Need to build dependency for 3 InsertUI fields coming from Excel sheet in RShiny
问题 I am pretty new to R and was trying to build a small utility just for my learning. I have 3 fields in my excel workbook named: Country State Cities All these fields should come as a drop down in UI. What I want to achieve is: 'when I make a selection for Country, a new drop down for State should get created with a list of States that falls under the Country selected. And based on the state selected the underlying cities should get populated in the drop down' I found a few examples online, but