Symbols in R

## --- Hershey Vector Fonts

######
# create tables of vector font functionality
######
make.table <- function(nr, nc) {
    savepar <- par(mar=rep(0, 4), pty="s")
    plot(c(0, nc*2 + 1), c(0, -(nr + 1)),
         type="n", xlab="", ylab="", axes=FALSE)
    savepar
}

get.r <- function(i, nr)     i %% nr + 1
get.c <- function(i, nr)     i %/% nr + 1

draw.title <- function(title, i = 0, nr, nc) {
    r <- get.r(i, nr)
    c <- get.c(i, nr)
    text((nc*2 + 1)/2, 0, title, font=2)
}

draw.sample.cell <- function(typeface, fontindex, string, i, nr) {
    r <- get.r(i, nr)
    c <- get.c(i, nr)
    text(2*(c - 1) + 1, -r, paste(typeface, fontindex))
    text(2*c, -r, string, vfont=c(typeface, fontindex), cex=1.5)
    rect(2*(c - 1) + .5, -(r - .5), 2*c + .5, -(r + .5), border="grey")
}

draw.vf.cell <- function(typeface, fontindex, string, i, nr, raw.string=NULL) {
    r <- get.r(i, nr)
    c <- get.c(i, nr)
    if (is.null(raw.string))
        raw.string <- paste("\\", string, sep="")
    text(2*(c - 1) + 1, -r, raw.string, col="grey")
    text(2*c, -r, string, vfont=c(typeface, fontindex))
    rect(2*(c - 1) + .5, -(r - .5), (2*c + .5), -(r + .5), border="grey")
}
nr <- 25
nc <- 6
tf <- "serif"
fi <- "plain"
make.table(nr, nc)
i <- 0
draw.title("Symbol (incl. Greek) Escape Sequences", i, nr, nc)
## Greek alphabet in order
draw.vf.cell(tf, fi, "\\*A", i, nr); i<-i+1; { "Alpha"}
draw.vf.cell(tf, fi, "\\*B", i, nr); i<-i+1; { "Beta"}
draw.vf.cell(tf, fi, "\\*G", i, nr); i<-i+1; { "Gamma"}
draw.vf.cell(tf, fi, "\\*D", i, nr); i<-i+1; { "Delta"}
draw.vf.cell(tf, fi, "\\*E", i, nr); i<-i+1; { "Epsilon"}
draw.vf.cell(tf, fi, "\\*Z", i, nr); i<-i+1; { "Zeta"}
draw.vf.cell(tf, fi, "\\*Y", i, nr); i<-i+1; { "Eta"}
draw.vf.cell(tf, fi, "\\*H", i, nr); i<-i+1; { "Theta"}
draw.vf.cell(tf, fi, "\\*I", i, nr); i<-i+1; { "Iota"}
draw.vf.cell(tf, fi, "\\*K", i, nr); i<-i+1; { "Kappa"}
draw.vf.cell(tf, fi, "\\*L", i, nr); i<-i+1; { "Lambda"}
draw.vf.cell(tf, fi, "\\*M", i, nr); i<-i+1; { "Mu"}
draw.vf.cell(tf, fi, "\\*N", i, nr); i<-i+1; { "Nu"}
draw.vf.cell(tf, fi, "\\*C", i, nr); i<-i+1; { "Xi"}
draw.vf.cell(tf, fi, "\\*O", i, nr); i<-i+1; { "Omicron"}
draw.vf.cell(tf, fi, "\\*P", i, nr); i<-i+1; { "Pi"}
draw.vf.cell(tf, fi, "\\*R", i, nr); i<-i+1; { "Rho"}
draw.vf.cell(tf, fi, "\\*S", i, nr); i<-i+1; { "Sigma"}
draw.vf.cell(tf, fi, "\\*T", i, nr); i<-i+1; { "Tau"}
draw.vf.cell(tf, fi, "\\*U", i, nr); i<-i+1; { "Upsilon"}
draw.vf.cell(tf, fi, "\\+U", i, nr); i<-i+1; { "Upsilon1"}
draw.vf.cell(tf, fi, "\\*F", i, nr); i<-i+1; { "Phi"}
draw.vf.cell(tf, fi, "\\*X", i, nr); i<-i+1; { "Chi"}
draw.vf.cell(tf, fi, "\\*Q", i, nr); i<-i+1; { "Psi"}
draw.vf.cell(tf, fi, "\\*W", i, nr); i<-i+1; { "Omega"}
#
draw.vf.cell(tf, fi, "\\*a", i, nr); i<-i+1; { "alpha"}
draw.vf.cell(tf, fi, "\\*b", i, nr); i<-i+1; { "beta"}
draw.vf.cell(tf, fi, "\\*g", i, nr); i<-i+1; { "gamma"}
draw.vf.cell(tf, fi, "\\*d", i, nr); i<-i+1; { "delta"}
draw.vf.cell(tf, fi, "\\*e", i, nr); i<-i+1; { "epsilon"}
draw.vf.cell(tf, fi, "\\*z", i, nr); i<-i+1; { "zeta"}
draw.vf.cell(tf, fi, "\\*y", i, nr); i<-i+1; { "eta"}
draw.vf.cell(tf, fi, "\\*h", i, nr); i<-i+1; { "theta"}
draw.vf.cell(tf, fi, "\\+h", i, nr); i<-i+1; { "theta1"}
draw.vf.cell(tf, fi, "\\*i", i, nr); i<-i+1; { "iota"}
draw.vf.cell(tf, fi, "\\*k", i, nr); i<-i+1; { "kappa"}
draw.vf.cell(tf, fi, "\\*l", i, nr); i<-i+1; { "lambda"}
draw.vf.cell(tf, fi, "\\*m", i, nr); i<-i+1; { "mu"}
draw.vf.cell(tf, fi, "\\*n", i, nr); i<-i+1; { "nu"}
draw.vf.cell(tf, fi, "\\*c", i, nr); i<-i+1; { "xi"}
draw.vf.cell(tf, fi, "\\*o", i, nr); i<-i+1; { "omicron"}
draw.vf.cell(tf, fi, "\\*p", i, nr); i<-i+1; { "pi"}
draw.vf.cell(tf, fi, "\\*r", i, nr); i<-i+1; { "rho"}
draw.vf.cell(tf, fi, "\\*s", i, nr); i<-i+1; { "sigma"}
draw.vf.cell(tf, fi, "\\ts", i, nr); i<-i+1; { "sigma1"}
draw.vf.cell(tf, fi, "\\*t", i, nr); i<-i+1; { "tau"}
draw.vf.cell(tf, fi, "\\*u", i, nr); i<-i+1; { "upsilon"}
draw.vf.cell(tf, fi, "\\*f", i, nr); i<-i+1; { "phi"}
draw.vf.cell(tf, fi, "\\+f", i, nr); i<-i+1; { "phi1"}
draw.vf.cell(tf, fi, "\\*x", i, nr); i<-i+1; { "chi"}
draw.vf.cell(tf, fi, "\\*q", i, nr); i<-i+1; { "psi"}
draw.vf.cell(tf, fi, "\\*w", i, nr); i<-i+1; { "omega"}
draw.vf.cell(tf, fi, "\\+p", i, nr); i<-i+1; { "omega1"}
#
draw.vf.cell(tf, fi, "\\fa", i, nr); i<-i+1; { "universal"}
draw.vf.cell(tf, fi, "\\te", i, nr); i<-i+1; { "existential"}
draw.vf.cell(tf, fi, "\\st", i, nr); i<-i+1; { "suchthat"}
draw.vf.cell(tf, fi, "\\**", i, nr); i<-i+1; { "asteriskmath"}
draw.vf.cell(tf, fi, "\\=~", i, nr); i<-i+1; { "congruent"}
draw.vf.cell(tf, fi, "\\tf", i, nr); i<-i+1; { "therefore"}
draw.vf.cell(tf, fi, "\\pp", i, nr); i<-i+1; { "perpendicular"}
draw.vf.cell(tf, fi, "\\ul", i, nr); i<-i+1; { "underline"}
draw.vf.cell(tf, fi, "\\rx", i, nr); i<-i+1; { "radicalex"}

draw.vf.cell(tf, fi, "\\ap", i, nr); i<-i+1; { "similar"}
draw.vf.cell(tf, fi, "\\fm", i, nr); i<-i+1; { "minute"}
draw.vf.cell(tf, fi, "\\<=", i, nr); i<-i+1; { "lessequal"}
draw.vf.cell(tf, fi, "\\f/", i, nr); i<-i+1; { "fraction"}
draw.vf.cell(tf, fi, "\\if", i, nr); i<-i+1; { "infinity"}
draw.vf.cell(tf, fi, "\\Fn", i, nr); i<-i+1; { "florin"}
draw.vf.cell(tf, fi, "\\CL", i, nr); i<-i+1; { "club"}
draw.vf.cell(tf, fi, "\\DI", i, nr); i<-i+1; { "diamond"}
draw.vf.cell(tf, fi, "\\HE", i, nr); i<-i+1; { "heart"}
draw.vf.cell(tf, fi, "\\SP", i, nr); i<-i+1; { "spade"}
draw.vf.cell(tf, fi, "\\<>", i, nr); i<-i+1; { "arrowboth"}
draw.vf.cell(tf, fi, "\\<-", i, nr); i<-i+1; { "arrowleft"}
draw.vf.cell(tf, fi, "\\ua", i, nr); i<-i+1; { "arrowup"}
draw.vf.cell(tf, fi, "\\->", i, nr); i<-i+1; { "arrowright"}
draw.vf.cell(tf, fi, "\\da", i, nr); i<-i+1; { "arrowdown"}
draw.vf.cell(tf, fi, "\\de", i, nr); i<-i+1; { "degree"}
draw.vf.cell(tf, fi, "\\+-", i, nr); i<-i+1; { "plusminus"}
draw.vf.cell(tf, fi, "\\sd", i, nr); i<-i+1; { "second"}
draw.vf.cell(tf, fi, "\\>=", i, nr); i<-i+1; { "greaterequal"}
draw.vf.cell(tf, fi, "\\mu", i, nr); i<-i+1; { "multiply"}
draw.vf.cell(tf, fi, "\\pt", i, nr); i<-i+1; { "proportional"}
draw.vf.cell(tf, fi, "\\pd", i, nr); i<-i+1; { "partialdiff"}
draw.vf.cell(tf, fi, "\\bu", i, nr); i<-i+1; { "bullet"}
draw.vf.cell(tf, fi, "\\di", i, nr); i<-i+1; { "divide"}
draw.vf.cell(tf, fi, "\\!=", i, nr); i<-i+1; { "notequal"}
draw.vf.cell(tf, fi, "\\==", i, nr); i<-i+1; { "equivalence"}
draw.vf.cell(tf, fi, "\\~~", i, nr); i<-i+1; { "approxequal"}
draw.vf.cell(tf, fi, "\\..", i, nr); i<-i+1; { "ellipsis"}
draw.vf.cell(tf, fi, "\\an", i, nr); i<-i+1; { "arrowhorizex"}
draw.vf.cell(tf, fi, "\\CR", i, nr); i<-i+1; { "carriagereturn"}
draw.vf.cell(tf, fi, "\\Ah", i, nr); i<-i+1; { "aleph"}
draw.vf.cell(tf, fi, "\\Im", i, nr); i<-i+1; { "Ifraktur"}
draw.vf.cell(tf, fi, "\\Re", i, nr); i<-i+1; { "Rfraktur"}
draw.vf.cell(tf, fi, "\\wp", i, nr); i<-i+1; { "weierstrass"}
draw.vf.cell(tf, fi, "\\c*", i, nr); i<-i+1; { "circlemultiply"}
draw.vf.cell(tf, fi, "\\c+", i, nr); i<-i+1; { "circleplus"}
draw.vf.cell(tf, fi, "\\es", i, nr); i<-i+1; { "emptyset"}
draw.vf.cell(tf, fi, "\\ca", i, nr); i<-i+1; { "cap"}
draw.vf.cell(tf, fi, "\\cu", i, nr); i<-i+1; { "cup"}
draw.vf.cell(tf, fi, "\\SS", i, nr); i<-i+1; { "superset"}
draw.vf.cell(tf, fi, "\\ip", i, nr); i<-i+1; { "reflexsuperset"}
draw.vf.cell(tf, fi, "\\n<", i, nr); i<-i+1; { "notsubset"}
draw.vf.cell(tf, fi, "\\SB", i, nr); i<-i+1; { "subset"}
draw.vf.cell(tf, fi, "\\ib", i, nr); i<-i+1; { "reflexsubset"}
draw.vf.cell(tf, fi, "\\mo", i, nr); i<-i+1; { "element"}
draw.vf.cell(tf, fi, "\\nm", i, nr); i<-i+1; { "notelement"}
draw.vf.cell(tf, fi, "\\/_", i, nr); i<-i+1; { "angle"}
draw.vf.cell(tf, fi, "\\gr", i, nr); i<-i+1; { "nabla"}
draw.vf.cell(tf, fi, "\\rg", i, nr); i<-i+1; { "registerserif"}
draw.vf.cell(tf, fi, "\\co", i, nr); i<-i+1; { "copyrightserif"}
draw.vf.cell(tf, fi, "\\tm", i, nr); i<-i+1; { "trademarkserif"}
draw.vf.cell(tf, fi, "\\PR", i, nr); i<-i+1; { "product"}
draw.vf.cell(tf, fi, "\\sr", i, nr); i<-i+1; { "radical"}
draw.vf.cell(tf, fi, "\\md", i, nr); i<-i+1; { "dotmath"}
draw.vf.cell(tf, fi, "\\no", i, nr); i<-i+1; { "logicalnot"}
draw.vf.cell(tf, fi, "\\AN", i, nr); i<-i+1; { "logicaland"}
draw.vf.cell(tf, fi, "\\OR", i, nr); i<-i+1; { "logicalor"}
draw.vf.cell(tf, fi, "\\hA", i, nr); i<-i+1; { "arrowdblboth"}
draw.vf.cell(tf, fi, "\\lA", i, nr); i<-i+1; { "arrowdblleft"}
draw.vf.cell(tf, fi, "\\uA", i, nr); i<-i+1; { "arrowdblup"}
draw.vf.cell(tf, fi, "\\rA", i, nr); i<-i+1; { "arrowdblright"}
draw.vf.cell(tf, fi, "\\dA", i, nr); i<-i+1; { "arrowdbldown"}
draw.vf.cell(tf, fi, "\\lz", i, nr); i<-i+1; { "lozenge"}
draw.vf.cell(tf, fi, "\\la", i, nr); i<-i+1; { "angleleft"}
draw.vf.cell(tf, fi, "\\RG", i, nr); i<-i+1; { "registersans"}
draw.vf.cell(tf, fi, "\\CO", i, nr); i<-i+1; { "copyrightsans"}
draw.vf.cell(tf, fi, "\\TM", i, nr); i<-i+1; { "trademarksans"}
draw.vf.cell(tf, fi, "\\SU", i, nr); i<-i+1; { "summation"}
draw.vf.cell(tf, fi, "\\lc", i, nr); i<-i+1; { "bracketlefttp"}
draw.vf.cell(tf, fi, "\\lf", i, nr); i<-i+1; { "bracketleftbt"}
draw.vf.cell(tf, fi, "\\ra", i, nr); i<-i+1; { "angleright"}
draw.vf.cell(tf, fi, "\\is", i, nr); i<-i+1; { "integral"}
draw.vf.cell(tf, fi, "\\rc", i, nr); i<-i+1; { "bracketrighttp"}
draw.vf.cell(tf, fi, "\\rf", i, nr); i<-i+1; { "bracketrightbt"}
draw.vf.cell(tf, fi, "\\~=", i, nr); i<-i+1; { "congruent"}
draw.vf.cell(tf, fi, "\\pr", i, nr); i<-i+1; { "minute"}
draw.vf.cell(tf, fi, "\\in", i, nr); i<-i+1; { "infinity"}
draw.vf.cell(tf, fi, "\\n=", i, nr); i<-i+1; { "notequal"}
draw.vf.cell(tf, fi, "\\dl", i, nr); i<-i+1; { "nabla"}