Questions tagged [matrix]

A matrix is a list of numbers arranged in a rectangle with rows and columns. In programming, it is also known as a 2D array. Use this tag if your challenge is about manipulating matrices.

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Checkerboard the Matrix

Task Given a matrix, your program/function should output a row-equivalent matrix in checkerboard form ( \$A_{ij}=0\$ if and only if \$i+j\$ is odd). Two matrices are defined to be row-equivalent if ...
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Cover positions with snakes of same 'colour'

Imagine a grid where the origin square \$(0,0)\$ is at the top left of the screen, and positive \$x\$ is rightwards whereas positive \$y\$ is downwards. Coloured squares are at various positions on ...