Can't assign vertical task role in line plot wizard

[yliu0217]

I used the import file wizard to import a text file and it was successfully shown as output data. While I was trying to plot my data using the line plot wizard, it did allow me to assign the vertical variable. I could assign the horizaontal one using the drop-down list, but couldn't click the down arrow for vertical. 

I also tried to make a line plot not using the wizard, same thing. In Data>Task roles, it just didn't allow me to add for the vertical variable. 

Any ideas? Thanks in advance.

[ballardw]

The desired type of plot and the data type may be incompatible.

If you attempted to show some example data it did not come through.

A series plot, the basic x y connected will want the Y to be numeric. If for some reason your variable is actually character then it wizard wouldn't like that.

[yliu0217]

Thanks ballardow! You are totally right. Just realized my variable is character.