I am trying to make multiple dynamic plots (one does not know how many plots will output) based on one or more selected dropdown value(s) (species in this case).

I did succeed making plots based on the dropdown. For instance, two plots are displayed if a user selected two values/species from the dropdown list, one plot is displayed if one value/species is selected.

Although the number of plots match the number of dropdown values, the plots show a duplicate if two or more dropdown values/species are selected (it only works if exactly one value is selected). Any advice would be of great help.

The below code uses the iris dataset in R.