I've started to practice rust. I've run the program and got:
VecStorage { data: [1.0, 88.0, 87.0, 1.0, 70.0, 77.0, 1.0, 80.0, 79.0, 1.0, 82.0, 85.0, 1.0, 90.0, 97.0, 1.0, 100.0, 98.0], nrows: Dynamic { value: 6 }, ncols: Dynamic { value: 3 } }
VecStorage { data: [1.0, 1.0, 1.0, 88.0, 80.0, 90.0, 87.0, 79.0, 97.0, 1.0, 1.0, 1.0, 70.0, 82.0, 100.0, 77.0, 85.0, 98.0], nrows: Dynamic { value: 3 }, ncols: Dynamic { value: 6 } }
main.rs:
let matrix = vec![1.0,88.0,87.0,1.0,70.0,77.0,1.0,80.0,79.0,1.0,82.0,85.0,1.0,90.0,97.0,1.0,100.0,98.0];
let matrix = DMatrix::from_vec(6,3,matrix);
println!("{:?}",matrix);
println!("{:?}",matrix.transpose());
However transpose matrix is different(from the correct transpose), any ideas why?
According to the documentation, the matrix is filled from vector in column-major order. I suspect from the provided data that you're expecting a row-major one (with a first column of the original matrix holding only 1s).
We can see this if we use Display formatting instead of Debug - the output in this case is the following:
┌ ┐
│ 1 1 1 │
│ 88 80 90 │
│ 87 79 97 │
│ 1 1 1 │
│ 70 82 100 │
│ 77 85 98 │
└ ┘
┌ ┐
│ 1 88 87 1 70 77 │
│ 1 80 79 1 82 85 │
│ 1 90 97 1 100 98 │
└ ┘