Array to SVG, flexible algorithm with PHP

problem: I've a couple of different arrays - e.g.:

• [0.21, 0.001, 0.0245, 0.31, 0.05, ...]

• [1234, 1342, 1232, 1625, 2200, 2205, 1804, ...]

• [5, 12, 42, 2, 32, 42, ...]

my problem now is: I'm looking for an algorithm to calculate a SVG Path for a simple chart like:

my current problem is the general algorithm and the calculating of the viewbox for each SVG. Hope someone can help?

via Chebli Mohamed