercise 3
마지막으로실행했던코드에이어아래의코드를실행해보세요!
#popViewport()grid.text("bottom-right corner",
x=unit(1, "npc") - unit(1, "mm"),y=unit(1, "mm"), just=c("right", "bottom"))
#upViewport()grid.text("bottom-right corner",
x=unit(1, "npc") - unit(1, "mm"),y=unit(1, "mm"), just=c("right", "bottom"))
downViewport("vp1")grid.rect(width=unit(1, "npc") + unit(2, "mm"),
height=unit(1, "npc") + unit(2, "mm"))
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5. Viewports
top-left corner
top-left corner
top-left corner
bottom-right corner
bottom-right corner
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5. Viewports
Exercise 4
Drawing can be restricted to only the interior of the currentviewport (clipped to the viewport) by specifying the clip argumentto the viewport() function
three values: on, inherit, off
다음코드를실행해보고 clip arguement의각 value가의미하는것을생각해보세요!
grid.rect(gp=gpar(col="grey"))pushViewport(viewport(w=.5, h=.5, clip="on"))grid.rect()grid.circle(r=.7, gp=gpar(lwd=20))
pushViewport(viewport(clip="inherit"))grid.circle(r=.7, gp=gpar(lwd=10, col="grey"))
pushViewport(viewport(clip="off"))grid.circle(r=.7)popViewport(3)
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5. Viewports
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5. Viewports
A viewport can have a layout specified via the layout argument
It divides the viewport region into several columns and rows,where each column can have a different width and each row canhave a different height
For several reasons, layouts are very flexible in grid: there aremany more coordinate systems for specifying the widths ofcolumns and the heights of rows; viewports can occupyoverlapping areas within the layout; and each viewport within theviewport tree can have a layout (layouts can be nested)
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5. Viewports
Exercise 5: Simple Layout
다음코드를실행해보세요!
vplay <- grid.layout(3, 3,respect=rbind(c(0, 0, 0),
c(0, 1, 0),c(0, 0, 0)))
grid.show.layout( vplay )
grid.newpage()pushViewport(viewport(layout=vplay))pushViewport(viewport(layout.pos.row = 1, layout.pos.col = 1))grid.rect( gp = gpar( fill = 2) )upViewport()
pushViewport(viewport(layout.pos.row = 2, layout.pos.col = 2))grid.rect( gp = gpar( fill = 3) )upViewport()
pushViewport(viewport(layout.pos.row = 3, layout.pos.col = 3))grid.rect( gp = gpar( fill = 4) )upViewport()
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5. Viewports
(1, 1)1null
1null
(1, 2)
1null
(1, 3) 1null
1null
(2, 1)1null (2, 2) (2, 3) 1null
(3, 1)1null
1null
(3, 2)
1null
(3, 3)
1null
1null
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5. Viewports
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5. Viewports
Exercise 6: Layout with Units
다음코드를실행해보세요!
unitlay <-grid.layout(3, 3,
widths=unit(c(1, 1, 2),c("inches", "null", "null")),
heights=unit(c(3, 1, 1),c("lines", "null", "null")))
grid.show.layout( unitlay )
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5. Viewports
(1, 1)3lines
1inches
(1, 2)
1null
(1, 3) 3lines
2null
(2, 1)1null (2, 2) (2, 3) 1null
(3, 1)1null
1inches
(3, 2)
1null
(3, 3)
2null
1null
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5. Viewports
Exercise 7
다음코드를실행해보세요!
labelvp <- function(name, col="grey", tcol="white", clipOff=TRUE) {seekViewport(name)if (clipOff)
pushViewport(viewport(clip="off"))grid.rect(gp=gpar(col=col, lwd=5))grid.rect(x=0, y=1, width=unit(1, "strwidth", name) + unit(2, "mm"),
height=unit(1, "lines"), just=c("left", "top"),gp=gpar(fill=col, col=NULL))
grid.text(name, x=unit(1, "mm"), y=unit(1, "npc") - unit(1, "mm"),just=c("left", "top"), gp=gpar(col=tcol))
upViewport(0)}
vplay <- grid.layout(3, 3,respect=rbind(c(0, 0, 0),
c(0, 1, 0),c(0, 0, 0)))
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5. Viewports
pushViewport(viewport(width=0.95, height=0.95))grid.rect(gp=gpar(col="light grey"))pushViewport(viewport(layout=vplay))
pushViewport(viewport(layout.pos.col=2, name="col2"))upViewport()pushViewport(viewport(layout.pos.row=2, name="row2"))
labelvp("col2", "black")labelvp("row2")
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5. Viewports
col2
row2
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5. Viewports
Exercise 8
다음코드를실행해보세요!
gridfun <- function() {pushViewport(viewport(layout=grid.layout(1, 2)))pushViewport(viewport(layout.pos.col=1))grid.rect()grid.text("black")grid.text("&", x=1)popViewport()pushViewport(viewport(layout.pos.col=2, clip="on"))grid.rect(gp=gpar(fill="black"))grid.text("white", gp=gpar(col="white"))grid.text("&", x=0, gp=gpar(col="white"))popViewport(2)
}
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5. Viewports
grid.rect(gp=gpar(col="grey"))w <- unit(1, "npc") - unit(15, "mm")x <- unit.c(unit(5, "mm"),
unit(5, "mm") + 1/3*w,unit(5, "mm") + 1/3*w + unit(5, "mm"),unit(1, "npc") - unit(5, "mm"))
y <- unit.c(unit(5, "mm"),unit(5, "mm") + 2/3*w,unit(5, "mm") + 2/3*w + unit(5, "mm"),unit(1, "npc") - unit(5, "mm"))
grid.segments(x, 0, x, 1,gp=gpar(col="grey", lty="dashed"))
grid.segments(0, y, 1, y,gp=gpar(col="grey", lty="dashed"))
pushViewport(viewport(
layout=grid.layout(5, 5,widths=unit(c(5, 1, 5, 2, 5),
c("mm", "null", "mm","null", "mm")),
heights=unit(c(5, 1, 5, 2, 5),c("mm", "null", "mm",
"null", "mm")))))pushViewport(viewport(layout.pos.col=2, layout.pos.row=2))gridfun()popViewport()pushViewport(viewport(layout.pos.col=4, layout.pos.row=4))gridfun()popViewport(2)
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5. Viewports
black & white&
black & white&
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5. Viewports
Exercise 9
Vignettes from package ‘grid’ packagehttps://stat.ethz.ch/R-manual/R-devel/library/grid/doc/index.html
Read “Writing grid Code” and try the codes in the vignette!
Read “Rotated Viewports” and try the codes in the vignette!
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5. Viewports
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5. Viewports
Exercise 10
Read Vignettes of “grImport” packagehttps://cran.r-project.org/web/packages/grImport/index.html
Then try the code in “figure.R” in the zip file “special.zip” (아래의.eps그림파일을인터넷에서파운로드받아그림을그려본예)
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5. Viewports
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5. Viewports
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