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| library(shiny) | |
| source("auxiliar.R") | |
| shinyServer(function(input, output) | |
| { | |
| output$grafico1 <- renderPlot({ | |
| res <- pmf(a=input$min, | |
| b=input$max, | |
| pmf=input$pmf) | |
| x_vals <- res$x_vals | |
| probs <- res$probs | |
| cumul_probs <- res$cumul_probs | |
| suma <- res$suma | |
| if (input$min > input$max | suma > 1.01 | suma < 0.99) { | |
| plot(c(-5, 5), c(0, 1), xlab="", ylab="", type='n', | |
| xaxt='n', yaxt='n', bty='n') | |
| text(x=0, y=0.7, col='red', cex=2, | |
| label='Revise los valores que ingres贸.') | |
| text(x=0, y=0.5, col='orange', cex=1.5, | |
| label=paste('La suma de las probabilidades es', suma)) | |
| text(x=0, y=0.3, col='purple', cex=1, | |
| label='El m铆nimo no puede ser mayor que el m谩ximo.') | |
| } | |
| else { | |
| par(mfrow=c(1, 2)) | |
| # Para dibujar f(x) | |
| plot(x=x_vals, y=probs, las=1, | |
| xlab="X", ylab="f(x)", | |
| main="Funci贸n de masa", | |
| type="h", lwd=3, col="steelblue") | |
| grid() | |
| # Para dibujar F(x) | |
| F <- stepfun(x=x_vals, y=c(0, cumul_probs), right=TRUE) | |
| plot(F, verticals=FALSE, | |
| lwd=3, col="steelblue", las=1, | |
| xlab="X", ylab="F(x)", | |
| main="Funci贸n acumulada") | |
| grid() | |
| } | |
| }) | |
| output$med_var <- renderText({ | |
| res <- pmf(a=input$min, | |
| b=input$max, | |
| pmf=input$pmf) | |
| x_vals <- res$x_vals | |
| probs <- res$probs | |
| cumul_probs <- res$cumul_probs | |
| suma <- res$suma | |
| esperanza <- sum(x_vals * probs) | |
| varianza <- sum((x_vals - esperanza)^2 * probs) | |
| if (input$min > input$max | suma > 1.01 | suma < 0.99) { | |
| paste(c("Hay algo errado!!!")) | |
| } | |
| else { | |
| paste0(c("La v.a. X tiene E(X)=", | |
| round(esperanza, 4), | |
| "y Var(X)=", round(varianza, 4))) | |
| } | |
| }) | |
| output$tabla_probs <- renderTable({ | |
| res <- pmf(a=input$min, | |
| b=input$max, | |
| pmf=input$pmf) | |
| x_vals <- res$x_vals | |
| probs <- res$probs | |
| cumul_probs <- res$cumul_probs | |
| suma <- res$suma | |
| if (input$min > input$max | suma > 1.01 | suma < 0.99) { | |
| paste(c("Hay algo errado!!!")) | |
| } | |
| else { | |
| data.frame("X"=x_vals, | |
| "f(x)"=probs, | |
| "F(x)"=cumul_probs, | |
| check.names = FALSE) | |
| } | |
| }, digits=6, bordered = TRUE, align = "c") | |
| }) |