def construct(self):
def get_example_quiz():
quiz = get_quiz(
"Define ``Brachistochrone'' ",
"Define ``Tautochrone'' ",
"Define ``Cycloid'' ",
)
rect = SurroundingRectangle(quiz, buff=0)
rect.set_fill(color=BLACK, opacity=1)
rect.set_stroke(width=0)
quiz.add_to_back(rect)
return quiz
highlight_color = WHITE
nb_students_x = 5
nb_students_y = 3
spacing_students_x = 2.0
spacing_students_y = 2.2
all_students = PiCreatureClass(width=nb_students_x,
height=nb_students_y) # VGroup()
student_points = []
grades = []
grades_count = []
hist_y_values = np.zeros(4)
for i in range(nb_students_x):
for j in range(nb_students_y):
x = i * spacing_students_x
y = j * spacing_students_y
#pi = PiCreature().scale(0.3)
#pi.move_to([x,y,0])
#all_students.add(pi)
all_students[i * nb_students_y + j].move_to([x, y, 0])
q1 = np.random.choice([True, False])
q2 = np.random.choice([True, False])
q3 = np.random.choice([True, False])
student_points.append([q1, q2, q3])
grade = q1 * 1 + q2 * 1 + q3 * 1
grades.append(grade)
hist_y_values[grade] += 1
# How many times has this grade already occured?
grade_count = grades.count(grade)
grades_count.append(grade_count)
all_students.move_to(ORIGIN)
self.pi_creatures = all_students
self.play(FadeIn(all_students))
all_quizzes = VGroup()
quiz = get_example_quiz().scale(0.2)
for pi in all_students:
quiz_copy = quiz.copy()
quiz_copy.next_to(pi, UP)
all_quizzes.add(quiz_copy)
master_quiz = get_example_quiz()
self.play(Write(master_quiz), run_time=2)
self.wait()
self.play(
ReplacementTransform(VGroup(master_quiz),
all_quizzes,
run_time=2,
lag_ratio=0.5))
self.wait(2)
grades_mob = VGroup()
for (pi, quiz, grade) in zip(all_students, all_quizzes, grades):
grade_mob = TexMobject(str(grade) + "/3")
grade_mob.move_to(quiz)
grades_mob.add(grade_mob)
self.remove(master_quiz)
self.wait()
self.play(FadeOut(all_quizzes), FadeIn(grades_mob))
# self.play(
# all_students[2:].fade, 0.8,
# grades_mob[2:].fade, 0.8
# )
students_points_mob = VGroup()
for (pi, quiz, points) in zip(all_students, all_quizzes,
student_points):
slot = get_slot_group(points, include_qs=False)
slot.scale(0.5).move_to(quiz)
students_points_mob.add(slot)
self.wait()
self.play(
#all_students.fade, 0,
FadeOut(grades_mob),
FadeIn(students_points_mob))
all_students.save_state()
students_points_mob.save_state()
self.wait()
randy = all_students[0]
morty = all_students[nb_students_y]
all_other_students = VGroup(*all_students)
all_other_students.remove(randy, morty)
randy_points = students_points_mob[0]
morty_points = students_points_mob[nb_students_y]
all_other_points = VGroup(*students_points_mob)
all_other_points.remove(randy_points, morty_points)
self.play(
all_other_students.fade,
0.8,
all_other_points.fade,
0.8,
)
self.wait()
scale = 1.5
self.play(randy_points.scale, scale)
self.play(randy_points.scale, 1.0 / scale, morty_points.scale, scale)
self.play(morty_points.scale, 1.0 / scale)
self.wait()
self.play(
all_students.restore,
students_points_mob.restore,
)
self.wait()
anims = []
for points in students_points_mob:
anims.append(points.scale)
anims.append(scale)
self.play(*anims)
self.wait()
anims = []
for points in students_points_mob:
anims.append(points.scale)
anims.append(1.0 / scale)
self.play(*anims)
anims = []
anchor_point = 3 * DOWN + 1 * LEFT
for (pi, grade, grades_count) in zip(all_students, grades,
grades_count):
anims.append(pi.move_to)
anims.append(anchor_point + grade * RIGHT + grades_count * UP)
anims.append(FadeOut(students_points_mob))
self.wait()
self.play(*anims)
grade_labels = VGroup()
for i in range(4):
grade_label = Integer(i, color=highlight_color)
grade_label.move_to(i * RIGHT)
grade_labels.add(grade_label)
grade_labels.next_to(all_students, DOWN)
out_of_label = TextMobject("out of 3", color=highlight_color)
out_of_label.next_to(grade_labels, RIGHT, buff=MED_LARGE_BUFF)
grade_labels.add(out_of_label)
self.wait()
self.play(Write(grade_labels))
grade_hist = Histogram(np.ones(4),
hist_y_values,
mode="widths",
x_labels="none",
y_label_position="center",
bar_stroke_width=0,
outline_stroke_width=5)
grade_hist.move_to(all_students)
self.wait()
self.play(FadeIn(grade_hist), FadeOut(all_students))
nb_students_label = TextMobject("\# of students",
color=highlight_color)
nb_students_label.move_to(5 * RIGHT + 1 * UP)
arrows = VGroup(*[
Arrow(nb_students_label.get_left(),
grade_hist.bars[i].get_center(),
color=highlight_color) for i in range(4)
])
self.wait()
self.play(Write(nb_students_label), LaggedStartMap(GrowArrow, arrows))
percentage_label = TextMobject("\% of students", color=highlight_color)
percentage_label.move_to(nb_students_label)
percentages = hist_y_values / (nb_students_x * nb_students_y) * 100
anims = []
for (label, percentage) in zip(grade_hist.y_labels_group, percentages):
new_label = DecimalNumber(percentage,
num_decimal_places=1,
unit="\%",
color=highlight_color)
new_label.scale(0.7)
new_label.move_to(label)
anims.append(Transform(label, new_label))
anims.append(ReplacementTransform(nb_students_label, percentage_label))
self.wait()
self.play(*anims)
self.remove(all_quizzes)
# put small copy of class in corner
for (i, pi) in enumerate(all_students):
x = i % 5
y = i / 5
pi.move_to(x * RIGHT + y * UP)
all_students.scale(0.8)
all_students.to_corner(DOWN + LEFT)
self.wait()
self.play(FadeIn(all_students))
prob_label = TextMobject("probability", color=highlight_color)
prob_label.move_to(percentage_label)
self.wait()
self.play(
all_students[8].set_color,
MAROON_E,
#all_students[:8].fade, 0.6,
#all_students[9:].fade, 0.6,
ReplacementTransform(percentage_label, prob_label))
self.wait()
self.play(FadeOut(prob_label), FadeOut(arrows))
flash_hist = FlashThroughHistogram(grade_hist,
direction="vertical",
mode="random",
cell_opacity=0.5,
run_time=5,
rate_func=linear)
flash_class = FlashThroughClass(all_students,
mode="random",
highlight_color=MAROON_E,
run_time=5,
rate_func=linear)
self.wait()
for i in range(3):
self.play(flash_hist, flash_class)
self.remove(flash_hist.prototype_cell)
def construct(self):
def get_example_quiz():
quiz = get_quiz(
"Define ``Brachistochrone'' ",
"Define ``Tautochrone'' ",
"Define ``Cycloid'' ",
)
rect = SurroundingRectangle(quiz, buff = 0)
rect.set_fill(color = BLACK, opacity = 1)
rect.set_stroke(width = 0)
quiz.add_to_back(rect)
return quiz
highlight_color = WHITE
nb_students_x = 5
nb_students_y = 3
spacing_students_x = 2.0
spacing_students_y = 2.2
all_students = PiCreatureClass(
width = nb_students_x, height = nb_students_y)# VGroup()
student_points = []
grades = []
grades_count = []
hist_y_values = np.zeros(4)
for i in range(nb_students_x):
for j in range(nb_students_y):
x = i * spacing_students_x
y = j * spacing_students_y
#pi = PiCreature().scale(0.3)
#pi.move_to([x,y,0])
#all_students.add(pi)
all_students[i*nb_students_y + j].move_to([x,y,0])
q1 = np.random.choice([True, False])
q2 = np.random.choice([True, False])
q3 = np.random.choice([True, False])
student_points.append([q1, q2, q3])
grade = q1*1+q2*1+q3*1
grades.append(grade)
hist_y_values[grade] += 1
# How many times has this grade already occured?
grade_count = grades.count(grade)
grades_count.append(grade_count)
all_students.move_to(ORIGIN)
self.pi_creatures = all_students
self.play(FadeIn(all_students))
all_quizzes = VGroup()
quiz = get_example_quiz().scale(0.2)
for pi in all_students:
quiz_copy = quiz.copy()
quiz_copy.next_to(pi, UP)
all_quizzes.add(quiz_copy)
master_quiz = get_example_quiz()
self.play(Write(master_quiz), run_time = 2)
self.wait()
self.play(ReplacementTransform(
VGroup(master_quiz), all_quizzes,
run_time=2,
lag_ratio=0.5
))
self.wait(2)
grades_mob = VGroup()
for (pi, quiz, grade) in zip(all_students, all_quizzes, grades):
grade_mob = TexMobject(str(grade) + "/3")
grade_mob.move_to(quiz)
grades_mob.add(grade_mob)
self.remove(master_quiz)
self.wait()
self.play(
FadeOut(all_quizzes),
FadeIn(grades_mob)
)
# self.play(
# all_students[2:].fade, 0.8,
# grades_mob[2:].fade, 0.8
# )
students_points_mob = VGroup()
for (pi, quiz, points) in zip(all_students, all_quizzes, student_points):
slot = get_slot_group(points, include_qs = False)
slot.scale(0.5).move_to(quiz)
students_points_mob.add(slot)
self.wait()
self.play(
#all_students.fade, 0,
FadeOut(grades_mob),
FadeIn(students_points_mob)
)
all_students.save_state()
students_points_mob.save_state()
self.wait()
randy = all_students[0]
morty = all_students[nb_students_y]
all_other_students = VGroup(*all_students)
all_other_students.remove(randy, morty)
randy_points = students_points_mob[0]
morty_points = students_points_mob[nb_students_y]
all_other_points = VGroup(*students_points_mob)
all_other_points.remove(randy_points, morty_points)
self.play(
all_other_students.fade, 0.8,
all_other_points.fade, 0.8,
)
self.wait()
scale = 1.5
self.play(randy_points.scale,scale)
self.play(randy_points.scale,1.0/scale, morty_points.scale,scale)
self.play(morty_points.scale,1.0/scale)
self.wait()
self.play(
all_students.restore,
students_points_mob.restore,
)
self.wait()
anims = []
for points in students_points_mob:
anims.append(points.scale)
anims.append(scale)
self.play(*anims)
self.wait()
anims = []
for points in students_points_mob:
anims.append(points.scale)
anims.append(1.0/scale)
self.play(*anims)
anims = []
anchor_point = 3 * DOWN + 1 * LEFT
for (pi, grade, grades_count) in zip(all_students, grades, grades_count):
anims.append(pi.move_to)
anims.append(anchor_point + grade * RIGHT + grades_count * UP)
anims.append(FadeOut(students_points_mob))
self.wait()
self.play(*anims)
grade_labels = VGroup()
for i in range(4):
grade_label = Integer(i, color = highlight_color)
grade_label.move_to(i * RIGHT)
grade_labels.add(grade_label)
grade_labels.next_to(all_students, DOWN)
out_of_label = TextMobject("out of 3", color = highlight_color)
out_of_label.next_to(grade_labels, RIGHT, buff = MED_LARGE_BUFF)
grade_labels.add(out_of_label)
self.wait()
self.play(Write(grade_labels))
grade_hist = Histogram(
np.ones(4),
hist_y_values,
mode = "widths",
x_labels = "none",
y_label_position = "center",
bar_stroke_width = 0,
outline_stroke_width = 5
)
grade_hist.move_to(all_students)
self.wait()
self.play(
FadeIn(grade_hist),
FadeOut(all_students)
)
nb_students_label = TextMobject("\# of students", color = highlight_color)
nb_students_label.move_to(5 * RIGHT + 1 * UP)
arrows = VGroup(*[
Arrow(nb_students_label.get_left(), grade_hist.bars[i].get_center(),
color = highlight_color)
for i in range(4)
])
self.wait()
self.play(Write(nb_students_label), LaggedStartMap(GrowArrow,arrows))
percentage_label = TextMobject("\% of students", color = highlight_color)
percentage_label.move_to(nb_students_label)
percentages = hist_y_values / (nb_students_x * nb_students_y) * 100
anims = []
for (label, percentage) in zip(grade_hist.y_labels_group, percentages):
new_label = DecimalNumber(percentage,
num_decimal_places = 1,
unit = "\%",
color = highlight_color
)
new_label.scale(0.7)
new_label.move_to(label)
anims.append(Transform(label, new_label))
anims.append(ReplacementTransform(nb_students_label, percentage_label))
self.wait()
self.play(*anims)
self.remove(all_quizzes)
# put small copy of class in corner
for (i,pi) in enumerate(all_students):
x = i % 5
y = i / 5
pi.move_to(x * RIGHT + y * UP)
all_students.scale(0.8)
all_students.to_corner(DOWN + LEFT)
self.wait()
self.play(FadeIn(all_students))
prob_label = TextMobject("probability", color = highlight_color)
prob_label.move_to(percentage_label)
self.wait()
self.play(
all_students[8].set_color, MAROON_E,
#all_students[:8].fade, 0.6,
#all_students[9:].fade, 0.6,
ReplacementTransform(percentage_label, prob_label)
)
self.wait()
self.play(
FadeOut(prob_label),
FadeOut(arrows)
)
flash_hist = FlashThroughHistogram(
grade_hist,
direction = "vertical",
mode = "random",
cell_opacity = 0.5,
run_time = 5,
rate_func = linear
)
flash_class = FlashThroughClass(
all_students,
mode = "random",
highlight_color = MAROON_E,
run_time = 5,
rate_func = linear
)
self.wait()
for i in range(3):
self.play(flash_hist, flash_class)
self.remove(flash_hist.prototype_cell)