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In google docs, I have the following data

    |   A |  B  |  C  |  ...  | N  | TOTALS       |
  1 |  123|  425|  324|  ...  | 234| =SUM(A1:N1)  |
  2 |  123|  425|  324|  ...  | 234| =SUM(A2:N2)  |
  3 |  123|  425|  324|  ...  | 234| =SUM(31:N3)  |

How can I create the TOTALS column using ARRAYFORMULA.

ARRAYFORMULA(SUM(A1:C99)) will give a single number, the sum of all the cells, thats not what I want

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Best practice is to accept and/or upvote an answer. –  Jacob Jan Tuinstra Dec 19 '13 at 16:14

1 Answer 1

Use the following formula to do that.

Formula

=MMULT(B2:E4,TRANSPOSE(ARRAYFORMULA(COLUMN(B2:E4)^0)))

Explained

The ARRAYFORMULA is meant to return the complete range, as set by the COLUMN formula. The ^0 (power of zero) will always return 1. Therefore each result is multiplied by 1 (yielding the same value) and summed.

Example

I've created an example file for you: SUM OVER ROWS

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Thanks, that is really convoluted ! –  Yisrael Dov Dec 19 '13 at 15:58

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