sin_cell_ordering_iter: Fitting sinusoidal model
In kkdey/cellcycleR: For ordering the single cells on the cell cycle

Compute sinusoidal model estimates.

@author Kushal K Dey

@export @examples

1 2	sin_cell_ordering_iter(cycle_data, celltime_levels, cell_times_iter, fix.phase = FALSE, phase_in = NULL)

`cycle_data`	a N x G matrix, where N is number of cells, G number of genes
`fix.phase`	TRUE if cell_times is an ordered vector, i.e., the relative position of cells in time is known, and FALSE otherwise.
`cell_times`	a N x 1 vector of cell times (not ordered)