1 files changed, 23 insertions, 0 deletions
diff --git a/lib/roo/formatters/matrix.rb b/lib/roo/formatters/matrix.rb
new file mode 100644
index 0000000..39c7381
--- /dev/null
+++ b/lib/roo/formatters/matrix.rb
@@ -0,0 +1,23 @@
+module Roo
+  module Formatters
+    module Matrix
+      # returns a matrix object from the whole sheet or a rectangular area of a sheet
+      def to_matrix(from_row = nil, from_column = nil, to_row = nil, to_column = nil, sheet = default_sheet)
+        require 'matrix'
+
+        return ::Matrix.empty unless first_row
+
+        from_row ||= first_row(sheet)
+        to_row ||= last_row(sheet)
+        from_column ||= first_column(sheet)
+        to_column ||= last_column(sheet)
+
+        ::Matrix.rows(from_row.upto(to_row).map do |row|
+          from_column.upto(to_column).map do |col|
+            cell(row, col, sheet)
+          end
+        end)
+      end
+    end
+  end
+end