Charts in ASOC

My script logs data and adds row hourly or daily to log file.

What is easiest way to newbie to chart this to line graph, bar chart or histogram. Are there any cli apps?

date data
20 2.3
21 2.9
22 2.3

Though I hate to recommend it, MS Excel can handle tabular data easily. Or if you can avoid the Evil Empire, Apple’s Numbers (iWork) should be able to handle data like that too.

Thanks. I really need this time cli.