Origin has a tool for removing rows in a worksheet based on duplication in one or more columns. When multiple columns are selected, all values within a row must match to be considered as duplicates. You can opt to specify a tolerance value.
To open this dialog box:
Controls recalculation of analysis results
For more information, see: Recalculating Analysis Results
The source column(s) which contain the duplicated data. If multiple columns has been selected, only the rows contains duplicate values in all selected columns will be reduced.
Specify how to reduce worksheet with duplicated rows.
Specify whether to be case sensitive in comparing two strings.
Check the box and provide a tolerance value to treat close values as duplicates.
Specify output worksheet.
For help with the range controls, see: Output Results
Count and output the number of duplicate rows.