通过经纬度获取两地之间的角度，并判断所在方向，在经济地理学上可以应用。函数要求两个参数（经纬度，方向个数），其中经纬度是一个两列的矩阵，第一列为纬度，第二列为经度，方向个数为2或者4，当为2时判断任意两地的方向是东西方向还是南北方向，当是4时 可以判断是东西、南北，东南-西北，西南-东北方向。输出为矩阵，表示任意两地的方向。(Through the latitude and longitude to obtain the angle between the two places, and determine the direction, which can be applied in economic geography. The function requires two parameters (latitude and longitude direction number), which is the latitude and longitude of a matrix of two columns, the first column is listed as the second latitude, longitude, direction number is 2 or 4, when the 2 Judgment of any two places in the direction of East-West or north-south direction, when 4 can to determine what, North and south, southeast northwest, southwest - Northeast direction. The output is the matrix, representing the direction of any two places.)