Nothing
see.normcdf.tck <- function ()
{
if (!exists("slider.env"))
slider.env <- NULL
suppressWarnings(rm(slider.env))
slider.env <<- new.env()
mu <- 0
assign("mu", tclVar(mu), envir = slider.env)
sigma <- 1
assign("sigma", tclVar(sigma), envir = slider.env)
xmin <- -5
assign("xmin", tclVar(xmin), envir = slider.env)
xmax <- 5
assign("xmax", tclVar(xmax), envir = slider.env)
ymin <- 0
assign("ymin", tclVar(ymin), envir = slider.env)
ymax <- round(dnorm(0, 0, 0.5), 2)
assign("ymax", tclVar(ymax), envir = slider.env)
# old.par <- par(no.readonly = TRUE)
dev.new(height = 4, width = 8)
par(mar = c(4.4, 4.5, 1, 0.5), cex = 0.85, oma = c(0, 0,
1.5, 0))
layout(matrix(c(1, 2), 1, 2, byrow = TRUE))
norm.refresh <- function(...) {
dev.hold()
mu <- as.numeric(evalq(tclvalue(mu), envir = slider.env))
sigma <- as.numeric(evalq(tclvalue(sigma), envir = slider.env))
xmin <- as.numeric(evalq(tclvalue(xmin), envir = slider.env))
xmax <- as.numeric(evalq(tclvalue(xmax), envir = slider.env))
ymin <- as.numeric(evalq(tclvalue(ymin), envir = slider.env))
ymax <- as.numeric(evalq(tclvalue(ymax), envir = slider.env))
xx <- seq(xmin, xmax, length = 500)
yy <- dnorm(xx, mu, sigma)
y1 <- pnorm(xx, mu, sigma)
plot(xx, yy, type = "l", xlim = c(xmin, xmax), ylim = c(ymin,
ymax), xlab = expression(italic(x)), ylab = expression(paste(italic(f),
"(", italic(x), ")", sep = "")))
lines(c(mu, mu), c(par("usr")[3], dnorm(0, 0, sigma)),
lty = 3)
segments(mu, dnorm(sigma, 0, sigma),mu + sigma, dnorm(sigma, 0, sigma), lty = 2)
legend("topright", lty = c(3, 2),
legend = c(expression(mu), expression(paste("+1",
sigma))), bty = "n")
plot(xx, y1, type = "l", xlim = c(xmin, xmax), xlab = expression(italic(x)),
ylab = expression(paste(italic(F), "(", italic(x),
")", sep = "")))
mtext(bquote(paste(italic(X), " ~ ", italic(N), "(",
.(mu), ", ", .(sigma^2), ")", sep = "")), outer = TRUE,
side = 3, cex = 0.9)
dev.flush()
}
tclServiceMode(TRUE)
m <- tktoplevel()
tkwm.title(m, "N(\u03bc, \u03c3\u00B2)")
tkpack(tklabel(m, text = " Visualizing the Normal Distribution "))
tkwm.geometry(m, "+0+0")
tkpack(fr <- tkframe(m), side = "top")
tkpack(tklabel(fr, text = "\u03BC", font = c("Helvetica", "9",
"italic"), width = "20"), side = "right")
tkpack(sc <- tkscale(fr, command = norm.refresh, from = -3,
to = 3, orient = "horiz", resolution = 0.1, showvalue = TRUE),
side = "left")
assign("sc", sc, envir = slider.env)
evalq(tkconfigure(sc, variable = mu), envir = slider.env)
tkpack(fr <- tkframe(m), side = "top")
tkpack(tklabel(fr, text = "\u03c3", font = c("Helvetica", "9",
"italic"), width = "20"), side = "right")
tkpack(sc <- tkscale(fr, command = norm.refresh, from = 0.5,
to = 3, orient = "horiz", resolution = 0.1, showvalue = TRUE),
side = "left")
assign("sc", sc, envir = slider.env)
evalq(tkconfigure(sc, variable = sigma), envir = slider.env)
tkpack(fr <- tkframe(m), side = "top")
tkpack(tklabel(fr, text = "Xmin:", width = 6), side = "left")
tkpack(e <- tkentry(fr, width = 8), side = "left")
assign("e", e, envir = slider.env)
evalq(tkconfigure(e, textvariable = xmin), envir = slider.env)
tkpack(tklabel(fr, text = "Xmax:", width = 6), side = "left")
tkpack(e <- tkentry(fr, width = 8), side = "left")
assign("e", e, envir = slider.env)
evalq(tkconfigure(e, textvariable = xmax), envir = slider.env)
tkpack(fr <- tkframe(m), side = "top")
tkpack(tklabel(fr, text = "Ymin:", width = 6), side = "left")
tkpack(e <- tkentry(fr, width = 8), side = "left")
assign("e", e, envir = slider.env)
evalq(tkconfigure(e, textvariable = ymin), envir = slider.env)
tkpack(tklabel(fr, text = "Ymax:", width = 6), side = "left")
tkpack(e <- tkentry(fr, width = 8), side = "left")
assign("e", e, envir = slider.env)
evalq(tkconfigure(e, textvariable = ymax), envir = slider.env)
tkpack(tkbutton(m, text = "Refresh", command = norm.refresh),
side = "left")
tkpack(tkbutton(m, text = "Exit", command = function() tkdestroy(m)),
side = "right")
# on.exit(par(old.par))
}
see.norm.tck<-function ()
{
if (!exists("slider.env"))
slider.env <- NULL; suppressWarnings(rm(slider.env)); slider.env <<- new.env()# Dummy to trick R CMD check
mu <- 0
assign("mu", tclVar(mu),envir= slider.env)
sigma <- 1
assign("sigma", tclVar(sigma),envir= slider.env)
xmin <- -5
assign("xmin", tclVar(xmin),envir= slider.env)
xmax <- 5
assign("xmax", tclVar(xmax),envir= slider.env)
ymin <- 0
assign("ymin", tclVar(ymin),envir= slider.env)
ymax <- round(dnorm(0, 0, 0.5), 2)
assign("ymax", tclVar(ymax),envir= slider.env)
norm.refresh <- function(...) {
dev.hold()
mu <- as.numeric(evalq(tclvalue(mu),envir= slider.env))
sigma <- as.numeric(evalq(tclvalue(sigma),envir= slider.env))
xmin <- as.numeric(evalq(tclvalue(xmin),envir= slider.env))
xmax <- as.numeric(evalq(tclvalue(xmax),envir= slider.env))
ymin <- as.numeric(evalq(tclvalue(ymin),envir= slider.env))
ymax <- as.numeric(evalq(tclvalue(ymax),envir= slider.env))
xx <- seq(xmin, xmax, length = 500)
yy <- dnorm(xx, mu, sigma)
plot(xx, yy, type = "l", xlim = c(xmin, xmax), ylim = c(ymin,
ymax), xlab = expression(italic(x)), ylab = expression(paste(italic(f),
"(", italic(x), ")", sep = "")))
lines(c(mu, mu), c(par("usr")[3], dnorm(0, 0, sigma)),
lty = 3)
segments(mu, dnorm(sigma, 0, sigma),mu + sigma, dnorm(sigma, 0, sigma), lty = 2)
mtext(bquote(paste(italic(X), " ~ ", italic(N), "(", .(mu), ", ", .(sigma^2),")", sep = "")), line = 1, side = 3)
legend("topright", lty = c(3, 2),
legend = c(expression(mu), expression(paste("+1",
sigma))), bty = "n")
dev.flush()
}
tclServiceMode(TRUE)
m <- tktoplevel()
tkwm.title(m, "N(\u03bc, \u03c3\u00B2)")
tkpack(tklabel(m,text=" Visualizing the Normal Distribution "))
tkwm.geometry(m, "+0+0")
tkpack(fr <- tkframe(m), side = "top")
tkpack(tklabel(fr, text = '\u03bc',font=c("Helvetica","9","italic"), width = "20"), side = "right")
tkpack(sc <- tkscale(fr, command = norm.refresh, from = -3,
to = 3, orient = "horiz", resolution = 0.1, showvalue = TRUE),
side = "left")
assign("sc", sc,envir= slider.env)
evalq(tkconfigure(sc, variable = mu),envir= slider.env)
tkpack(fr <- tkframe(m), side = "top")
tkpack(tklabel(fr, text = '\u03c3',font=c("Helvetica","9","italic"), width = "20"),
side = "right")
tkpack(sc <- tkscale(fr, command = norm.refresh, from = 0.5,
to = 3, orient = "horiz", resolution = 0.1, showvalue = TRUE),
side = "left")
assign("sc", sc,envir= slider.env)
evalq(tkconfigure(sc, variable = sigma),envir= slider.env)
tkpack(fr <- tkframe(m), side = "top")
tkpack(tklabel(fr, text = "Xmin:", width = 6), side = "left")
tkpack(e <- tkentry(fr, width = 8), side = "left")
assign("e", e,envir= slider.env)
evalq(tkconfigure(e, textvariable = xmin),envir= slider.env)
tkpack(tklabel(fr, text = "Xmax:", width = 6), side = "left")
tkpack(e <- tkentry(fr, width = 8), side = "left")
assign("e", e,envir= slider.env)
evalq(tkconfigure(e, textvariable = xmax),envir= slider.env)
tkpack(fr <- tkframe(m), side = "top")
tkpack(tklabel(fr, text = "Ymin:", width = 6), side = "left")
tkpack(e <- tkentry(fr, width = 8), side = "left")
assign("e", e,envir= slider.env)
evalq(tkconfigure(e, textvariable = ymin),envir= slider.env)
tkpack(tklabel(fr, text = "Ymax:", width = 6), side = "left")
tkpack(e <- tkentry(fr, width = 8), side = "left")
assign("e", e,envir= slider.env)
evalq(tkconfigure(e, textvariable = ymax),envir= slider.env)
tkpack(tkbutton(m, text = "Refresh", command = norm.refresh),
side = "left")
tkpack(tkbutton(m, text = "Exit", command = function() tkdestroy(m)),
side = "right")
}
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