(ORG-8538)
A new dialog/X-Function has been added for reducing columns in a worksheet. This is accessible from the Worksheet: Reduce Columns... menu.
The dialog has options for reducing columns by deleting-skipping columns, or by merging columns with options to merge by first point, average, min, max, sum etc.
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The reduce by merging values option has also been added to the Reduce Rows dialog.
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The image below show an example to reduce the unwanted columns which are introduced in the imported file
