#
# Polt Sine Wave...
#

#
# Replace a character in-place...
#
# s = 'foobar'
# s = s[:3] + 'x' + s[4:]	# replace the 3rd char with 'x'
# print s

import math as m

y_0 = 20
y_scale = 10

x_resolution = 10
deltaAngle = m.pi/x_resolution

x_ticks = 41
x_step = 1

#
# Plot (1) - Sine
#
hbar = '-' * y_0 + '+' + '-' * y_0
# print '-' * y_0, '+', '-' * y_0
print hbar
for x in range(0,x_ticks,x_step):
    bar = ' ' * 2 * y_0

    sin = m.sin(deltaAngle * x)
    y = int(sin * y_scale)	# # y = sin * y_scale
    bar = bar[:y_0+y]+'s'+bar[y_0+y+1:]

#    cos = m.cos(deltaAngle * x)
#    y = int(cos * y_scale)	# # y = sin * y_scale
#    bar = bar[:y_0+y]+'c'+bar[y_0+y+1:]

    bar = bar[:y_0+0]+'|'+bar[y_0+0+1:]
    print bar

#
# Plot (2) - Cosine
#
hbar = '-' * y_0 + '+' + '-' * y_0
# print '-' * y_0, '+', '-' * y_0
print hbar
for x in range(0,x_ticks,x_step):
    bar = ' ' * 2 * y_0

#    sin = m.sin(deltaAngle * x)
#    y = int(sin * y_scale)	# # y = sin * y_scale
#    bar = bar[:y_0+y]+'s'+bar[y_0+y+1:]

    cos = m.cos(deltaAngle * x)
    y = int(cos * y_scale)	# # y = sin * y_scale
    bar = bar[:y_0+y]+'c'+bar[y_0+y+1:]

    bar = bar[:y_0+0]+'|'+bar[y_0+0+1:]
    print bar

#
# Plot (3) - Sin + Cos
#
hbar = '-' * y_0 + '+' + '-' * y_0
# print '-' * y_0, '+', '-' * y_0
print hbar
for x in range(0,x_ticks,x_step):
    bar = ' ' * 2 * y_0

    sin = m.sin(deltaAngle * x)
    y = int(sin * y_scale)	# # y = sin * y_scale
    bar = bar[:y_0+y]+'s'+bar[y_0+y+1:]

    cos = m.cos(deltaAngle * x)
    y = int(cos * y_scale)	# # y = sin * y_scale
    bar = bar[:y_0+y]+'c'+bar[y_0+y+1:]

    bar = bar[:y_0+0]+'|'+bar[y_0+0+1:]
    print bar

#
# Plot (4) - Sine
#
print '-' * y_0, '+', '-' * y_0
for x in range(0,x_ticks,x_step):
    sin = m.sin(deltaAngle * x)
    y = int(sin * y_scale)	# # y = sin * y_scale

    #+ print ' ' * y_0, '*' * (y+y_0)
    #+ print ' ' * (y+y_0), '$'
    #+ print "sin(",x,"/",x_resolution," pi) =", sin, y

    if ( y > 0 ):
	print ' ' * y_0, '|', ' ' * (y-1), '@'
    elif y == 0:
	print ' ' * y_0, ':'
    else:
	print ' ' * (y_0+y-2), '@', ' ' * (-y-1), '|'

print
#
# Plot (5) - Sine
#
print '-' * y_0, '+', '-' * y_0
for x in range(0,x_ticks,x_step):
    sin = m.sin(deltaAngle * x)
    y = int(sin * y_scale)	# # y = sin * y_scale
    if ( y > 0 ):
	print ' ' * y_0, '|', '@' * y
    else:
	print ' ' * (y_0+y-1), '@' * (-y), '|'

# y_axis = "                         "
    # y_axis[y] = '*'	# CANNOT change string member
    # print y_axis