def construct(self):
matrix = Matrix([list("abc"), list("def"), list("ghi")])
matrix.highlight_columns(X_COLOR, Y_COLOR, Z_COLOR)
m1 = Matrix([["e", "f"], ["h", "i"]])
m1.highlight_columns(Y_COLOR, Z_COLOR)
m2 = Matrix([["d", "f"], ["g", "i"]])
m2.highlight_columns(X_COLOR, Z_COLOR)
m3 = Matrix([["d", "e"], ["g", "h"]])
m3.highlight_columns(X_COLOR, Y_COLOR)
for m in matrix, m1, m2, m3:
m.add(get_det_text(m))
a, b, c = matrix.get_entries().split()[:3]
parts = it.starmap(VMobject, [
[matrix],
[TexMobject("="), a.copy(), m1],
[TexMobject("-"), b.copy(), m2],
[TexMobject("+"), c.copy(), m3],
])
parts = list(parts)
for part in parts:
part.arrange_submobjects(RIGHT, buff=0.2)
parts[1].next_to(parts[0], RIGHT)
parts[2].next_to(parts[1], DOWN, aligned_edge=LEFT)
parts[3].next_to(parts[2], DOWN, aligned_edge=LEFT)
everyone = VMobject(*parts)
everyone.center().to_edge(UP)
for part in parts:
self.play(Write(part))
self.wait(2)
def construct(self):
lhs = TexMobject(["\\text{det}(", "M_1", "M_2", ")"])
det, m1, m2, rp = lhs.split()
m1.highlight(TEAL)
m2.highlight(PINK)
rhs = TexMobject(["=\\text{det}(", "M_1", ")\\text{det}(", "M_2", ")"])
rhs.split()[1].highlight(TEAL)
rhs.split()[3].highlight(PINK)
rhs.next_to(lhs, RIGHT)
formula = VMobject(lhs, rhs)
formula.center()
title = TextMobject("Explain in one sentence")
title.highlight(YELLOW)
title.next_to(formula, UP, buff=0.5)
self.play(Write(m1))
self.play(Write(m2))
self.wait()
self.play(Write(det), Write(rp))
self.play(Write(rhs))
self.wait(2)
self.play(Write(title))
self.wait(2)
def construct(self):
matrix = Matrix([list("abc"), list("def"), list("ghi")])
matrix.highlight_columns(X_COLOR, Y_COLOR, Z_COLOR)
m1 = Matrix([["e", "f"], ["h", "i"]])
m1.highlight_columns(Y_COLOR, Z_COLOR)
m2 = Matrix([["d", "f"], ["g", "i"]])
m2.highlight_columns(X_COLOR, Z_COLOR)
m3 = Matrix([["d", "e"], ["g", "h"]])
m3.highlight_columns(X_COLOR, Y_COLOR)
for m in matrix, m1, m2, m3:
m.add(get_det_text(m))
a, b, c = matrix.get_entries().split()[:3]
parts = it.starmap(VMobject, [
[matrix],
[TexMobject("="), a.copy(), m1],
[TexMobject("-"), b.copy(), m2],
[TexMobject("+"), c.copy(), m3],
])
parts = list(parts)
for part in parts:
part.arrange_submobjects(RIGHT, buff = 0.2)
parts[1].next_to(parts[0], RIGHT)
parts[2].next_to(parts[1], DOWN, aligned_edge = LEFT)
parts[3].next_to(parts[2], DOWN, aligned_edge = LEFT)
everyone = VMobject(*parts)
everyone.center().to_edge(UP)
for part in parts:
self.play(Write(part))
self.dither(2)
def construct(self):
words = map(TextMobject, [
"Just brushing up",
"Has yet to take the course",
"Supplementing course concurrently",
])
students = VMobject(*[
Randolph(color = c)
for c in BLUE_D, BLUE_C, BLUE_E
])
modes = ["pondering", "speaking_looking_left", "sassy"]
students.arrange_submobjects(RIGHT)
students.scale(0.8)
students.center().to_edge(DOWN)
last_word, last_arrow = None, None
for word, student, mode in zip(words, students.split(), modes):
word.shift(2*UP)
arrow = Arrow(word, student)
if last_word:
word_anim = Transform(last_word, word)
arrow_anim = Transform(last_arrow, arrow)
else:
word_anim = Write(word, run_time = 1)
arrow_anim = ShowCreation(arrow, submobject_mode = "one_at_a_time")
last_word = word
last_arrow = arrow
self.play(
word_anim, arrow_anim,
ApplyMethod(student.change_mode, mode)
)
self.play(Blink(student))
self.dither()
self.dither()
def handle_mathy(self, creatures):
self.fade_all_but(creatures, 2)
physy, compy, mathy = creatures
v_color = YELLOW
w_color = BLUE
sum_color = GREEN
v_arrow = Vector([1, 1])
w_arrow = Vector([2, 1])
w_arrow.shift(v_arrow.get_end())
sum_arrow = Vector(w_arrow.get_end())
arrows = VMobject(v_arrow, w_arrow, sum_arrow)
arrows.scale(0.7)
arrows.to_edge(LEFT, buff = 2)
v_array = matrix_to_mobject([3, -5])
w_array = matrix_to_mobject([2, 1])
sum_array = matrix_to_mobject(["3+2", "-5+1"])
arrays = VMobject(
v_array, TexMobject("+"), w_array, TexMobject("="), sum_array
)
arrays.arrange_submobjects(RIGHT)
arrays.scale(0.75)
arrays.to_edge(RIGHT).shift(UP)
v_sym = TexMobject("\\vec{\\textbf{v}}")
w_sym = TexMobject("\\vec{\\textbf{w}}")
syms = VMobject(v_sym, TexMobject("+"), w_sym)
syms.arrange_submobjects(RIGHT)
syms.center().shift(2*UP)
statement = TextMobject("We'll ignore him \\\\ for now")
statement.highlight(PINK)
statement.scale_to_fit_width(arrays.get_width())
statement.next_to(arrays, DOWN, buff = 1.5)
circle = Circle()
circle.shift(syms.get_bottom())
VMobject(v_arrow, v_array, v_sym).highlight(v_color)
VMobject(w_arrow, w_array, w_sym).highlight(w_color)
VMobject(sum_arrow, sum_array).highlight(sum_color)
self.play(
Write(syms), Write(arrays),
ShowCreation(arrows, submobject_mode = "one_at_a_time"),
ApplyMethod(mathy.change_mode, "pondering"),
run_time = 2
)
self.play(Blink(mathy))
self.add_scaling(arrows, syms, arrays)
self.play(Write(statement))
self.play(ApplyMethod(mathy.change_mode, "sad"))
self.wait()
self.play(
ShowCreation(circle),
ApplyMethod(mathy.change_mode, "plain")
)
self.wait()
def handle_mathy(self, creatures):
self.fade_all_but(creatures, 2)
physy, compy, mathy = creatures
v_color = YELLOW
w_color = BLUE
sum_color = GREEN
v_arrow = Vector([1, 1])
w_arrow = Vector([2, 1])
w_arrow.shift(v_arrow.get_end())
sum_arrow = Vector(w_arrow.get_end())
arrows = VMobject(v_arrow, w_arrow, sum_arrow)
arrows.scale(0.7)
arrows.to_edge(LEFT, buff = 2)
v_array = matrix_to_mobject([3, -5])
w_array = matrix_to_mobject([2, 1])
sum_array = matrix_to_mobject(["3+2", "-5+1"])
arrays = VMobject(
v_array, TexMobject("+"), w_array, TexMobject("="), sum_array
)
arrays.arrange_submobjects(RIGHT)
arrays.scale(0.75)
arrays.to_edge(RIGHT).shift(UP)
v_sym = TexMobject("\\vec{\\textbf{v}}")
w_sym = TexMobject("\\vec{\\textbf{w}}")
syms = VMobject(v_sym, TexMobject("+"), w_sym)
syms.arrange_submobjects(RIGHT)
syms.center().shift(2*UP)
statement = TextMobject("We'll ignore him \\\\ for now")
statement.highlight(PINK)
statement.scale_to_fit_width(arrays.get_width())
statement.next_to(arrays, DOWN, buff = 1.5)
circle = Circle()
circle.shift(syms.get_bottom())
VMobject(v_arrow, v_array, v_sym).highlight(v_color)
VMobject(w_arrow, w_array, w_sym).highlight(w_color)
VMobject(sum_arrow, sum_array).highlight(sum_color)
self.play(
Write(syms), Write(arrays),
ShowCreation(arrows, submobject_mode = "one_at_a_time"),
ApplyMethod(mathy.change_mode, "pondering"),
run_time = 2
)
self.play(Blink(mathy))
self.add_scaling(arrows, syms, arrays)
self.play(Write(statement))
self.play(ApplyMethod(mathy.change_mode, "sad"))
self.dither()
self.play(
ShowCreation(circle),
ApplyMethod(mathy.change_mode, "plain")
)
self.dither()
def construct(self):
lhs = TexMobject([
"\\text{det}(",
"M_1",
"M_2",
")"
])
det, m1, m2, rp = lhs.split()
m1.highlight(TEAL)
m2.highlight(PINK)
rhs = TexMobject([
"=\\text{det}(",
"M_1",
")\\text{det}(",
"M_2",
")"
])
rhs.split()[1].highlight(TEAL)
rhs.split()[3].highlight(PINK)
rhs.next_to(lhs, RIGHT)
formula = VMobject(lhs, rhs)
formula.center()
title = TextMobject("Explain in one sentence")
title.highlight(YELLOW)
title.next_to(formula, UP, buff = 0.5)
self.play(Write(m1))
self.play(Write(m2))
self.dither()
self.play(Write(det), Write(rp))
self.play(Write(rhs))
self.dither(2)
self.play(Write(title))
self.dither(2)
