| Parameter | par Only | Meaning | Values *=default value RO=Read Only |
|---|---|---|---|
| adj | no | The way in which text strings are justified in text, mtext and title | 0=Left justified; *0.5=Centered; 1=Right Justified |
| ann | no | Determines whether to annotate output with axis labels and overall title. | FALSE=Do not annotate; *TRUE=Annotate |
| ask | yes | Determines if user is asked to click graph to see new output | *FALSE=Do not ask user; TRUE=Ask user |
| bg | no | Background color for device | Color value; *"white" |
| bty | no | Shape of the box drawn around plots. The shape resembles the corresponding upper case letter. | *"o", "l", "7", "c", "u", "]"; "n" means no box. |
| cex | no | Character expansion factor for plotting symbols | Numeric value, *1 |
| cex.axis | no | Character expansion factor for axis annotation | Numeric value, *1 |
| cex.lab | no | Character expansion factor for axis labels | Numeric value, *1 |
| cex.main | no | Character expansion factor for main title | Numeric value, *1 |
| cex.sub | no | Character expansion factor for subtitle | Numeric value, *1 |
| RO cin | no | Character size (width, height) in inches | Numeric vector of length 2 |
| col | no | Color for plotting symbols | Color value; *"black" |
| col.axis | no | Color for axes | Color value; *"black" |
| col.lab | no | Color for labels | Color value; *"black" |
| col.main | no | Color for main title | Color value; *"black" |
| col.sub | no | Color for subtitle | Color value; *"black" |
| RO cra | no | Character size (width, height) in pixels | Numeric vector of length 2 |
| family | no | Font family for drawing text | String representing font family; *"" (use device default font) |
| fg | no | Foreground color for plot. | Sets default color for labels and boxes |
| fig | yes | Coordinates of the figure region in the display region of the device | Numeric vector form c(x1, x2, y1, y2) |
| fin | yes | Figure region dimensions in inches | Numeric vector of form c(width, height) |
| font | no | Font to use for plotting symbols and axes | *1=plain, 2=bold, 3=italic, 4=bold italic |
| font.axis | no | Font to use for axes | *1=plain, 2=bold, 3=italic, 4=bold italic |
| font.lab | no | Font to use for labels | *1=plain, 2=bold, 3=italic, 4=bold italic |
| font.main | no | Font to use for subtitle | *1=plain, 2=bold, 3=italic, 4=bold italic |
| font.sub | no | Font to use for plotting symbols and labels | *1=plain, 2=bold, 3=italic, 4=bold italic |
| lab | no | Approximate number of tick marks | c(x, y, len), where x and y are approximate number of tick marks and len is label length; *c(5, 5, 7). len is unimplemented in R. |
| las | no | Orientation of text in axes | *1=parallel to axes, 2=horizontal, 3=perpendicular to axes, 4=vertical |
| lend | no | End style of lines | *0 or "round", 1 or "butt", 2 or "square" |
| lheight | yes | Line height of text. Used to vertically space text. Computed as crt*cex. | Numeric value; *1 |
| ljoin | no | Join style of lines | *0 or "round", 1 or "mitre", 2 or "bevel" |
| lty | no | Line type | 0=blank, *1=solid, 2=dashed, 3=dotted, 4=dotdash, 5=longdash, 6=twodash |
| lwd | no | Line width | Positive number determining line width, *1 |
| mai | yes | Margin width around figure in inches | Numeric vector of form c(bottom, top, left, right) |
| main | no | Main title of the plot. | Character vector, usually of length 1 |
| mar | yes | Margin width around figure in lines | Numeric vector of form c(bottom, top, left, right), *c(5, 4, 4, 2) + 0.1 |
| mex | yes | Character size expansion factor used to describe coordinates in margins of plots | Numeric value, *1 |
| mfcol | yes | Specifies that subsequent figures will be positioned in an nc × nr array in column major order. | Numeric vector: c(nc, nr) |
| mfrow | yes | Specifies that subsequent figures will be positioned in an nc × nr array in row major order. | Numeric vector: c(nc, nr) |
| mgp | no | Margins for axis labels (lab), axis numbers (num), and axis lines (lin) | Numeric vector of form c(lab, num, lin) |
| new | yes | Determines whether to clear frame before drawing as if on a new frame. | *FALSE, TRUE |
| oma | yes | Size of outer margins as a fraction of device region | Numeric vector of form c(bottom, left, top, right) |
| om1 | yes | Size of outer margins in inches | Numeric vector of form c(bottom, left, top, right) |
| pch | no | Plotting character | Integer 1, ... ,20 specifying symbol or character, *1 |
| pin | yes | Plot region in inches | Numeric value |
| plt | yes | Coordinates of the plot region as fractions of the current figure region | Numeric vector of form c(x1, x2, y1, y2) |
| ps | yes | Point size of text (but not symbols). Does not change the relationship between mar and mai (nor oma and omi). | Integer value; default is device specific |
| pty | yes | Type of plot region | "s"=square region, *"m"=maximal region |
| srt | no | String rotation in degrees. Only supported by text function. | Numeric value, *0 |
| sub | no | Subtitle at the bottom of the graph | Character vector, usually of length 1 |
| tck | no | Length of tick marks as a fraction of the smaller of the width or height of plotting region | Numeric value, *NA, 1=draw grid lines |
| tcl | no | Length of tick marks as a fraction of the height of a line of text. | Numeric value, *-0.5, -0.1=NA sets tck to the S default -0.01 |
| type | no | Type of plot | "p"*: points, "l": lines,
"b": both, "o": overlay, "h": high density, "n": no plot |
| usr | no | Extremes of user coordinates of plotting region. | Numeric vector of form c(x1, x2, y1, y2) |
| xaxp | no | Coordinates of extreme tick marks and number of intervals between tick marks when par("xlog") is FALSE. | Numeric vector c(x1, x2, n) |
| xaxs | no | Style of axis interval calculation use for x-axis | *"r"=regular, "i"=internal |
| xaxt | no | x axis type | "s"=standard, "n"=do not plot axis |
| xlab | no | x axis label | Character vector, usually of length 1 |
| xlim | no | x axis limit | Numeric vector of length 2 |
| xlog | yes | Specifies whether to use logarithmic scale on x axis | *FALSE, TRUE |
| yaxp | no | Similar to xaxp | |
| yaxs | no | Similar to xaxs | |
| yaxt | no | Similar to xaxt | |
| ylab | no | y axis label | Character vector, usually of length 1 |
| ylbias | yes | Value used to position text in margins by axis and mtext functions | Numeric value, *0.2 for R devices |
| ylim | no | y axis limit | Numeric vector of length 2 |
| ylog | no | Similar to xlog |