Hello all,

SupposeYis saved in sparse CSR formatby defining its values, columns and rowIndex vectors. Is that possible have access to its sub-matrices?For example:

| 1 -1 0 -3 0 |

| -1 5 0 0 0 |

Y = | 0 0 4 6 4 |

| -3 0 6 7 0 |

| 0 0 4 0 -5 |

values[13] = {1.0, -1.0, -3.0, -1.0, 5.0, 4.0, 6.0, 4.0, -3.0, 6.0, 7.0, 4.0, -5.0};

columns[13] = {0, 1, 3, 0, 1, 2, 3, 4, 0, 2, 3, 2, 4};

rowIndex[6] = {0, 3, 5, 8, 11, 13};

Can I have access to sub-matrices of Y , e.g. [-3 0 // 0 0 // 6 4] or [0 0 4 // -3 0 6// 0 0 4] ?

Thanks for your help,