- healpy.sphtfunc.synalm(cls, lmax=None, mmax=None, new=False, verbose=True)¶
Generate a set of alm given cl. The cl are given as a float array. Corresponding alm are generated. If lmax is None, it is assumed lmax=cl.size-1 If mmax is None, it is assumed mmax=lmax.
- clsfloat, array or tuple of arrays
Either one cl (1D array) or a tuple of either 4 cl or of n*(n+1)/2 cl. Some of the cl may be None, implying no cross-correlation. See new parameter.
- lmaxint, scalar, optional
The lmax (if None or <0, the largest size-1 of cls)
- mmaxint, scalar, optional
The mmax (if None or <0, =lmax)
- newbool, optional
If True, use the new ordering of cl’s, ie by diagonal (e.g. TT, EE, BB, TE, EB, TB or TT, EE, BB, TE if 4 cl as input). If False, use the old ordering, ie by row (e.g. TT, TE, TB, EE, EB, BB or TT, TE, EE, BB if 4 cl as input).
- almsarray or list of arrays
the generated alm if one spectrum is given, or a list of n alms (with n(n+1)/2 the number of input cl, or n=3 if there are 4 input cl).
We don’t plan to change the default order anymore, that would break old code in a way difficult to debug.