this link shows how to creat a bar chart,but if the value of the input data is negative, the bar cannot be drawed, can anyone help me with this?thank you very much !
Well, that's it!... can deal only with positive values.
This case, what you want sounds like a new (not yet implemented) feature.
Just ask the author, pay someone, or sweat yourself in order to implement it.
"When in Rome, do as Romans do."
My blog: http://codexpert.ro/blog/author/ovidiu-cucu/
Thank you for your advice ! I have solve the problem by rewriting drawbar function!
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