This function can be used as a hacky way to extract the
numeric values from an STC-S
(for instance ObsCore/EPNcore s_region
) string.
The details of this function's behaviour may change in future releases.
parseDoubles("1.3, 99e1, NaN, -23")
= [1.3, 990.0, NaN, -23.0]
parseDoubles("Polygon ICRS 0.8 2.1 9.0 2.1 6.2 8.6")
= [0.8, 2.1, 9.0, 2.1, 6.2, 8.6]
parseDoubles("La la la") = []