X-Axis on my chart prints a black line instead of data
I am trying to create charts of time/temperature data. The data records include a time stamp and a temperature reading at 5 minute increments over a period of up to 3 days. If I put the time on the X-Axis, there are so many entries that none of the individual times are readable - just a thick black line appears. Is there any way to include every point in the Y-Axis (every temperature reading) but include an X-Axis label for every 10th timestamp?
The data looks like this, and may occur 400 times or so:
date time temp(C)
08/26/2012 01:00:00 0.2
08/26/2012 01:05:00 0.1
08/26/2012 01:10:00 0.0