screenPage: Page Setup for Plots
In tis: Time Indexes and Time Indexed Series

Description Usage Arguments Details Value See Also Examples

Places header and footer text items in outer margin of page and splits the screen appropriately. Can also redraw header and footer.

screenPage(head = NULL, sub = NULL, foot = NULL,
           date = FALSE, dateFormat = "%x", time = FALSE,
           topLeft = character(0), topRight = character(0),
           headFont = par("font.main"), subFont = par("font.sub"),
           footFont = par("font"),
           cex = 1.001, headCex = 1.5, subCex = 0.85,
           footCex = 0.75, topLeftCex = 0.85, topRightCex = 0.85,
           footAlign = 0,
           leftMargin = 0, rightMargin = leftMargin,
           topMargin = 0, bottomMargin = topMargin)

`head`	character string or strings to appear centered in the top outer margin of the page. If `length(head) > 1`, a multi-line main title results.
`sub`	character string or strings to appear centered just under `head`.
`foot`	character string or strings to appear in the bottom outer margin of the page.
`date`	logical: if `TRUE`, put the current date in the upper right corner of the page.
`dateFormat`	`strptime`-style format to use if `date` is `TRUE`. The default formats dates like 11/30/2006. What is actually being formatted is the value returned by `Sys.time()`, so you can also use time formats here. For example, setting `dateFormat = "%c"` will create a string like "Thu 30 Nov 2006 02:49:45 PM EST".
`time`	logical: if `TRUE`, put the current time in the upper right corner of the page. If `date` is also true, the time string will be on the line below the date string.
`topLeft`	character string or strings to appear at top left corner of the page
`topRight`	character string or strings to appear at top right corner of the page
`headFont`	font to use in writing the main title in `head`. The default uses whatever par("font.main") is set to.
`subFont`	font to use in writing the sub title in `sub`. The default uses whatever par("font.sub") is set to.
`footFont`	font to use in writing the footnotes in `foot`. The default uses whatever par("font") is set to.
`cex`	number by which all of the other "cex" arguments are scaled.
`headCex`	number: Character Expansion Factor (cex) for the string(s) in `head`. The actual cex used will be `cex * headCex`.
`subCex`	number: cex for the string(s) in `sub`. The actual cex used will be `cex * subCex`.
`footCex`	number: cex for the string(s) in `foot`. The actual cex used will be `cex * footCex`.
`topLeftCex`	number: cex for the string(s) appearing in the top left corner of the page. The actual cex used for these strings will be `cex * topLeftCex`.
`topRightCex`	number: cex for the string(s) appearing in the top right corner of the page, including the time and date stamps. The actual cex used for these strings will be `cex * topRightCex`.
`footAlign`	number: justification for the strings in `foot`. `0` means left justify, `1` means right justify, `0.5` means to center the text. Other numbers are a corresponding distance between the extremes.
`leftMargin`	left margin of page in inches.
`rightMargin`	right margin of page in inches. Default is same as `leftMargin`
`topMargin`	top margin of page in inches.
`bottomMargin`	bottom margin of page in inches. Default is same as `topMargin`

screenPage first sets aside space for the margins specified by topMargin, bottomMargin, leftMargin and rightMargin. Then it figures out how much additional space is needed for the top and bottom outer margin text elements, places them, and then splits the screen in 3, with screen 3 being the middle part of the page. The user is then free either to further subdivide screen 3 (using split.screen()) or to use it as is.

On exit, screen 3 is the active screen.

This function returns a list of all of its arguments, including default values for arguments that were not supplied. The return is invisible if a graphics device is active.

split.screen

screenPage(head = "Chart 1", date = TRUE, foot = rep(" ", 4),
           cex = 0.85, headCex = 1)

## then draw charts, possibly after further subdividing the screen