diff --git a/R/snps-data.R b/R/snps-data.R
index f2817835d31355fb393667f53366242e1e987a15..33891806ece5a10a803247b4886625da7c5d7d93 100644
--- a/R/snps-data.R
+++ b/R/snps-data.R
@@ -5,8 +5,8 @@
 #'
 #' @format A data frame with 20 rows and 12 variables:
 #' \describe{
-#'   \item{positions}{location of the SNP on the chromosome e.g. in base pairs}
-#'   \item{distances}{genetic distance of the SNP from the start of the chromosome e.g. in centimorgans}
+#'   \item{bp_positions}{location of the SNP on the chromosome e.g. in base pairs}
+#'   \item{cM_distances}{genetic distance of the SNP from the start of the chromosome e.g. in centimorgans}
 #'   \item{chrom_1}{allele of the SNP on the first example chromosome}
 #'   \item{chrom_2}{allele of the SNP on the second example chromosome}
 #'   \item{chrom_3}{allele of the SNP on the third example chromosome}
diff --git a/data/snps.rda b/data/snps.rda
index d01801492e534d1e9a6791e154dc565a10bb8d7c..37f5e8a9a87757e8f6a3931a95febbe0c3ec0571 100644
Binary files a/data/snps.rda and b/data/snps.rda differ