I’d like to draw some statistics charts using QT4.7 ,
here are some examples:
example pictures
what’s the best way to do that?
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There is no “best” way, but out of my personal experience i recommend Qwt. Consistent documentation is generally something to desire (basically doxygen only), but it is open source and IMHO clean and understandable internal design. The license is a loosened LGPL.