xy2traceset¶

pydl.pydlutils.trace.xy2traceset(xpos, ypos, **kwargs)[source]¶

Convert from x,y positions to a trace set.

Parameters:

xpos, yposarray-like: X,Y positions corresponding as [nx,Ntrace] arrays.
invvararray-like, optional: Inverse variances for fitting.
funcstr, optional: Function type for fitting; defaults to ‘legendre’.
ncoeffint, optional: Number of coefficients to fit. Defaults to 3.
xmin, xmaxfloat, optional: Explicitly set minimum and maximum values, instead of computing them from xpos.
maxiterint, optional: Maximum number of rejection iterations; set to 0 for no rejection; default to 10.
inmaskarray-like, optional: Mask set to 1 for good points and 0 for rejected points; same dimensions as xpos, ypos. Points rejected by inmask are always rejected from the fits (the rejection is “sticky”), and will also be marked as rejected in the outmask attribute.
ia, inputans, inputfuncarray-like, optional: These arguments will be passed to func_fit().
xjumplofloat, optional: x position locating start of an x discontinuity
xjumphifloat, optional: x position locating end of that x discontinuity
xjumpvalfloat, optional: magnitude of the discontinuity “jump” between those bounds (previous 3 keywords motivated by BOSS 2-phase readout)

Returns: