How I put a range for the y-values in a Bar Chart

Topics: Developer Forum
Mar 21, 2013 at 12:43 PM
I'm trying to do a Bar Chart. I achieved print the chart but I want put different lines to divide the chart area.
The result more or less have to seem like this:
http://www.eduteka.org/MI/Imagenes/barras_3.gif
and now I only have a bar chart without valor at the y-axis.

Have you got any idea or tip.
Thanks in advance.