I generate PNG Charts with JPGraph. It works ok, but I have the problem, that the quality of the pictures is very poor when printing it. It is very grainy. I read the docs, but I did not find anything how to improve the image quality of the charts. Especially the labels and the
I tried to create the charts with a higher width and height, but this does not work, because the gaps between the ticks get bigger.
Do you have any ideas how to create "print ready" charts with jpGraph?
You ideally need to be creating vector graphics if you want to produce something that can be scaled up and will print nicely.
Take a look at this, it is the best thing I can find in the first few results on Google (which, by the way, will be your friend, if your nice to it...)