forked from root/public
Augusto
4 years ago
4 changed files with 139 additions and 0 deletions
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# This file is automatically @generated by Cargo. |
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# It is not intended for manual editing. |
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[[package]] |
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name = "lalgebra_scalar" |
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version = "0.1.0" |
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[[package]] |
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name = "matrix" |
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version = "0.1.0" |
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dependencies = [ |
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"lalgebra_scalar", |
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] |
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[[package]] |
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name = "matrix_test" |
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version = "0.1.0" |
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dependencies = [ |
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"matrix", |
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] |
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[package] |
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name = "matrix_test" |
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version = "0.1.0" |
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authors = ["Augusto <aug.ornelas@gmail.com>"] |
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edition = "2018" |
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html |
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[dependencies] |
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matrix = { path = "../../../../rust-piscine-solutions/matrix"} |
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// Now define the matrix multiplication by implementing the
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// std::ops::Mul for the type matrix
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use matrix::Matrix; |
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fn main() { |
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let matrix: Matrix<u32> = Matrix(vec![vec![3, 6], vec![8, 0]]); |
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println!("{:?}", matrix.col(0)); |
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println!("{:?}", matrix.row(1)); |
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let matrix_1: Matrix<u32> = Matrix(vec![vec![0, 1], vec![0, 0]]); |
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let matrix_2: Matrix<u32> = Matrix(vec![vec![0, 0], vec![1, 0]]); |
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let mult = matrix_1.clone() * matrix_2.clone(); |
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println!("{:?}", mult); |
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println!("{:?}", matrix_1.number_of_cols()); |
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println!("{:?}", matrix_2.number_of_rows()); |
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} |
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#[test] |
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fn get_row() { |
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let matrix: Matrix<u32> = Matrix(vec![vec![3, 6], vec![8, 0]]); |
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assert_eq!(vec![3u32, 6], matrix.row(0)); |
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assert_eq!(vec![8u32, 0], matrix.row(1)); |
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} |
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#[test] |
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fn get_col() { |
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let matrix: Matrix<u32> = Matrix(vec![vec![3, 6], vec![8, 0]]); |
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assert_eq!(matrix.col(0), vec![3u32, 8]); |
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assert_eq!(vec![6u32, 0], matrix.col(1)); |
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} |
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#[test] |
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fn matrix_multiplication() { |
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let matrix_1: Matrix<u32> = Matrix(vec![vec![0, 1], vec![0, 0]]); |
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let matrix_2: Matrix<u32> = Matrix(vec![vec![0, 0], vec![1, 0]]); |
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let expected: Matrix<u32> = Matrix(vec![vec![1, 0], vec![0, 0]]); |
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assert_eq!(matrix_1 * matrix_2, Some(expected)); |
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let matrix_1: Matrix<u32> = Matrix(vec![vec![0, 1], vec![0, 0]]); |
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let matrix_2: Matrix<u32> = Matrix(vec![vec![0, 0, 0], vec![1, 0, 0], vec![1, 1, 1]]); |
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assert_eq!(matrix_1 * matrix_2, None); |
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} |
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## matrix_mult |
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### Instructions |
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Implement the methods: |
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- `number_of_cols` which returns the number of columns of the matrix. |
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- `number_of_rows` which returns the number of rows of the matrix. |
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- `row(n)` which returns the `n`th row in the matrix. |
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- `col(n)` which returns the `n`th |
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Define the matrix multiplication by implementing the std::ops::Mul for the type matrix |
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### Expected Functions |
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```rust |
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impl Matrix<T> { |
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pub fn number_of_cols(&self) -> usize { |
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} |
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pub fn rows(&self) -> usize { |
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} |
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pub fn number_of_row(&self, n: usize) -> Vec<T> { |
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} |
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pub fn col(&self, n: usize) -> Vec<T> { |
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} |
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} |
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impl Mul for Matrix<T> { |
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} |
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``` |
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### Usage |
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Here is a program to test your function. |
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```rust |
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fn main() { |
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let matrix: Matrix<u32> = Matrix(vec![vec![3, 6], vec![8, 0]]); |
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println!("{:?}", matrix.col(0)); |
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println!("{:?}", matrix.row(1)); |
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let matrix_1: Matrix<u32> = Matrix(vec![vec![0, 1], vec![0, 0]]); |
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let matrix_2: Matrix<u32> = Matrix(vec![vec![0, 0], vec![1, 0]]); |
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let mult = matrix_1.clone() * matrix_2.clone(); |
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println!("{:?}", mult); |
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println!("{:?}", matrix_1.number_of_cols()); |
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println!("{:?}", matrix_2.number_of_rows()); |
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} |
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``` |
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And its output |
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```console |
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student@ubuntu:~/[[ROOT]]/test$ cargo run |
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[3, 8] |
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[8, 0] |
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Some(Matrix([[1, 0], [0, 0]])) |
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2 |
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2 |
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student@ubuntu:~/[[ROOT]]/test$ |
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``` |
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