# How to extract a row from a matrix in Matlab and Octave

To extract a row from a matrix in Matlab and Octave, type the row number (n) and colon symbol (:) instead of the column number.

**M(n,:)**

This command extracts the nth row from the array.

**Example**

Define a matrix 2x3

X = [1 2 1 ; 3 1 1]

The matrix has this structure

1 2 1

3 1 1

To extract the first row type

X(1,:)

The command extracts the first row

1 2 1

To extract the second row type

X(2,:)

The command extracts the second row

3 1 1

https://how.okpedia.org/en/matlab/how-to-extract-a-row-from-a-matrix-in-matlab-and-octave

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