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Last active June 17, 2021 18:37
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Shiny example: Diamonds Explorer
function(input, output) {
dataset <- reactive({
diamonds[sample(nrow(diamonds), input$sampleSize),]
output$plot <- renderPlot({
p <- ggplot(dataset(), aes_string(x=input$x, y=input$y)) + geom_point()
if (input$color != 'None')
p <- p + aes_string(color=input$color)
facets <- paste(input$facet_row, '~', input$facet_col)
if (facets != '. ~ .')
p <- p + facet_grid(facets)
if (input$jitter)
p <- p + geom_jitter()
if (input$smooth)
p <- p + geom_smooth()
}, height=700)
dataset <- diamonds
headerPanel("Diamonds Explorer"),
sliderInput('sampleSize', 'Sample Size', min=1, max=nrow(dataset),
value=min(1000, nrow(dataset)), step=500, round=0),
selectInput('x', 'X', names(dataset)),
selectInput('y', 'Y', names(dataset), names(dataset)[[2]]),
selectInput('color', 'Color', c('None', names(dataset))),
checkboxInput('jitter', 'Jitter'),
checkboxInput('smooth', 'Smooth'),
selectInput('facet_row', 'Facet Row', c(None='.', names(dataset))),
selectInput('facet_col', 'Facet Column', c(None='.', names(dataset)))
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Nevermind. Found I had another bug. Print command works FINE for both.

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I am getting an error:

Warning: Error in as.character: cannot coerce type 'environment' to vector of type 'character'
Stack trace (innermost first):
    4: <Anonymous>
    2: print.shiny.appobj
    1: <Promise>
Error : cannot coerce type 'environment' to vector of type 'character'

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