1.sc.pp.normalize_per_cell()

https://scanpy.readthedocs.io/en/stable/api/scanpy.pp.normalize_per_cell.html

Normalize each cell by total counts over all genes, so that every cell has the same total count after normalization.

默认情况下是选择所有cell的UMI的中值作为所有的细胞细胞normalize之后的统一的结果。

2.sc.pp.log1p()

https://scanpy.readthedocs.io/en/stable/api/scanpy.pp.log1p.html

 简单地取log(x+1)。

3.sc.pp.scale()

https://scanpy.readthedocs.io/en/stable/api/scanpy.pp.scale.html

均值为0，方差为1。