I have the following proyect.

I have a Shiny app where the user selects a date and metric, and shows a line graph.

I have a Shiny app twhere the user selects a date and metric, and shows a line graph.

I am trying to create an app, which has 7 different sidebar menu items with one input ID like menu_items_id and based on this selection I have to update another pickerInput which has the location filters with another input id which is region_select. So when any of the options out of the 7 options from the menu_items_id is selected, I want the region_select id to give only the approriate regions.

I am trying to create an app, which has 7 different sidebar menu items with one input ID like menu_items_id and based on this selection I have to update another pickerInput which has the location filters with another input id which is region_select. So when any of the options out of the 7 options from the menu_items_id is selected, I want the region_select id to give only the approriate regions.

My question relates to reactive expressions in R Shiny inputs. For instance, say my first user input is Country. I want my next input to be States of that country. In particular, if the user selects a different country, their second input will change correspondingly. Naturally the US and Canada have different states. How would I go about doing this? Thanks!

I’m learning about Shiny and keep running into the following issue.

I’m fairly new to Shiny and am running into the following issue where i can’t find a variable

This is a follow-up to a previous question.

I am new to R Shiny, and am writing an app to analyze data and produce graphs based on user inputs. However, I am getting the following error code: