1 | initial version |

You can use `ones_matrix`

, which returns a matrix with all entries equal to 1. So, to build, say, an $1000\times1000$ matrix with all entries being $-1$, you can simply write `-ones_matrix(1000,1000)`

.

2 | No.2 Revision |

~~You ~~As another alternative, you can use `ones_matrix`

, which returns a matrix with all entries equal to 1. So, to build, say, an $1000\times1000$ matrix with all entries being $-1$, you can simply write `-ones_matrix(1000,1000)`

.

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