How to Combine Charts Or Create A Chart From Multiple Rows/Columns

Hi,

I am writing a program that allows you to select a range of dates that have prices corresponding to them, and graph the results. Prices are computed hourly, not daily, so the data is arranged like so:

Date1 Hour 1 Hour 2 .... Hour 24
Date 2
Date 3
.
.
.
Date n

I want to be able to change this data so that I can graph it as a continuous set of days. Right now I only know how to graph the hourly prices of one day. Any Ideas how I could maybe merge these graphs? Or format the data in such a way that it allows me to graph a series of days?

Any help would be appreciated