Update 08_motif_analysis.md

lessons/08_motif_analysis.md

@@ -63,6 +63,7 @@ STREME will accept **BED files or sequence files as input**, which must be in FA
 <br>Run the code provided below to create the object <code>olaps_wt</code>:<br><br>
 
 <pre>
+require(ChIPpeakAnno)
 sample_files <- list.files(path = "./data/macs2/narrowPeak/", full.names = T)
 
 # Reassign vars so that they are now GRanges instead of dataframes
@@ -88,6 +89,7 @@ Open up an R script file and call it `motif_analysis_prep.R` and add in a header
 library(tidyverse)
 library(GRanges)
 library(ChIPseeker)
+library(TxDb.Mmusculus. UCSC.mm10.knownGene)
 ```
 
 Let's begin by extracting the peaks which overlap across the replicates. Stored in the object are `mergedPeaks`, this corresponds to