family graphical parameter (see par)
has been set to one of the Hershey fonts (see ‘Details’)
Hershey vector fonts are used to render text. When using the text and contour functions
Hershey fonts may be selected via the vfont argument, which is
a character vector of length 2 (see ‘Details’ for valid
values). This allows Cyrillic to be selected, which is not available
via the font families.
Hershey Drawback:
You cannot use mathematical expressions (plotmath) with
Hershey fonts.
The Hershey characters are organised into a set of fonts. A
particular font is selected by specifying one of the following
font families via par(family) and specifying the desired font
face (plain, bold, italic, bold-italic) via par(font).
| family |
| faces available |
"HersheySerif" |
| plain, bold, italic, bold-italic |
"HersheySans" |
| plain, bold, italic, bold-italic |
"HersheyScript" |
| plain, bold |
"HersheyGothicEnglish" |
| plain |
"HersheyGothicGerman" |
| plain |
"HersheyGothicItalian" |
| plain |
"HersheySymbol" |
| plain, bold, italic, bold-italic |
"HersheySansSymbol" |
| plain, italic |
In the vfont specification for the text and
contour functions, the Hershey font is specified by a typeface
(e.g., serif or sans serif) and a fontindex or
‘style’ (e.g., plain or italic). The first
element of vfont specifies the typeface and the second element
specifies the fontindex. The first table produced by
demo(Hershey) shows the character a produced by each of
the different fonts.
The available typeface and fontindex values are
available as list components of the variable Hershey.
The allowed pairs for (typeface, fontindex) are:
| serif |
| plain |
| serif |
| italic |
| serif |
| bold |
| serif |
| bold italic |
| serif |
| cyrillic |
| serif |
| oblique cyrillic |
| serif |
| EUC |
| sans serif |
| plain |
| sans serif |
| italic |
| sans serif |
| bold |
| sans serif |
| bold italic |
| script |
| plain |
| script |
| italic |
| script |
| bold |
| gothic english |
| plain |
| gothic german |
| plain |
| gothic italian |
| plain |
| serif symbol |
| plain |
| serif symbol |
| italic |
| serif symbol |
| bold |
| serif symbol |
| bold italic |
| sans serif symbol |
| plain |
| sans serif symbol |
| italic |
Hershey$allowed.
One useful escape sequence (in the current context) is of the
form: \123. The three digits following the \
specify an octal code for a character. For example, the octal
code for p is 160 so the strings "p" and
"\160" are equivalent. This is useful for producing
characters when there is not an appropriate key on your keyboard.
The other useful escape sequences all begin with \\. These are described below. Remember that backslashes have to be doubled in R character strings, so they need to be entered with four backslashes.
demo(Hershey)
shows all of the symbol escape sequences and the symbols that they
produce.
demo(Hershey) shows all of the ISO
Latin-1 escape sequences.These characters can be used directly. (Characters not in Latin-1 are replaced by a dot.)
Several characters are missing, c-cedilla has no cedilla and
‘sharp s’ (U+00DF, also known as ‘esszett’)
is rendered as ss.
demo(Hershey) shows all of the
special character escape sequences.
demo(Hershey) shows the
octal codes for the available Cyrillic characters. Cyrillic has to be selected via a ("serif", fontindex) pair
rather than via a font family.
When using the Serif typeface and EUC fontindex, these characters can be produced by a pair of octal codes. Given the hexadecimal code (e.g., 0x2421), take the first two digits and add 0x80 and do the same to the second two digits (e.g., 0x21 and 0x24 become 0xa4 and 0xa1), then convert both to octal (e.g., 0xa4 and 0xa1 become 244 and 241). For example, the first Hiragana character is produced by \244\241.
It is also possible to use the hexadecimal code directly. This works for all non-EUC fonts by specifying an escape sequence of the form \\#J1234. For example, the first Hiragana character is produced by \\#J2421.
The Kanji characters may be specified in a third way, using the so-called "Nelson Index", by specifying an escape sequence of the form \\#N1234. For example, the (obsolete) Kanji for ‘one’ is produced by \\#N0001.
demo(Japanese) shows the available Japanese characters.
demo(Hershey) shows all of
the available raw glyphs.
demo(Hershey), par,
text, contour. Japanese for the Japanese characters in the Hershey fonts.
Hershey
## for tables of examples, see demo(Hershey)
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