Louvain clustering for a SRT data
Cluster_Louvain(SRTProj, resolution = 0.8, reduction = "PCA", ...)
an object named "SRTProject". The object SRTProject is created by CreateSRTProject.
an positive real, specify the resolution.
a string, specify the reduction slot name in SRTProj for fitting Louvain model.
other parameters pass to model_set_Louvain.