r - how to display dynamic values in gvisBarChart hAxes and vAxes -

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need in displaying dynamic values/strings in haxes , vaxes part of gvisbarchart

sample tried below:

  haxes=paste("[{title:", input$ddllgraphmeasure, "}]")

input$ddllgraphmeasure - dynamic input value

but not working. please suggest way this.


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