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renderImage example for Shiny
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shinyServer(function(input, output, clientData) { | |
output$myImage <- renderImage({ | |
# A temp file to save the output. | |
# This file will be removed later by renderImage | |
outfile <- tempfile(fileext='.png') | |
# Generate the PNG | |
png(outfile, width=400, height=300) | |
hist(rnorm(input$obs), main="Generated in renderImage()") | |
dev.off() | |
# Return a list containing the filename | |
list(src = outfile, | |
contentType = 'image/png', | |
width = 400, | |
height = 300, | |
alt = "This is alternate text") | |
}, deleteFile = TRUE) | |
}) |
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shinyUI(pageWithSidebar( | |
headerPanel("renderImage example"), | |
sidebarPanel( | |
sliderInput("obs", "Number of observations:", | |
min = 0, max = 1000, value = 500) | |
), | |
mainPanel( | |
imageOutput("myImage") | |
) | |
)) |
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