Extracting peak matrix with peak ranges

[sneddonucsf]

Hello,

I have a list of peaks of interest that I have some additional annotation for. I would like to subset my peak set so that I can plot the peaks across pseudotime outside of ArchR with some row annotations (ex. what cell type the peak is associated with). When I get my peak matrix with

peaks = getMatrixFromProject(proj, useMatrix = "PeakMatrix")

this returns the SE object. However, when I get the peak matrix with

PM = assays(peaks)$PeakMatrix
PM[1:3, 1:3]

I can see that the rownames of the matrix are not peak ranges

3 x 3 sparse Matrix of class "dgCMatrix"
     Arrow1#GAAGTGGAGCCTGTAT-1 Arrow1#ACTCGGGCAAGGCGTA-1 Arrow1#AGGCGTCGTGCACATT-1
[1,]                           .                           .                           .
[2,]                           .                           .                           .
[3,]                           .                           2                           2

How can I get the ranges associated with these counts so that I can map my row annotations to the heatmap? Does the matrix rownames follow the same order as the ranges in the PeakSet? Apologies if I am completely misunderstanding this!

[rcorces]

https://www.bioconductor.org/help/course-materials/2019/BSS2019/04_Practical_CoreApproachesInBioconductor.html

You're looking for rowRanges()

[sneddonucsf]

Thank you!