neural-networks-and-deep-learning valley2.py
2016-07-21 22:25
274 查看
又一个山沟沟
"""valley2.py ~~~~~~~~~~~~~ Plots a function of two variables to minimize. The function is a fairly generic valley function. Note that this is a duplicate of valley.py, but omits labels on the axis. It's bad practice to duplicate in this way, but I had considerable trouble getting matplotlib to update a graph in the way I needed (adding or removing labels), so finally fell back on this as a kludge solution. """ #### Libraries # Third party libraries from matplotlib.ticker import LinearLocator # Note that axes3d is not explicitly used in the code, but is needed # to register the 3d plot type correctly from mpl_toolkits.mplot3d import axes3d import matplotlib.pyplot as plt import numpy fig = plt.figure() ax = fig.gca(projection='3d') X = numpy.arange(-1, 1, 0.1) Y = numpy.arange(-1, 1, 0.1) X, Y = numpy.meshgrid(X, Y) Z = X**2 + Y**2 colortuple = ('w', 'b') colors = numpy.empty(X.shape, dtype=str) for x in xrange(len(X)): for y in xrange(len(Y)): colors[x, y] = colortuple[(x + y) % 2] surf = ax.plot_surface(X, Y, Z, rstride=1, cstride=1, facecolors=colors, linewidth=0) ax.set_xlim3d(-1, 1) ax.set_ylim3d(-1, 1) ax.set_zlim3d(0, 2) ax.w_xaxis.set_major_locator(LinearLocator(3)) ax.w_yaxis.set_major_locator(LinearLocator(3)) ax.w_zaxis.set_major_locator(LinearLocator(3)) ax.text(1.79, 0, 1.62, "$C$", fontsize=20) plt.show()
相关文章推荐
- HDU 5728 PowMod
- CCNA系列八之STP协议
- 【分治】折半查找法
- 创业17
- 面向对象的三大基石(封装,继承和复合,多态)
- 行为的封装
- Spring 通知
- 如何获取chrome视频缓存位置
- error: call to '__open_missing_mode' declared with attribute error:
- CrossDomain.xml的作用及其简单用法
- httpd 2.2 2.4配置
- neural-networks-and-deep-learning valley.py
- PF_INET 和 AF_INET 的区别
- iOS获取汉字的拼音
- Spring 之 AOP
- KNN(四)--FLANN库介绍及其应用
- js基础知识
- ubuntu 14.04 linux下wifi驱动安装使用的一些笔记
- 时光轮回 我知道自己该怎么做了
- http协议