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import numpy | |
import pylab | |
from pylab import * | |
from matplotlib.widgets import Slider, Button, RadioButtons | |
# default 2d transformation matrix values | |
x1_def, x2_def, y1_def, y2_def = 1,0,0,1 | |
ax = subplot(111) | |
subplots_adjust(bottom=0.25) | |
# Stretch X and Y | |
A = numpy.matrix([[x1_def,x2_def],[y1_def,y2_def]]) | |
x = numpy.matrix([[1, 2, 3, 4, 1, 1, 1, 4, 4, 4, 2, 2, 2, 3, 3, 3],[1, 2, 3, 4, 2, 3, 4, 1, 2, 3, 1, 3, 4, 1, 2, 4]]) | |
y = A*x | |
l1, = pylab.plot(x[0].tolist()[0], x[1].tolist()[0], "*"); | |
l2, = pylab.plot(y[0].tolist()[0], y[1].tolist()[0], "o"); | |
pylab.ylim(-30,30) | |
pylab.xlim(-30,30) | |
slider_axis_bg_color = 'lightgoldenrodyellow' | |
axes_x1 = axes([0.15, 0.16, 0.65, 0.03], axisbg=slider_axis_bg_color) | |
x1valslider = Slider(axes_x1, 'x1', -15.0, 20.0, valinit=x1_def) | |
axes_x2 = axes([0.15, 0.11, 0.65, 0.03], axisbg=slider_axis_bg_color) | |
x2valslider = Slider(axes_x2, 'x2', -15.0, 20.0, valinit=x2_def) | |
axes_y1 = axes([0.15, 0.06, 0.65, 0.03], axisbg=slider_axis_bg_color) | |
y1valslider = Slider(axes_y1, 'y1', -15.0, 20.0, valinit=y1_def) | |
axes_y2 = axes([0.15, 0.01, 0.65, 0.03], axisbg=slider_axis_bg_color) | |
y2valslider = Slider(axes_y2, 'y2', -15.0, 20.0, valinit=y2_def) | |
resetax = axes([0.90, 0.01, 0.1, 0.04]) | |
button = Button(resetax, 'Reset', color=slider_axis_bg_color, hovercolor='0.975') | |
pylab.show() | |
def reset(event): | |
A = numpy.matrix([[x1_def,x2_def],[y1_def,y2_def]]) | |
y = A*x | |
l2.set_xdata(y[0].tolist()[0]) | |
l2.set_ydata(y[1].tolist()[0]) | |
x1valslider.set_val(A[0,0]) | |
x2valslider.set_val(A[0,1]) | |
y1valslider.set_val(A[1,0]) | |
y2valslider.set_val(A[1,1]) | |
draw() | |
button.on_clicked(reset) | |
def update(val): | |
A[1,0] = y1valslider.val | |
A[1,1] = y2valslider.val | |
A[0,0] = x1valslider.val | |
A[0,1] = x2valslider.val | |
y = A*x | |
l2.set_xdata(y[0].tolist()[0]) | |
l2.set_ydata(y[1].tolist()[0]) | |
draw() | |
y1valslider.on_changed(update) | |
y2valslider.on_changed(update) | |
x1valslider.on_changed(update) | |
x2valslider.on_changed(update) |
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