library(shiny)
library(ggplot2)
linkedScatterUI <- function(id) {
ns <- NS(id)
fluidRow(
column(6, plotOutput(ns("plot1"), brush = ns("brush"))),
column(6, plotOutput(ns("plot2"), brush = ns("brush")))
)
}
linkedScatter <- function(input, output, session, data, left, right) {
# Yields the data frame with an additional column "selected_"
# that indicates whether that observation is brushed
dataWithSelection <- reactive({
brushedPoints(data(), input$brush, allRows = TRUE)
})
output$plot1 <- renderPlot({
scatterPlot(dataWithSelection(), left())
})
output$plot2 <- renderPlot({
scatterPlot(dataWithSelection(), right())
})
return(dataWithSelection)
}
scatterPlot <- function(data, cols) {
ggplot(data, aes_string(x = cols[1], y = cols[2])) +
geom_point(aes(color = selected_)) +
scale_color_manual(values = c("black", "#66D65C"), guide = FALSE)
}
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