def main():
n = int(sys.argv[1])
p = float(sys.argv[2])
trials = int(sys.argv[3])
histogram = Histogram(n + 1)
for t in range(trials):
heads = stdrandom.binomial(n, p)
histogram.addDataPoint(heads)
stddraw.setCanvasSize(500, 200)
histogram.draw()
stddraw.show()
def fade(file1, file2):
print('can support extension:', pygame.image.get_extended())
source = Picture(file1)
target = Picture(file2)
n = 5
width = source.width()
height = source.height()
stddraw.setCanvasSize(width, height)
pic = Picture(width, height)
for t in range(n + 1):
for col in range(width):
for row in range(height):
c0 = source.get(col, row)
cn = target.get(col, row)
alpha = 1.0 * t / n
pic.set(col, row, blend(c0, cn, alpha))
stddraw.picture(pic)
stddraw.show(2)
stddraw.show()
result = stdarray.create1D(len(index), 0)
for i in range(n):
sum = dice_1[stdrandom.uniformInt(0, 5)] + dice_2[stdrandom.uniformInt(
0, 5)]
result[sum] += 1
return result
def run(n):
dice_1 = [1, 3, 4, 5, 6, 8]
dice_2 = [1, 2, 2, 3, 3, 4]
dice_s = [1, 2, 3, 4, 5, 6]
result1 = dice(dice_1, dice_2, n)
result2 = dice(dice_s, dice_s, n)
print(result1, result2)
stddraw.setYscale(0, 1.1 * max(max(result1), max(result2)))
stdstats.plotLines(result1)
stdstats.plotBars(result2)
stddraw.show(50)
stddraw.setCanvasSize(1000, 400)
for n in range(50, 200):
stddraw.clear()
run(n)
import sys
from stdpackage import stddraw,stdio
from stdpackage.color import Color
from stdpackage.picture import Picture
def luminance(c):
red = c.getRed()
green = c.getGreen()
blue = c.getBlue()
return .299*red + .587*green + .144*blue
def toGray(c):
y = int(round(luminance(c)))
return Color(y,y,y)
def areCompatible(c1,c2):
return abs(luminance(c1) - luminance(c2))>=128.0
pic = Picture(sys.argv[1])
for col in range(pic.width()):
for row in range(pic.height()):
pixcel = pic.get(col,row)
gray = toGray(pixcel)
pic.set(col,row,gray)
stddraw.setCanvasSize(pic.width(),pic.height())
stddraw.picture(pic)
stddraw.show()
#从命令行获取整数m, 从标准输入获取最近m个浮点数，并用动画展示出来
from stdpackage import stdarray, stddraw, stdio, stdstats
import sys
m = int(sys.argv[1])
list = []
stddraw.setCanvasSize(500, 500)
stddraw.setYscale(-1, 1)
for i in range(m):
stddraw.clear()
list.append([stdio.readFloat(), str(i)])
print(list)
stdstats.plotBars(list, text=True)
stddraw.show(200)
stddraw.show()