通常百度到的matlab生成极坐标图只有单个的，通过这个piliang_text1.m可以批量输出函数directivit1的结果组成的极坐标图，压缩文件中有例图(Usually the matlab generated polar coordinates of the Baidu are only single, through which the piliang_text1.m can batch output the polar coordinates of the results of the function directivit1, and an example diagram in the compressed file.)