If you Named index data is 0 or 1 based

Fig.Plot(1..10).Index.Base = 0|1

Byte:     0,1

Default:  0    (can be set in the Default Configuration)

Depending on how you have indexed your starting data point.

Most programming languages define 0 as the first data point in an array. While humans typically think of 1 as being the first data point.

This allows you to index your data in the way that suites your needs.