CSV scale integer column

csv-scale-integer-column · version 1.0.0 · CSV & tables · free, no key needed

Multiply every data cell in a named CSV column by a canonical integer factor.

Use when you need to: csv scale integer column · multiply csv integer column · scale csv column by integer.

Supported

• csv scale integer column
• multiply csv integer column
• scale csv column by integer

Not supported

• floating point scale
• percentage scale
• infer numeric types
• locale grouping separators
• read files
• fetch urls

Behavior

• The first CSV record is the header row. Duplicate and empty header names are rejected.
• column names an existing header exactly; no trimming, case folding, or fuzzy matching.
• factor and every data cell in column are canonical integer strings parsed with BigInt. Empty cells are invalid. -0 is accepted and canonicalized to 0.
• Each output cell is the canonical integer string of the product of the input cell and factor.
• Each product may have at most 1000 digits excluding sign; overflow is invalid_input.
• An empty document without a header is rejected. A header-only document is returned unchanged.
• Other columns and row order are preserved. The first output header name may not begin with U+FEFF.

Input

• csv (string, required): max length 256000
• column (string, required): min length 1; max length 256
• factor (string, required): min length 1; max length 1001

Output

• csv (string, required)

Limits

• max input bytes: 256000
• max data rows: 5000
• max columns: 256
• max header name bytes: 256
• max integer digits: 1000
• max output bytes: 256000

Example

Request input:

{
  "csv": "qty,name\n3,Ada\n-2,Lin\n0,Zoe\n",
  "column": "qty",
  "factor": "4"
}

Response:

{
  "result": {
    "csv": "qty,name\n12,Ada\n-8,Lin\n0,Zoe\n"
  }
}

How to call it

MCP

Connect https://computefirst.net/mcp (setup), then call execute with:

{
  "id": "csv-scale-integer-column",
  "version": "1.0.0",
  "input": {
    "csv": "qty,name\n3,Ada\n-2,Lin\n0,Zoe\n",
    "column": "qty",
    "factor": "4"
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/csv-scale-integer-column/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"csv":"qty,name\n3,Ada\n-2,Lin\n0,Zoe\n","column":"qty","factor":"4"}'

The machine-readable contract is at /v1/tools/csv-scale-integer-column/versions/1.0.0.

CLI

node cli.mjs run csv-scale-integer-column 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

Related tools

• CSV abs integer column: Replace every data cell in a named CSV column with the absolute value of a canonical integer.
• CSV clamp integer column: Clamp every data cell in a named CSV column to optional canonical integer min and max bounds.
• CSV filter equals: Keep CSV data rows whose named column equals an exact string.
• CSV split column: Split one CSV column on an exact separator into uniquely named columns.
• CSV sum integers: Sum a CSV column of strict signed base-10 integer strings using BigInt.
• CSV dedupe: Remove duplicate CSV data rows while preserving the first occurrence.