i have a function like this:
# show a plot and run a script when the user clicks on a plot,
# where the script arguments correspond to the user-selected point.
blah <- function(x, y) {
plot(y~x)
n <- identify(x=x, y=y)
com <- system(command=paste("bleh", names(y)[n]))
}
i would like to do this via a web page instead of x11() etc. eg:
1) a user clicks on an image in their web browser
2) the i,j coordinate is sent to the server
3) a single R process determines the nearest data point
4) the server sends a new page to the client, based on attributes
of the selected data point
i've browsed the R web interface options and frankly don't know which
to pick, or maybe they are all overkill for what i am trying to
accomplish? perhaps the easiest thing to do is use ismap to capture
the i,j coords, the receiving cgi script connects to an R process for
the data lookup, and then responds to the browsing client
appropriately. the data set involved is very large, so i'd need a
single R process sitting there waiting for such queries in order to
avoid initialize&load time - this is the part i am particularly
unclear how to do.
any ideas/suggestions/guidance on the best approach would be much
appreciated. thank you.