>>  n=6;

ns=[3 3 2 2 2 2];

A=1;B=2;C=3;D=4;E=5;Class=6;

order=[4 5 6 3 2 1];

max_fan_in=1;

result_matrix=zeros(ns(Class),ns(Class));

%读入数据

data_train=load('F:\研一\matlab学习\matlab\CJYS1.txt');

[num_attrib,num_cases]=size(data_train');

data_train=zeros(num_attrib,num_cases);

%建立贝叶斯网络

dag_gbn=zeros(n,n);

dag_gbn=learn_struct_K2(data_train,ns,order,'max_fan_in',max_fan_in);

bnet2=mk_bnet(dag_gbn,ns);

draw_graph(dag_gbn)

ans =

0.5500    0.2000    0.4500    0.4500    0.5500    0.7000

>>  n=6;

ns=[3 3 2 2 2 2];

A=1;B=2;C=3;D=4;E=5;Class=6;

order=[4 5 6 3 2 1];

max_fan_in=2;

result_matrix=zeros(ns(Class),ns(Class));

data_train=load('F:\研一\matlab学习\matlab\CJYS1.txt');

[num_attrib,num_cases]=size(data_train');%读入数据

data_train0=zeros(num_attrib,num_cases);

dag_gbn=zeros(n,n);

dag_gbn=learn_struct_K2(data_train0,ns,order,'max_fan_in',max_fan_in);

bnet2=mk_bnet(dag_gbn,ns);

draw_graph(dag_gbn);%建立贝叶斯网络

priors=1;

seed=0;

rand('state',seed);

for i=1:n

bnet2.CPD{i}=tabular_CPD(bnet2,i,'CPT','unif','prior_type','dirichlet','dirichlet_type','BDeu','dirichlet_weight',priors);

end

bnet4=bayes_update_params(bnet2,data_train0);

CPT3=cell(1,n);

for i=1:n

s=struct(bnet4,CPD{i});

CPT3{i}=s.CPT;

end

draw_graph(dag_gbn) %画出图形

??? 　　　 bnet2.CPD{i}=tabular_CPD(bnet2,i,'CPT','unif','prior_type','dirichlet','dirichlet_type','BDeu','dirichlet_weight',priors);

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Error: The input character is not valid in MATLAB statements or expressions.

请帮我看看哪里错了，该怎么改？

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