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ExcelExcel 2013+

MUNIT function in Excel

Returns the unit matrix or the specified dimension

=MUNIT(dimension)

MUNIT syntax and parameters

One argument, one required.

  • dimensionnumberRequired

MUNIT examples

Formulas you'll actually reuse.

  1. A 3×3 identity matrix — ones on the diagonal, zeros elsewhere:

    =MUNIT(3)

  2. Multiplying by the identity returns the matrix unchanged — a sanity check:

    =MMULT(B2:D4, MUNIT(3))

MUNIT in Google Sheets

Same name — your formula ports as-is.

Try MUNIT in the playground

Edit the example — nothing to install.

Preloaded with the MUNIT formula from Example 1 — change anything and watch it respond.

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Related functions

More ways Excel gets this done.