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9.8.4 Week scale

Week scales, if enabled, by default shows the week number in range 1 to 53 (as defined by ISO-8601, see the reference section).

It might be worth pointing out here that the week number calculation is carried out within JpGraph and does not rely on the underlying OS date libraries. This makes the behavior consistent over several OS:s (at least M$ Windows does not comply to ISO-8601 or supply any way of doing this through the normal libraries, e.g. strftime())

You may modify the week behavior in three ways. You can specify (with SetStyle()) a different date format using the constants


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