diff --git a/R/CalculationFunctions.R b/R/CalculationFunctions.R
index bf74a80e..ff6242f3 100644
--- a/R/CalculationFunctions.R
+++ b/R/CalculationFunctions.R
@@ -426,10 +426,10 @@ calculateFlowContributiontoImpact <- function (model, sector, indicator, domesti
 
 #' Aggregate result matrix by rows
 #'
-#' @param matrix      A matrix with sectors as rows
+#' @param matrix      A result calculation matrix (e.g. `G` or `H`) with sectors as rows
 #' @param to_level    The level of BEA code this matrix will be aggregated to
 #' @param crosswalk   Sector crosswalk between levels of detail
-#' @return An aggregated matrix with sectors as rows
+#' @return An aggregated result calculation matrix with sectors as rows
 aggregateResultMatrixbyRow <- function (matrix, to_level, crosswalk) {
   # Determine the columns within MasterCrosswalk that will be used in aggregation
   from_code <- "USEEIO"
@@ -450,7 +450,8 @@ aggregateResultMatrixbyRow <- function (matrix, to_level, crosswalk) {
 
 #' Aggregate result matrix by rows and columns
 #'
-#' @param matrix      A matrix with sectors as rows and columns
+#' @param matrix      A matrix of inventory or impact results with sectors as both rows and columns,
+#' such as the output from calculateSectorPurchasedbySectorSourcedImpact()
 #' @param to_level    The level of BEA code this matrix will be aggregated to
 #' @param crosswalk   Sector crosswalk between levels of detail
 #' @return An aggregated matrix with sectors as rows and columns
diff --git a/man/aggregateResultMatrix.Rd b/man/aggregateResultMatrix.Rd
index 15080cd9..1b11d984 100644
--- a/man/aggregateResultMatrix.Rd
+++ b/man/aggregateResultMatrix.Rd
@@ -7,7 +7,8 @@
 aggregateResultMatrix(matrix, to_level, crosswalk)
 }
 \arguments{
-\item{matrix}{A matrix with sectors as rows and columns}
+\item{matrix}{A matrix of inventory or impact results with sectors as both rows and columns,
+such as the output from calculateSectorPurchasedbySectorSourcedImpact()}
 
 \item{to_level}{The level of BEA code this matrix will be aggregated to}
 
diff --git a/man/aggregateResultMatrixbyRow.Rd b/man/aggregateResultMatrixbyRow.Rd
index 9af4b266..15302bb2 100644
--- a/man/aggregateResultMatrixbyRow.Rd
+++ b/man/aggregateResultMatrixbyRow.Rd
@@ -7,14 +7,14 @@
 aggregateResultMatrixbyRow(matrix, to_level, crosswalk)
 }
 \arguments{
-\item{matrix}{A matrix with sectors as rows}
+\item{matrix}{A result calculation matrix (e.g. `G` or `H`) with sectors as rows}
 
 \item{to_level}{The level of BEA code this matrix will be aggregated to}
 
 \item{crosswalk}{Sector crosswalk between levels of detail}
 }
 \value{
-An aggregated matrix with sectors as rows
+An aggregated result calculation matrix with sectors as rows
 }
 \description{
 Aggregate result matrix by rows