说明：  polarPcolor是一个函数,旨在用极坐标表示伪彩色图,与径向网格允许数据的一个简单的演讲。它非常适合平面位置显示器(PPI)扫描雷达为例。我们的目标是提供信息的极坐标给定变量Z。
(polarPcolor is a function that aims to represent a pseudocolor plot in polar coordinates, with a radial grid to allow an easy lecture of the data. It is well suited for Plan Position Indicator (PPI) scan for radar for example. The goal is to provide information about the polar coordinate of a given variable Z. )