python使用matplotlib绘图

今天太晚了，参考链接先放在这里，明天再根据自己的实际情况整体一下，http://www.cnblogs.com/qianlifeng/archive/2012/02/13/2350086.html

实际上遇到的源代码作为例子贴上。

# show your cluster only available with 2-D data 
#centroids为k个类别，其中保存着每个类别的质心
#clusterAssment为样本的标记，第一列为此样本的类别号，第二列为到此类别质心的距离 
def showCluster(dataSet, k, centroids, clusterAssment):  
    numSamples, dim = dataSet.shape  
    if dim != 2:  
        print ("Sorry! I can not draw because the dimension of your data is not 2!")  
        return 1  

    mark = [‘or‘, ‘ob‘, ‘og‘, ‘ok‘, ‘^r‘, ‘+r‘, ‘sr‘, ‘dr‘, ‘<r‘, ‘pr‘]  
    if k > len(mark):  
        print ("Sorry! Your k is too large! please contact wojiushimogui")  
        return 1 


    # draw all samples  
    for i in range(numSamples):  
        markIndex = int(clusterAssment[i, 0])  #为样本指定颜色
        plt.plot(dataSet[i, 0], dataSet[i, 1], mark[markIndex])  

    mark = [‘Dr‘, ‘Db‘, ‘Dg‘, ‘Dk‘, ‘^b‘, ‘+b‘, ‘sb‘, ‘db‘, ‘<b‘, ‘pb‘]  
    # draw the centroids  
    for i in range(k):  #画每个类的质心点
        plt.plot(centroids[i, 0], centroids[i, 1], mark[i], markersize = 12)  

    plt.show()