trend1d(1gmt) on Linux
The text 1fee95ced9db, as Debian 8 (Jessie) shipped it.
Fit a [weighted] [robust] polynomial [or Fourier] model for y = f(x) to xy[w] data.
Flags it lists
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-: -
-C -
-H -
-I -
-V -
-W -
-bi -
-bo -
-f