### get geometric mean back for cytof data?

Yet I noticed some clusters from phenograph exhibit bimodal distribution or contain 'long tail' towards high value on some channels, and it makes median a biased representation, in my opinion.

So I start to think about Geometric mean(GM) which we use a lot in FACS data analysis. However, there is a zero issue for GM analysis. If the data contains zero value, the geometric mean will become 0 no matter how many positive values there are. Currently, there are several ways to deal with zero value for GM analysis, one way is to add "1" or "0.001" to all the values, both zero values and non-zero values, but I am not sure it is legal to do such a data transformation for cytof data.

It would be very much great if anyone could provide some insight on this, thanks a lot!

Wen