I'm learning this workflow of single cell analysis and I'm very confused about the explanation of the plot of plotExplanatoryVariables function. In the section 2.7, you mentioned that "The percentages are generally small (1-3%), indicating that the expression profiles of most genes are not strongly associated with this factor." But according to the plot, the peak is at 1. If 1 is in log10-scale, then it's 10 and it should be generally large (10%)?
Looking forward to your reply. Thanks very much!