Origin has a tool for reducing data by deleting or merging worksheet rows according to a user-defined pattern, or by deleting masked rows.
To open the tool:
The wreducerows dialog box is built upon the wreducrows X-Function.
The data input range.
For help with range controls, see: Specifying Your Input Data
Option depends on your selection of Reduce Method: Delete N rows... (Delete Rows) or Reduce N rows... (Merge Rows). Number of rows to merge or delete.
Option is only available when selecting Reduce Method = Delete N rows, then skip M rows. Specify number of rows to skip.
Available when Reduce Method = Reduce N rows with merged values. Specify value to replace merged data points.
The starting row to merge/delete.
Specify output range.
For help with the range controls, see: Output Results