bubble chart - Is there some algorithm to map a list of numbers to some that vary less? -


i'm working on bubble chart, , having trouble calculating bubble radius.

i want use quantity calculate bubble radius, quantity varies lot. minimum 340, maximum 190000 points between 5000 30000. these ranges extreme use quantity radius directly.

is there algorithm "smooth" curve of data? or method map original quantity more reasonable one?

right graph scatter chart, because can not translate bubble chart without radius.

have considered using logarithm of data? using base 10 example, bounds become

| original | log_10 | |     340  |    2.5 | |   5,000  |    3.7 | |  30,000  |    4.5 | | 190,000  |    5.3 |

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