Index exceeds the number of array elements (4)

I'm using a database introduced as a 464x10 matrix and am getting the error ''Index exceeds the number of array elements (4)'' on line:

case 2

scatter(zplot(i,1),zplot(i,2), ...
    [data.marker{lbl_train(i)},data.color{lbl_train(i)}], ...
    'MarkerFaceColor',data.color{lbl_train(i)});

I can't see the problem as the for-loop is programmed to read 464 elements

clf;clear all; close all;
dbstop if error
BD=xlsread('Excel STIX,  Unido - Simplificar','B4:K467');
lbl_train= BD(:,10);
E=BD(:,1);%eslora
M=BD(:,3);%manga
K=BD(:,4);%calado
D=BD(:,5);%desplazamiento
I=[E M K D];
Media=mean(I);
Desv=std(I);
Z=(I.*Media)./Desv;
Sigma=cov(Z);
lambda=eig(Sigma);
[lambda,isort]=sort(lambda,'descend');
[V,L,~]=eig(Sigma);
V=V(:,isort);
L=L(isort,isort);

% energy weighting
csum=0;
for ilamb=1:length(lambda)
    p(ilamb,1)=lambda(ilamb)/sum(lambda);
    csum=csum+p(ilamb);
    c(ilamb,1)=csum;
end
table(lambda,p,c)
figure(1)
clf
hold on
stairs(c,'k');
bar(p);
hold off;
legend({'Accumulative Variance','Individual Variance'},'location','east');
xlabel('Principal modes');
ylabel('Variance ratio');
%% Eigen-Projection
nPC=2;
vPC=1:nPC;
W=V(:,vPC);
%% Zr
Zr=Z*W;

figure(2)
clf
data.legend={'1','2','3','4'};
data.color={'r','b','g','y'};
data.marker={'s','d','o','*'};
zplot=Zr;

for i=1:size(zplot,1)
    hold on
    switch (nPC)
        case 1
            scatter(zplot(i,1),0,[data.marker{lbl_train(i)},data.color{lbl_train(i)}],'MarkerFaceColor',data.color{lbl_train(i)});
        case 2
            scatter(zplot(i,1),zplot(i,2),[data.marker{lbl_train(i)},data.color{lbl_train(i)}],'MarkerFaceColor',data.color{lbl_train(i)});
        case 3
            scatter3(zplot(i,1),zplot(i,2),zplot(i,3),[data.marker{lbl_train(i)},data.color{lbl_train(i)}],'MarkerFaceColor',data.color{lbl_train(i)});
    end
    hold off
end

Any ideas?

Answer 1

[Jan]

You stop Matlab at the error already by dbstop if error. Then use the debugger to check the sizes of the arrays:

size(zplot)
size(lbl_train)
lbl_train(i)
size(data.marker)
size(data.color)

Which array is the problem?

I guess that lbl_train has an element > 4.

[Francisco Seijo Alarcon]

It's been solved. I had a problem with the database. I solved it and is running.

Thank you very much