[R] categorized barplot

[Rafael Moral]

Dear useRs,

I can't seem to find out how to categorize my histogram.

I have the following dataset:

Time            First.day  Second.day
08:00-10:00        9             8
10:00-12:00       13           15
12:00-14:00        9             9
14:00-16:00       10            9

I attached a jpeg file to this e-mail containing the sketches.
What I'd like to do is a barplot (or histogram), firstly with 2 categories - first and second day (figure 1)
And then with 4 categories - the times (figure 2)
Also, I'd like the graphs both with lines (as sketched) and bars.

Thanks in advance,
Kind regards,

Rafael.


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