But knowing the matlab rules, the most evident problem in you code is the name of the function. There exist a matlab function named kmeans

主成分分析方法通过建立两个主成分的二位图，对数值特异点的剔除，减少数据处理中无关项的干扰，-Free Source Code for Image segmentation and Extraction malic: A Realtime Face Recognition System Source Code Face Detection C++ Library with Skin and Motion Analysis Face Recognition

code for kmeans and fuzzy-means in matlab