Hi,

I encountered this issue when running saver:

Error in is.data.frame(x) : object 'mu' not found
Calls: saver ... calc.estimate -> do.call -> -> var -> is.data.frame
In addition: Warning message:
In if (!(grepl("matrix", class(x), ignore.case = TRUE))) { :
the condition has length > 1 and only the first element will be used
Execution halted

The code I used was:
res <- saver(d,ncores=detectCores(),size.factor=1)$estimate

Here d is a numeric matrix 15981 rows and 2796 columns. I have done library size normalization by myself so I set size.factor to be 1. I have checked the data and there is no NA values nor genes or cells with all zeroes. I wonder what is the potential cause of this problem? Thanks!