SageMath - Matrices and Matrix Operations with Sage Tutorial

[@mccpytutorials7955]

Time Stamps:
Intro/Vocabulary - 0:58
Making a matrix - 2:45
Making a vector - 7:10
Specifying a "ring" for your matrix - 8:43
Storing a matrix in a variable - 14:23
Matrix operations (e.g. addition, multiplication) - 18:11
Special matrices (ones_matrix(), zero_matrix(), identity_matrix(), random_matrix()) - 21:55
Accessing an element(s) from your matrix - 26:21

[@iloveyouall6393]

The video is really helpful, thanks

[@erikaleblanc9214]

Could you do a tutorial on vandermonde matrices for sage PLEASE!

[@mccpytutorials7955]

Thanks for the suggestion! Will look into doing that, in the meantime here are some resources for you: doc.sagemath.org/html/en/reference/matrices/sage/matrix/special.html#sage.matrix.special.vandermonde
gregorybard.com/books.html - click on the "Sage for Undergraduates" and go to Section 1.5.7 ("Vandermonde's Matrix").
Hope this helps!

[@setok3358]

I've got one question. How can I get the rows and columns of a matrix?

[@mccpytutorials7955]

Hi - good question. For a matrix "A" you can use A.nrows() for number of rows and A.ncols() for number of columns like so:
In: A = matrix(ZZ, 3, 2, [1, 2, 3, 4, 5, 6])
In: A.ncols()
Out: 2
In: A.nrows()
Out: 3
ask.sagemath.org/question/8020/matrix-size/; doc.sagemath.org/pdf/en/reference/matrices/matrices.pdf at 10-11.

[@setok3358]

@@mccpytutorials7955 thank you!

[@mccpytutorials7955]

My pleasure - good luck!

[@sameerjaved5986]

how can we implement inverse of a matrix in sagemath

[@letterborneVods]

You could try (matrix)^(-1)? But I'm not entirely sure.