Numeric input don't work in apriori in R shiny
<p>I have this code in ui.R:</p>

<pre><code>tabPanel("Experiment 1",sidebarPanel(numericInput("supp", "Vložte hodnotu support", 0.0001, min = 0.0001, max = 0.8, step = 0.0001),
                        numericInput("conf", "Vložte hodnotu confidence", 0.0001, min = 0.0001, max = 0.8, step = 0.0001)),
</code></pre>

<p>and this code in server.R:</p>

<pre><code>rules.all &lt;- apriori(d, parameter=list(support=input$supp, confidence=input$conf))

library(arulesViz)

output$scatterPlot = renderPlot(
plot(rules.all, method = 'scatterplot')
)
</code></pre>

<p>I have this error:
When I change support and confidence values in numericInput, R shiny didn't display any scatter plot. Why didn't it work ? 
Help me please. </p>