This file is indexed.

/usr/lib/R/site-library/plotrix/INDEX is in r-cran-plotrix 3.2-6-1.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

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ablineclip		Display a line like abline but with specified ends
addtable2plot		Display a table on an existing plot
arctext			Display text on a circular arc
axis.break		Put a gap, slash or zigzag "break" in a plot axis
axis.mult		Display an axis with a multiplier
barNest			Nested bar plot
barNest.svymean		Nested bar plot for a svyby result
barNest.svyprop		Nested bar plot for a svyby result
barp			A variant of barplot
bin.wind.records	Classify wind direction and speed records
binciWl			Calculate a lower binomial confidence interval
binciWu			Calculate an upper binomial confidence interval
boxed.labels		Display text strings in boxes at specified positions
brkdn.plot		Display summary measures broken down by factors
brkdnNest		Calculate nested breakdowns of summary measures
bumpchart		Display a "bumps" chart
categoryReshape		Convert object/attribute pairs to a matrix
centipede.plot		Display a centipede plot/caterpillar plot/league table
clean.args		Remove arguments that would cause an error
clock24.plot		Plot values as lines/polygon/symbols on a "clockface"
clplot			Plot lines with colors corresponding to values
cluster.overplot	Display overlying points as clusters
color.gradient		Calculate values for a color gradient
color.id		Find the closest named color to a hexadecimal RGB code
color.legend		Display a color/value legend
color.scale		Transform numeric values into a series of colors
color.scale.lines	Display line segments with scaled colors
color2D.matplot		Display a numeric matrix as a color matrix
corner.label		Display a label in one corner of a plot
corner.loc		Find the location of a corner in a plot
count.overplot		Display overlying points as the number of points
cylindrect		Display a rectangle shaded to look like a cylinder
dendroPlot		Display the distributions of values as branched clusters
diamondplot		Display one or more polygons on a radial grid
dispbars		Display dispersion (error) bars
dotplot.mtb		Display a dotplot in MATLAB style
draw.arc		Display a circular arc
draw.circle		Display a circle on an existing plot
draw.ellipse		Display an ellipse on an existing plot
draw.tilted.sector	Display a single 3D pie sector
drawNestedBars		Display the nested bars for barNest
ehplot			Engelmann-Hecker plot
emptyspace		Find the largest empty space on a plot
fan.plot		Display a fan (superimposed pie sector) plot
feather.plot		Display vectors along a horizontal line
floating.pie		Display a flat pie chart at a specified position
fullaxis		Display an axis that runs to the edges of the plot
furc			Display a 'furcation' (split of a dendrogram)
gantt.chart		Display a Gantt chart with task priority colors
gap.barplot		Display a barplot with a range of values omitted
gap.boxplot		Display boxplots with one or two ranges omitted
gap.plot		Display a plot with a range of values omitted
get.breaks		Calculate the breakpoints for weighted.hist
get.gantt.info		Enter information for a Gantt chart
get.segs		Calculate the midpoints and limits for centipede.plot
get.soil.texture	Enter information for soil textures
get.triprop		Enter triplets of proportions or percentages
getFigCtr		Get the center of the current figure region in user units
getIntersectList	Enter the information for an intersection diagram
getMarginWidth		Calculate the margin width necessary to fit something
gradient.rect		Display a rectangle with an arbitrary color gradient
hexagon			Draw a hexagon
intersectDiagram	Graphically display set intersections
kiteChart		Display the rows of a matrix of values as polygon widths
labbePlot		Display a L'Abbe plot
ladderplot		Display a ladder plot
legendg			Display groups of fills or symbols in a legend
lengthKey		Key for interpreting lengths in a plot
listDepth		Find the maximum depth of a list
makeDendrite		Build a list of mutually exclusive attributes
makeIntersectList	Count set intersections
multhist		Plot a multiple histogram as a barplot
multsymbolbox		Draw boxes filled with symbols representing counts
oz.windrose		Display an Australian BoM wind rose
oz.windrose.legend	Display a wind rose legend in Australian BoM style
panes			Divide the graphics device in a "panel" layout
pasteCols		Paste the columns of a matrix together
paxis3d			Display enhanced axes on a 3D plot
pie.labels		Display flat pie chart labels
pie3D			Display a 3D pie chart
pie3D.labels		Display labels on a 3D pie chart
plot.dendrite		Display a dendrogram for a dendrite object
plotCI			Display confidence intervals/error bars
polar.plot		Plot values as lines/polygon/symbols on a 0-360 scale
polygon.shadow		Display a shadow effect for a polygon
propbrk			Calculate the proportion of a specified value in a vector
pyramid.plot		Display a pyramid (opposed horizontal bar) plot
radial.plot		Plot values as lines/polygon/symbols on radial scale
radial.plot.labels	Display labels at specified points on a radial plot
rectFill		Display a rectangle filled with symbols
remove.args		Remove specified arguments from argument list
rescale			Linearly scale a vector of numbers to a new range
revaxis			Plot with the values on the X or Y axis reversed
ruginv			Rug plot with inverse coloring
sizeplot		Display overlying points as larger points
sizetree		Display hierarchical categories as stacked rectangles
smoothColors		Build a vector of interpolated colors
soil.texture		Display a "soil texture triangle"
soil.texture.uk		Soil texture plot using UK conventions
soils			Soil texture data from 125 soils
spread.labels		Spread out labels for irregularly spaced values
spreadout		Spread out a vector of numbers to minimum intervals
stackpoly		Plot columns of numbers as overlaid polygons
staircase.plot		Plot successive values and increments as linked bars
staxlab			Display staggered labels on an axis
std.error		Calculate the conventional standard error
sumDendrite		Sum the first levels of counts in a dendrite list
sumbrk			Count the number of values equal to a specified value
symbolbarplot		Barplot with bars filled with symbols : height
symbolbox		Draw a box filled with symbols
tab.title		Display the plot title in a tab
taylor.diagram		Display a Taylor diagram
textbox			Display justified text in an optional box
thigmophobe		Find the direction away from the nearest other point
thigmophobe.labels	Place point labels away from the nearest other point
triax.abline		Display one or more lines across a triangle plot
triax.fill		Fill a three axis frame with smaller triangles
triax.frame		Display a three axis frame with optional grid
triax.plot		Display a triangle (three axis) plot
triax.points		Display triplets of values as points on a triangle plot
twoord.plot		Display a plot with two ordinates of different scales
twoord.stackplot	twoord.plot but with stacked bars
vectorField		Display magnitude/direction arrows on a plot
weighted.hist		Calculate and optionally display a weighted histogram
zoomInPlot		Display a plot and an expanded rectangular section of it