Spaces:
Sleeping
Sleeping
FreddyHernandez
commited on
Commit
•
1ee6670
1
Parent(s):
b8a2bdb
Upload 2 files
Browse files
server.R
ADDED
@@ -0,0 +1,219 @@
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library(shiny)
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shinyServer(function(input, output, session){
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# ----------------------- Shadow function ----------------------
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shadowtext <- function(x, y=NULL, labels, col='white', bg='black',
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theta= seq(0, 2*pi, length.out=50), r=0.1, ... ) {
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xy <- xy.coords(x,y)
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xo <- r*strwidth('A')
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yo <- r*strheight('A')
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# draw background text with small shift in x and y in background colour
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for (i in theta) {
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text( xy$x + cos(i)*xo, xy$y + sin(i)*yo, labels, col=bg, ... )
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}
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# draw actual text in exact xy position in foreground colour
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text(xy$x, xy$y, labels, col=col, ... )
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}
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#--------------------------------------------------------------
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output$miplot <- renderPlot({
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#----------------------------- Normal ---------------------------------
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if(input$Distribucion == "Normal"){
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if(input$Propede == "Percentil"){
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media <- input$Media
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desvi <- input$Sd
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proba <- input$Probabilidad
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percentil <- qnorm(p=proba, mean=media, sd=desvi)
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k <- 5 # numero de desviaciones
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curve(dnorm(x, media, desvi), xlim=media+c(-k,k)*desvi, lwd=3,
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main='Distribución normal', ylab="", xlab="", axes=FALSE)
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axis(1, at=seq(media-k*desvi, media+k*desvi, desvi), pos=0)
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axis(2, las=1)
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secuencia <- seq(media-k*desvi, percentil, length.out=10000)
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cord.x <- c(media-k*desvi, secuencia, percentil)
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cord.y <- c(0, dnorm(secuencia, media, desvi), 0)
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polygon(cord.x, cord.y, col='steelblue')
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shadowtext(x=percentil, y=0, round(percentil, 2), col="chartreuse", cex=2)
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title(sub=bquote(P(X<.(percentil))==.(proba)), cex.sub=2)
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}
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else {
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media <- input$Media
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desvi <- input$Sd
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percentil <- input$Percentil
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proba <- pnorm(percentil, media, desvi)
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k <- 5 # numero de desviaciones
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curve(dnorm(x, media, desvi), xlim=media+c(-k,k)*desvi, lwd=3,
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main='Distribución normal', ylab="", xlab="", axes=FALSE)
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axis(1, at=seq(media-k*desvi, media+k*desvi, desvi), pos=0)
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axis(2, las=1)
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if (percentil > media-k*desvi) {
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secuencia <- seq(media-k*desvi, percentil, length.out=10000)
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cord.x <- c(media-k*desvi, secuencia, percentil)
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cord.y <- c(0, dnorm(secuencia, media, desvi), 0)
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polygon(cord.x, cord.y, col='steelblue')
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altura <- dnorm(percentil, media, desvi)
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shadowtext(x=percentil, y=altura/2, round(proba, 2),
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col="orchid2", cex=2)
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}
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title(sub=bquote(P(X<.(percentil))==.(proba)), cex.sub=2)
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}}
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#----------------------------- t-student ---------------------------------
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if(input$Distribucion == "t-student"){
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if(input$Propede == "Percentil"){
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df=input$grados
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proba <- input$Probabilidad
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percentil <- qt(p=proba, df=df, lower.tail=F)
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curve(dt(x, df), xlim=c(-5,5), lwd=3,
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main='Distribución t-student', ylab="", xlab="",
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axes=FALSE)
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axis(1, at=seq(-5, 5, by=0.5), pos=0)
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axis(2, las=1)
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secuencia <- seq(percentil, 5, length.out=10000)
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cord.x <- c(percentil, secuencia, 5)
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cord.y <- c(0, dt(secuencia, df=df), 0)
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polygon(cord.x, cord.y, col='darkolivegreen3')
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shadowtext(x=percentil, y=0.01, round(percentil, 2),
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col="chartreuse", cex=2)
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title(sub=bquote(P(t>.(percentil))==.(proba)), cex.sub=2)
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output$perce <- renderText(percentil)
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}
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else {
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df=input$grados
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percentil=input$Percentil
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proba <- pt(q=percentil, df=df, lower.tail=F)
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curve(dt(x, df), xlim=c(-5,5), lwd=3,
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main='Distribución t-student', ylab="", xlab="",
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axes=FALSE)
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axis(1, at=seq(-5, 5, by=0.5), pos=0)
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axis(2, las=1)
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secuencia <- seq(percentil, 5, length.out=10000)
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cord.x <- c(percentil, secuencia, 5)
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cord.y <- c(0, dt(secuencia, df=df), 0)
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polygon(cord.x, cord.y, col='darkolivegreen3')
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altura <- dt(x=percentil, df=df)
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shadowtext(x=percentil, y=altura/2, round(proba, 2),
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col="orchid2", cex=2)
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title(sub=bquote(P(t>.(percentil))==.(proba)), cex.sub=2)
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}
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}
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#----------------------------- F ---------------------------------
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if(input$Distribucion == "F"){
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if(input$Propede == "Percentil"){
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proba <- input$Probabilidad
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df1=input$grados1
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df2=input$grados2
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percentil <- qf(p=proba, df1, df2, lower.tail=F)
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max.x <- 3 * percentil
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curve(df(x, df1, df2), xlim=c(0, max.x), lwd=3,
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main='Distribución F', ylab="", xlab="", axes=FALSE)
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axis(1, at=seq(0, max.x, by=0.5), pos=0)
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axis(2, las=1)
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secuencia <- seq(percentil, max.x, length.out=10000)
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cord.x <- c(percentil, secuencia, max.x)
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cord.y <- c(0, df(secuencia, df1, df2), 0)
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polygon(cord.x, cord.y, col='lightsalmon3')
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shadowtext(x=percentil, y=0.01, round(percentil, 2),
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col="chartreuse", cex=2)
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title(sub=bquote(P(F>.(percentil))==.(proba)), cex.sub=2)
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}
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else {
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df1=input$grados1
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df2=input$grados2
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percentil=input$Percentil
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proba <- pf(q=percentil, df1, df2, lower.tail=F)
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max.x <- 3 * percentil
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curve(df(x, df1, df2), xlim=c(0, max.x), lwd=3,
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main='Distribución F', ylab="", xlab="", axes=FALSE)
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axis(1, at=seq(0, max.x, by=0.5), pos=0)
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axis(2, las=1)
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secuencia <- seq(percentil, max.x, length.out=10000)
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cord.x <- c(percentil, secuencia, max.x)
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cord.y <- c(0, df(secuencia, df1, df2), 0)
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polygon(cord.x, cord.y, col='lightsalmon3')
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altura <- df(x=percentil, df1, df2)
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shadowtext(x=percentil, y=altura/2, round(proba, 2),
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col="orchid2", cex=2)
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title(sub=bquote(P(F>.(percentil))==.(proba)), cex.sub=2)
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}}
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#----------------------------- chi ---------------------------------
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if(input$Distribucion == "chi.cuadrada"){
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if(input$Propede == "Percentil"){
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proba <- input$Probabilidad
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df=input$Grados
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percentil <- qchisq(p=proba, df, lower.tail=F)
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max.x <- qchisq(p=0.99, df)
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curve(dchisq(x, df), xlim=c(0, max.x), lwd=3,
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main=expression('Distribución' ~ chi^2), ylab="", xlab="", axes=FALSE)
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axis(1, at=seq(0, max.x, by=0.5), pos=0)
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axis(2, las=1)
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secuencia <- seq(percentil, max.x, length.out=10000)
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cord.x <- c(percentil, secuencia, max.x)
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cord.y <- c(0, dchisq(secuencia, df), 0)
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polygon(cord.x, cord.y, col='yellow3')
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shadowtext(x=percentil, y=0, round(percentil, 2),
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col="chartreuse", cex=2)
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title(sub=bquote(P(chi^2>.(percentil))==.(proba)), cex.sub=2)
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}
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else {
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df=input$Grados
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percentil=input$Percentil
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proba <- pchisq(q=percentil, df, lower.tail=F)
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max.x <- qchisq(p=0.99, df)
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curve(dchisq(x, df), xlim=c(0, max.x), lwd=3,
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main=expression('Distribución' ~ chi^2), ylab="", xlab="", axes=FALSE)
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axis(1, at=seq(0, max.x, by=0.5), pos=0)
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axis(2, las=1)
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secuencia <- seq(percentil, max.x, length.out=10000)
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cord.x <- c(percentil, secuencia, max.x)
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cord.y <- c(0, dchisq(secuencia, df), 0)
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polygon(cord.x, cord.y, col='yellow3')
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altura <- dchisq(x=percentil, df)
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shadowtext(x=percentil, y=altura/2, round(proba, 2),
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col="orchid2", cex=2)
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title(sub=bquote(P(chi^2>.(percentil))==.(proba)), cex.sub=2)
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}}
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})
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})
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ui.R
ADDED
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shinyUI(fluidPage(
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titlePanel("Distribuciones muestrales"),
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h4(p("Esta aplicación te ayudará a calcular probabilidades y
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percentiles de distribuciones asociadas al muestreo."),
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align="left"),
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sidebarLayout(
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sidebarPanel(
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selectInput(inputId="Distribucion",
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label="Elija la distribución:",
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choices=c("Normal", "t-student", "chi.cuadrada", "F"),
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selected="Normal"),
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conditionalPanel(condition="input.Distribucion=='Normal'",
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numericInput(inputId="Media",
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label=HTML("Ingrese la media μ:"),
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value="0",
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step=0.1),
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numericInput(inputId="Sd",
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label=HTML("Ingrese la desviacion σ:"),
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min=0.1,
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value="1",
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step=0.1) ),
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conditionalPanel(condition="input.Distribucion=='t-student'",
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numericInput(inputId="grados",
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label="Ingrese grados de libertad",
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min=0.1,
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step=0.1,
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value="1")),
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conditionalPanel(condition="input.Distribucion=='F'",
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numericInput(inputId="grados1",
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label="Ingrese los grados de libertad del numerador",
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value="10"),
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numericInput(inputId="grados2",
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label="Ingrese los grados de libertad del denominador",
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value="20")),
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conditionalPanel(condition="input.Distribucion=='chi.cuadrada'",
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numericInput(inputId="Grados",
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label="Ingrese los grados de libertad",
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value="3")),
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selectInput(inputId="Propede",
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label="Opciones para calcular:",
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choices=c("Probabilidad","Percentil"),
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selected="Percentil"),
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conditionalPanel(condition="input.Propede=='Probabilidad'",
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numericInput(inputId="Percentil",
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label="Ingrese percentil",
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value=1, step=0.01)),
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conditionalPanel(condition="input.Propede=='Percentil'",
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numericInput(inputId="Probabilidad",
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label="Ingrese probabilidad",
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value=0.70, step=0.001,
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62 |
+
min=0.001, max=0.999)),
|
63 |
+
img(src="logo.png", height = 56, width = 140),
|
64 |
+
img(src="udea.png", height = 65, width = 60),
|
65 |
+
br(),
|
66 |
+
p("App creada por el Semillero de R de la Universidad Nacional de Colombia:"),
|
67 |
+
tags$a(href="https://srunal.github.io", "https://srunal.github.io")
|
68 |
+
|
69 |
+
),
|
70 |
+
|
71 |
+
|
72 |
+
mainPanel(
|
73 |
+
tabsetPanel(type = "tabs",
|
74 |
+
tabPanel("Gráfica", plotOutput(outputId="miplot"))
|
75 |
+
|
76 |
+
|
77 |
+
)
|
78 |
+
)
|
79 |
+
)))
|