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May 2, 2022 21:57
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| # by Matias I. Bofarull Oddo - 2022.05.02 | |
| # A small demo of sliders in matplotlib.pyplot | |
| from math import pi, cos, sin | |
| import matplotlib.pyplot as plt | |
| from matplotlib.widgets import Slider | |
| phi = (1 + (5 ** (1 / 2))) / 2 - 1 | |
| number_of_points = 1000 | |
| ################################### SPIRALS ################################### | |
| coord_x = [] | |
| coord_y = [] | |
| for i in range(number_of_points): | |
| distance = i / (number_of_points) | |
| angle = i * 2 * pi * phi | |
| coord_x.append(distance * cos(angle)) | |
| coord_y.append(distance * sin(angle)) | |
| fig = plt.figure(figsize=(10, 10)) | |
| (Plot,) = plt.plot(coord_x, coord_y, "o", markersize=4) | |
| plt.axis("off") | |
| margin = 0.1 | |
| edge = max([max(coord_x), max(coord_y)]) | |
| plt.xlim(-edge - (margin * edge), edge + (margin * edge)) | |
| plt.ylim(-edge - (margin * edge), edge + (margin * edge)) | |
| plt.gca().set_position([0, 0.01, 1, 1]) | |
| ax_slider = plt.axes([0.02, 0.015, 0.9, 0.01]) | |
| N_slider = Slider(ax_slider, "", 0.5, 1, valinit=phi, valstep=0.00001) | |
| def update(val): | |
| turn_fraction = N_slider.val | |
| coord_x = [] | |
| coord_y = [] | |
| for i in range(number_of_points): | |
| distance = i / (number_of_points) | |
| angle = i * 2 * pi * turn_fraction | |
| coord_x.append(distance * cos(angle)) | |
| coord_y.append(distance * sin(angle)) | |
| Plot.set_xdata(coord_x) | |
| Plot.set_ydata(coord_y) | |
| fig.canvas.draw_idle() | |
| N_slider.on_changed(update) | |
| plt.show() | |
| ################################### DENSITY ################################### | |
| coord_x = [] | |
| coord_y = [] | |
| for i in range(number_of_points): | |
| distance = i / (number_of_points) | |
| angle = i * 2 * pi * phi | |
| coord_x.append(distance * cos(angle)) | |
| coord_y.append(distance * sin(angle)) | |
| fig = plt.figure(figsize=(10, 10)) | |
| (Plot,) = plt.plot(coord_x, coord_y, "o", markersize=4) | |
| plt.axis("off") | |
| margin = 0.1 | |
| edge = max([max(coord_x), max(coord_y)]) | |
| plt.xlim(-edge - (margin * edge), edge + (margin * edge)) | |
| plt.ylim(-edge - (margin * edge), edge + (margin * edge)) | |
| plt.gca().set_position([0, 0.01, 1, 1]) | |
| ax_slider = plt.axes([0.02, 0.015, 0.9, 0.01]) | |
| N_slider = Slider(ax_slider, "", 0, 2, valinit=1, valstep=0.001) | |
| def update(val): | |
| turn_fraction = N_slider.val | |
| coord_x = [] | |
| coord_y = [] | |
| for i in range(number_of_points): | |
| distance = (i / (number_of_points)) ** turn_fraction | |
| angle = i * 2 * pi * phi | |
| coord_x.append(distance * cos(angle)) | |
| coord_y.append(distance * sin(angle)) | |
| Plot.set_xdata(coord_x) | |
| Plot.set_ydata(coord_y) | |
| fig.canvas.draw_idle() | |
| N_slider.on_changed(update) | |
| plt.show() | |
| ############################################################################### |
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