等高线图python中的长错误

Question

我正在尝试创建一个轮廓图,其中x坐标为标签EF,y标记为EB,z为标记为a的函数.它返回下面发布的长错误.任何帮助,将不胜感激.错误是

File "contour.py", line 19, in <module>
c = plt.contour(EF,EB,a)
  File "/usr/lib/pymodules/python2.7/matplotlib/pyplot.py", line 2016, in contour
    ret = ax.contour(*args, **kwargs)
  File "/usr/lib/pymodules/python2.7/matplotlib/axes.py", line 7326, in contour
    return mcontour.QuadContourSet(self, *args, **kwargs)
  File "/usr/lib/pymodules/python2.7/matplotlib/contour.py", line 1088, in __init__
    ContourSet.__init__(self, ax, *args, **kwargs)
  File "/usr/lib/pymodules/python2.7/matplotlib/contour.py", line 686, in __init__
    self._process_args(*args, **kwargs)
  File "/usr/lib/pymodules/python2.7/matplotlib/contour.py", line 1101, in _process_args
    x, y, z = self._contour_args(args, kwargs)
  File "/usr/lib/pymodules/python2.7/matplotlib/contour.py", line 1148, in _contour_args
    x,y,z = self._check_xyz(args[:3], kwargs)
  File "/usr/lib/pymodules/python2.7/matplotlib/contour.py", line 1180, in _check_xyz
    raise TypeError("Input z must be a 2D array.")
TypeError: Input z must be a 2D array.

Answer 1

错误说明了这一点

TypeError: Input z must be a 2D array. 

如果你看一下输入对象的大小:

print EF.shape, EB.shape, a.shape
(51,) (51,) (51,)

你会发现这些不是 2D数组.您打算使用X而Y不是吗？

当我做出改变时

a = ((1+.5*(np.exp(1.7*X)+np.exp(1.7*Y)+np.exp(1.7*(X+Y))))/(1+np.exp(1.7*X)+np.exp(1.7*Y)+np.exp(1.7*(X+Y))))
c = plt.contour(EF,EB,a,30)

输出是

看起来您可能需要调整参数空间,因为所有有趣的东西都在附近(0,0).