manim.mobject.matrix

Mobjects representing matrices.

Examples

Example: MatrixExamples

../_images/MatrixExamples-1.png
from manim import *

class MatrixExamples(Scene):
    def construct(self):
        m0 = Matrix([["\\pi", 0], [-1, 1]])
        m1 = IntegerMatrix([[1.5, 0.], [12, -1.3]],
            left_bracket="(",
            right_bracket=")")
        m2 = DecimalMatrix(
            [[3.456, 2.122], [33.2244, 12.33]],
            element_to_mobject_config={"num_decimal_places": 2},
            left_bracket="\\{",
            right_bracket="\\}")
        m3 = MobjectMatrix(
            [[Circle().scale(0.3), Square().scale(0.3)],
            [MathTex("\\pi").scale(2), Star().scale(0.3)]],
            left_bracket="\\langle",
            right_bracket="\\rangle")
        g = Group(m0, m1, m2, m3).arrange_in_grid(buff=2)
        self.add(g)

Classes

DecimalMatrix

A mobject that displays a matrix with decimal entries on the screen.

IntegerMatrix

A mobject that displays a matrix with integer entries on the screen.

Matrix

A mobject that displays a matrix on the screen.

MobjectMatrix

A mobject that displays a matrix of mobject entries on the screen.

Functions

get_det_text(matrix, determinant=None, background_rect=False, initial_scale_factor=2)[source]

Helper function to create determinant.

Parameters
  • matrix (Matrix) – The matrix whose determinant is to be created

  • determinant (int|str) – The value of the determinant of the matrix

  • background_rect (bool) – The background rectangle

  • initial_scale_factor (float) – The scale of the text det w.r.t the matrix

Returns

A VGroup containing the determinant

Return type

VGroup

Examples

Example: DeterminantOfAMatrix

../_images/DeterminantOfAMatrix-1.png
from manim import *

class DeterminantOfAMatrix(Scene):
    def construct(self):
        matrix = Matrix([
            [2, 0],
            [-1, 1]
        ])

        # scaling down the `det` string
        det = get_det_text(matrix,
                    determinant=3,
                    initial_scale_factor=1)

        # must add the matrix
        self.add(matrix)
        self.add(det)
matrix_to_mobject(matrix)[source]
matrix_to_tex_string(matrix)[source]