def multifield(whichone):
x, y = symbols('x,y')
myPlot = plots.MyStandardPlot()
myPlot.ygraph(0.5 * exp(x * x / 2), [x, -1, 1], color=1)
myPlot.ygraph(0.25 * exp(-x * x / 2), [x, -1, 1], color=2)
myPlot.ygraph(x, [x, -1, 1], color=3)
myPlot.ygraph(-sqrt(0.25**2 - x**2), [x, -0.25, 0.25], color=4)
myPlot.ygraph(-sqrt(0.5**2 + x**2), [x, -0.9, 0.9], color=5)
myPlot.text(0.95, 0.70, 'A')
myPlot.text(0.88, 0.95, 'C')
myPlot.text(0.95, 0.22, 'B')
myPlot.text(0.92, -0.95, 'E')
myPlot.text(0.32, 0, 'D')
if whichone == 4:
myPlot.slopefield(x * y, [x, -1, 1], [y, -1, 1], samples=25)
elif whichone == 2:
myPlot.slopefield(-x * y, [x, -1, 1], [y, -1, 1], samples=25)
elif whichone == 3:
myPlot.slopefield(x - y + 1, [x, -1, 1], [y, -1, 1], samples=25)
elif whichone == 1:
myPlot.slopefield(-x / sqrt(0.5**2 + x**2), [x, -1, 1], [y, -1, 1],
samples=25)
myPlot.xticks([-1, 0, 1])
myPlot.yticks([-1, 0, 1])
myPlot.yaxis('left')
myPlot.xaxis('bottom')
# myPlot.show()
myPlot.saveas('slope' + str(whichone).zfill(2) + '.png')
myPlot.destroy()
import plots
from sympy import *
x = Symbol('x')
myPlot = plots.MyStandardPlot()
myPlot.yfillbetween([exp(-x**2), 0], (x, -0.5, 0.5), samples=400)
myPlot.ygraph(exp(-x**2), (x, -2, 2), color=-1)
myPlot.xticks([])
myPlot.yticks([])
myPlot.yaxis("left")
myPlot.mathlabel(1.2, 0.5, r'f(x)')
myPlot.mathlabel(-0.5, -0.14, 'c')
myPlot.mathlabel(0.5, -0.14, 'd')
myPlot.arrow(-0.95, -0.4, -0.9, 0)
myPlot.arrow(0.95, -0.4, 0.9, 0)
myPlot.text(0, -0.4, r'possible values of $X$')
myPlot.canvas.text(-2.4, 0.75, 'likelihood', fontsize=12, rotation=90)
#myPlot.mathlabel(0.0,1.2,r'y=\sqrt{1+x^2}')
myPlot.ylim(-0.5, 1.1)
#myPlot.resize()
myPlot.show()
myPlot.saveas('probability01.png')
myPlot.destroy()
quit()