R line chart from columns : any ideas how to create a Line chart? I tried but I got some error. my screenshot below there is a chart from Google Data studio and I want to re-create it in R. 

I tried to run this code but I got an error:

    plot(data[,1], data[,2],'l',col='blue')

where I think data[,1] <-- is the 'send time' from my column.
and data[,2] <-- is the 'open rate' I doubt that's correct but please help.


please see screenshot:

[see screenshot][1]


  [1]: https://i.stack.imgur.com/SeQvP.jpg