# Manuals/calci/BLOCKDIAGONAL

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**MATRIX (TypeOfMatrix,DimensionsOfMatrix,SeedValuesToUse,IJFunction,PreParameter,IsItInternalCall)**

- is the type of the matrix.
- is the order of the Block diagonal matrix.

## Description

- This function gives matrix of order 3 which is satisfying the property of the block diagonal matrix.
- A block matrix is a matrix that is defined using smaller matrices, called blocks.
- For e.g.,

where A, B, C, and D are themselves matrices, is a block matrix.

- Two block matrices have the same shape and their diagonal blocks are square matrices, then they multiply similarly to matrix multiplication.
- In Calci, MATRIX("BLOCK-DIAGONAL") is showing the matrix of order 3 with the entry of 0.
- Users can change the order as well as the entries of that matrix.

## Examples

- MATRIX("block-diagonal",3)

0 | 0 | 0 |

0 | 0 | 0 |

0 | 0 | 0 |

- MATRIX("BLOCK-DIAGONAL",4,5..7**2)

5 6 7 5 6 7 |
0 | 0 | 0 |

0 |
5 6 7 5 6 7 |
0 | 0 |

0 | 0 |
5 6 7 5 6 7 |
0 |

0 | 0 | 0 |
5 6 7 5 6 7 |