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  • 聚类——WKFCM的matlab程序

    聚类——WKFCM的matlab程序

    作者:凯鲁嘎吉 - 博客园 http://www.cnblogs.com/kailugaji/

    聚类——WKFCM文章中已介绍了WKFCM算法的理论知识,现在用matlab进行实现,下面这个例子是用FCM初始化聚类中心,也可以随机初始化聚类中心。

    1.matlab程序

    WKFCM_main.m

    %function [ave_acc_WKFCM,max_acc_WKFCM,min_acc_WKFCM,ave_iter_WKFCM,ave_run_time]=WKFCM_main(X,real_label,K)
    function [ave_acc_WKFCM,max_acc_WKFCM,min_acc_WKFCM,ave_iter_FCM,ave_iter_WKFCM,ave_run_time]=WKFCM_main(X,real_label,K)
    %输入K:聚的类,max_iter是最大迭代次数,T:遗传算法最大迭代次数,n:种群个数 X:未归一化
    %输出ave_acc_KFCM:迭代max_iter次之后的平均准确度,iter:实际KFCM迭代次数
    t0=cputime;
    max_iter=20;
    s=0;
    s_1=0;
    s_2=0;
    accuracy=zeros(max_iter,1);
    iter_WKFCM_t=zeros(max_iter,1);
    iter_FCM_t=zeros(max_iter,1);
    %对data做最大-最小归一化处理
    % [data_num,~]=size(data);
    % X=(data-ones(data_num,1)*min(data))./(ones(data_num,1)*(max(data)-min(data)));
    for i=1:max_iter
        %[label,~,iter_WKFCM]=My_WKFCM(X,K);
        [label,~,iter_WKFCM,iter_FCM]=My_WKFCM(X,K);
        iter_WKFCM_t(i)=iter_WKFCM;
        iter_FCM_t(i)=iter_FCM;
        accuracy(i)=succeed(real_label,K,label);
        s=s+accuracy(i);
        s_1=s_1+ iter_WKFCM_t(i);
        s_2=s_2+ iter_FCM_t(i);
        %fprintf('第 %2d 次,WKFCM的迭代次数为:%2d,准确度为:%.8f
    ', i, iter_WKFCM_t(i), accuracy(i));
        fprintf('第 %2d 次,FCM的迭代次数为:%2d,WKFCM的迭代次数为:%2d,准确度为:%.8f
    ', i, iter_FCM_t(i), iter_WKFCM_t(i), accuracy(i));
    end
    ave_iter_FCM=s_2/max_iter;
    ave_iter_WKFCM=s_1/max_iter;
    ave_acc_WKFCM=s/max_iter;
    max_acc_WKFCM=max(accuracy);
    min_acc_WKFCM=min(accuracy);
    run_time=cputime-t0;
    ave_run_time=run_time/max_iter;
    

    My_WKFCM.m

    %function [label_1,para_miu,iter]=My_WKFCM(X,K)
    function [label_1,para_miu,iter,iter_FCM]=My_WKFCM(X,K)
    %输入K:聚类数
    %输出:label_1:聚的类, para_miu_new:模糊聚类中心μ,responsivity:模糊隶属度
    format long
    eps=1e-4;  %定义迭代终止条件的eps
    %sigma_2=2^(-4);  %高斯核函数的参数sigma^2
    sigma_2=150;  %高斯核函数的参数sigma^2
    beta=2;
    alpha=2;  %模糊加权指数,[1,+无穷)
    T=100;  %最大迭代次数
    fitness=zeros(T,1);
    [X_num,X_dim]=size(X);
    distant=zeros(X_num,K,X_dim);
    kernel_fun=zeros(X_num,K,X_dim);
    R_temp=zeros(X_num,K,X_dim);
    miu_up=zeros(X_num,K,X_dim);
    miu_down=zeros(X_num,K,X_dim);
    W_temp=zeros(X_num,K,X_dim);
    J_temp=zeros(X_num,K,X_dim);
    count=zeros(X_num,1);  %统计distant中每一行为0的个数
    responsivity=zeros(X_num,K);
    R_up=zeros(X_num,K);
    W_up=zeros(K,X_dim);
    %----------------------------------------------------------------------------------------------------
    %随机初始化属性权重K*X_dim
    para_weight=ones(K,X_dim)./X_dim;
    %随机初始化K个聚类中心
    % rand_array=randperm(X_num);  %产生1~X_num之间整数的随机排列
    % para_miu=X(rand_array(1:K),:);  %随机排列取前K个数,在X矩阵中取这K行作为初始聚类中心
    %用FCM初始聚类中心
    [~,para_miu,iter_FCM]=My_FCM(X,K);
    % ----------------------------------------------------------------------------------------------------
    % WKFCM算法
    for t=1:T
        %计算隶属函数K*X_num
        for j=1:X_dim
            for i=1:X_num
                for k=1:K
                    distant(i,k,j)=(X(i,j)-para_miu(k,j))^2;
                    kernel_fun(i,k,j)=exp((-distant(i,k,j))/sigma_2);
                    R_temp(i,k,j)=(para_weight(k,j)^beta)*(1-kernel_fun(i,k,j));
                end
            end
        end
        R_down=sum(R_temp,3);
        for i=1:X_num
            count(i)=sum(R_down(i,:)==0);
            if count(i)>0
                for k=1:K
                    if R_down(i,k)==0
                        responsivity(i,k)=1./count(i);
                    else
                        responsivity(i,k)=0;
                    end
                end
            else
                R_up(i,:)=R_down(i,:).^(-1/(alpha-1));  %隶属度矩阵的分子部分N*K
                responsivity(i,:)= R_up(i,:)./sum( R_up(i,:),2);
            end
        end
         %更新聚类中心K*X_dim
        for j=1:X_dim
            for i=1:X_num
                for k=1:K
                    miu_up(i,k,j)=responsivity(i,k)*kernel_fun(i,k,j)*X(i,j);
                    miu_down(i,k,j)=responsivity(i,k)*kernel_fun(i,k,j);
                end
            end
        end
        miu_up_sum=sum(miu_up,1);
        miu_down_sum=sum(miu_down,1);
        for k=1:K
            for j=1:X_dim
                if para_weight(k,j)==0
                    para_miu(k,j)=0;
                else
                    para_miu(k,j)=miu_up_sum(1,k,j)/miu_down_sum(1,k,j);
                end
            end
        end
        %更新属性权重K*X_dim
         for j=1:X_dim
            for i=1:X_num
                for k=1:K
                    distant(i,k,j)=(X(i,j)-para_miu(k,j))^2;
                    kernel_fun(i,k,j)=exp((-distant(i,k,j))./sigma_2);
                    W_temp(i,k,j)=(responsivity(i,k)^alpha)*(1-kernel_fun(i,k,j));
                end
            end
         end
        W_down=sum(W_temp,1);
        for k=1:K
            for j=1:X_dim
                    if W_down(1,k,j)==0
                        para_weight(k,j)=1./X_dim;
                    else
                        W_up(k,:)=W_down(1,k,:).^(-1/(beta-1));  %属性权重矩阵的分子部分K*X_dim
                        para_weight(k,:)= W_up(k,:)./sum( W_up(k,:),2);
                    end
            end
        end  
        %计算目标函数值
        for j=1:X_dim
            for i=1:X_num
                for k=1:K
                    distant(i,k,j)=(X(i,j)-para_miu(k,j))^2;
                    kernel_fun(i,k,j)=exp((-distant(i,k,j))./sigma_2);
                    J_temp(i,k,j)=(responsivity(i,k)^alpha)*(para_weight(k,j)^beta)*(1-kernel_fun(i,k,j));
                end
            end
        end
        fitness(t)=2*sum(sum(sum( J_temp)));
        if t>1  
            if abs(fitness(t)-fitness(t-1))<eps
                break;
            end
        end
    end
    iter=t;  %实际迭代次数
    [~,label_1]=max(responsivity,[],2);
    

    2.在UCI数据库的iris上的运行结果

    >> [ave_acc_WKFCM,max_acc_WKFCM,min_acc_WKFCM,ave_iter_FCM,ave_iter_WKFCM,ave_run_time]=WKFCM_main(data,real_label,3)
    第  1 次,FCM的迭代次数为:14,WKFCM的迭代次数为: 4,准确度为:0.92666667
    第  2 次,FCM的迭代次数为:17,WKFCM的迭代次数为: 4,准确度为:0.92666667
    第  3 次,FCM的迭代次数为:28,WKFCM的迭代次数为: 4,准确度为:0.92666667
    第  4 次,FCM的迭代次数为:14,WKFCM的迭代次数为: 4,准确度为:0.92666667
    第  5 次,FCM的迭代次数为:20,WKFCM的迭代次数为: 4,准确度为:0.92666667
    第  6 次,FCM的迭代次数为:11,WKFCM的迭代次数为: 4,准确度为:0.92666667
    第  7 次,FCM的迭代次数为:19,WKFCM的迭代次数为: 4,准确度为:0.92666667
    第  8 次,FCM的迭代次数为:15,WKFCM的迭代次数为: 4,准确度为:0.92666667
    第  9 次,FCM的迭代次数为:14,WKFCM的迭代次数为: 4,准确度为:0.92666667
    第 10 次,FCM的迭代次数为:11,WKFCM的迭代次数为: 4,准确度为:0.92666667
    第 11 次,FCM的迭代次数为:21,WKFCM的迭代次数为: 4,准确度为:0.92666667
    第 12 次,FCM的迭代次数为:20,WKFCM的迭代次数为: 4,准确度为:0.92666667
    第 13 次,FCM的迭代次数为:10,WKFCM的迭代次数为: 4,准确度为:0.92666667
    第 14 次,FCM的迭代次数为:28,WKFCM的迭代次数为: 4,准确度为:0.92666667
    第 15 次,FCM的迭代次数为:18,WKFCM的迭代次数为: 4,准确度为:0.92666667
    第 16 次,FCM的迭代次数为:16,WKFCM的迭代次数为: 4,准确度为:0.92666667
    第 17 次,FCM的迭代次数为:12,WKFCM的迭代次数为: 4,准确度为:0.92666667
    第 18 次,FCM的迭代次数为:20,WKFCM的迭代次数为: 4,准确度为:0.92666667
    第 19 次,FCM的迭代次数为:12,WKFCM的迭代次数为: 4,准确度为:0.92666667
    第 20 次,FCM的迭代次数为:13,WKFCM的迭代次数为: 4,准确度为:0.92666667
    
    ave_acc_WKFCM =
       0.926666666666666
    
    max_acc_WKFCM =
       0.926666666666667
    
    min_acc_WKFCM =
       0.926666666666667
    
    ave_iter_FCM =
      16.649999999999999
    
    ave_iter_WKFCM =
         4
    
    ave_run_time =
       0.232812500000000
    
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  • 原文地址:https://www.cnblogs.com/kailugaji/p/10090537.html
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