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CSV Lag and Lead Column

Append an offset value from another row in the same column.

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CSV previous next row column online

Append an offset value from another row in the same column. Use this when inspecting structured input or preparing a data or code artifact. Generated commands and configurations remain text until you review and use them yourself.

How to use it

Paste the multi-line input in the format shown below. Set column, row offset (-1 previous, 1 next). Choose Run tool. Review the output, then copy or download it.

Options and example settings

Option	Choices / value	Example default
Column	Enter column.	amount
Row offset (-1 previous, 1 next)	Enter row offset (-1 previous, 1 next).	-1

Worked examples

Use this when inspecting structured input or preparing a data or code artifact. Generated commands and configurations remain text until you review and use them yourself.

Reproducible worked example

Settings: Column: amount; Row offset (-1 previous, 1 next): -1

Input:

name,team,amount
Anna,A,10
Ben,B,20
Cara,A,30

With the input and settings above, the tool produces:

Output:

name,team,amount,amount_offset
Anna,A,10,
Ben,B,20,10
Cara,A,30,20

The example output has 4 lines. Compare its order, separators and whitespace with the input before copying the result.

Limitations and common mistakes

Results reflect your supplied input and selected settings. Check the worked example and output before reuse.
Combined input is bounded to 150,000 characters; output text is bounded to 1.2 million characters. Some algorithms impose smaller limits, stated in their error messages.

Frequently asked questions

What format should I enter?

Paste the multi-line input in the format shown below. The worked example shows the supported structure and actual output.

How can I append an offset value from another row in the same column in CSV data online?

Paste the multi-line input in the format shown below. Set column, row offset (-1 previous, 1 next). Choose Run tool. Review the output, then copy or download it.

Where is my input processed?

The bundled tool processes input in your browser. It does not upload tool input to a conversion service. Other site plugins, analytics, advertising and browser extensions may have separate behavior.