Peak2Gene heatmap with unbalanced groups

[benayang]

Hello,

I have integrated data across 2 time points (Young and Aged) and have isolated a cell type cluster of interest as a separate ArchR project using subsetArchRProject. I've added Peak2Gene linkages and am interested in identifying age-specific linkages using plotPeak2GeneHeatmap with age as the "groupBy" paramter. The two time points are imbalanced (Young -- 402, Aged -- 178) and the resulting heatmap only shows results for the Young time point. Loading the seATAC-Group-KNN.rds object and tabulating the number of Young and Aged cells per KNN grouping shows a strong bias towards Young cells (shown below). Is there a way to make the groupings more even so linkages are provided for both Young and Aged?