generated from mwc/lab_scatter
6830422dcc
At first, this program was pretty tricky, but working through it step by step helped me understand it. The top-down plan from Checkpoint 1 made it easier to see how drawing the axes, ticks, and points all fit together. It was difficult to understand the different parts of the complex program but the top-down plan and outside resources helped me achieve my goal. By the end, I understood how the pieces worked as a whole, and it gave me ideas for other programs like making line graphs or bar charts in the same way.
87 lines
2.1 KiB
Python
87 lines
2.1 KiB
Python
# scatterplot.py
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# ------------
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# By MWC Contributors
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# Uses lots of helper functions in other modules to draw a scatter plot.
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from turtle import *
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from superturtle.movement import no_delay
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import constants
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from generate_data import generate_data
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from ticks import get_tick_values
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from plotting import (
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prepare_screen,
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draw_x_axis,
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draw_y_axis,
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draw_x_tick,
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draw_y_tick,
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draw_point,
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)
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from transform import (
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maximum,
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minimum,
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bounds,
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clamp,
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ratio,
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scale,
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get_x_values,
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get_y_values,
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)
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import random
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def draw_scatterplot(data, size=5, color="black"):
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# this draws a scatter plot, showing the data
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prepare_screen()
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draw_axes(data)
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draw_points(data, color, size)
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def draw_axes(data):
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#this draws the scatter plot's axes
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# X-Axis
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draw_x_axis()
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x_values = get_x_values(data)
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xmin, xmax = bounds(x_values)
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x_ticks = get_tick_values(xmin, xmax)
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for tick in x_ticks:
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# this scales tick position to screen coordinates
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screen_x = scale(tick, xmin, xmax, 0, constants.PLOT_WIDTH)
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draw_x_tick(screen_x, tick)
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# Y-Axis
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draw_y_axis()
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y_values = get_y_values(data)
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ymin, ymax = bounds(y_values)
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y_ticks = get_tick_values(ymin, ymax)
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for tick in y_ticks:
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# this scales tick position to screen coordinates
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screen_y = scale(tick, ymin, ymax, 0, constants.PLOT_HEIGHT)
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draw_y_tick(screen_y, tick)
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def draw_points(data, color, size):
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#this Draws the scatter plot's points
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x_values = get_x_values(data)
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y_values = get_y_values(data)
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xmin, xmax = bounds(x_values)
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ymin, ymax = bounds(y_values)
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for x, y in data:
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screen_x = scale(x, xmin, xmax, 0, constants.PLOT_WIDTH)
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screen_y = scale(y, ymin, ymax, 0, constants.PLOT_HEIGHT)
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draw_point(screen_x, screen_y, color, size)
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# MAIN PROGRAM (runs the plot)
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with no_delay():
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# Generate random test data
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data = [(random.randint(10, 500), random.randint(5, 400)) for _ in range(50)]
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draw_scatterplot(data, size=5, color="blue")
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hideturtle()
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done()
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