I am graphing a two-column data set that looks like this:
1/1/1963 3,209,827,882 1/1/1964 3,281,201,306 1/1/1965 3,350,425,793
But when I try to set the Value Labels in either a Line Chart or a Scatter Plot to "Date & Time" or "Duration" I find that they are greyed out.
Why would this be? In what situations is it possible to use these two options?