Hello. Could anyone help me? I keep getting "Index exceeds matrix dimensions."

Error in data_inductor23 (line 70)
        max_ipc = max_ipc + (tw_max - DM(i+1,3))*Tool_Power(b(j))*0.1;

.

tw_max = 40; %tw_max = time window max
Tool_Power=[100;120;1500;2800];
n=length(DM(:,1));

min_dc = length(unique(DM(:,1))) - 1;
max_dc = n - 1;
min_tc = length(nonzeros(unique(DM(:,3:end)))) - 1;
max_tc = 0;
for i = 1:n-1
    a=length(nonzeros(DM(i,3:end)));
    b=length(nonzeros(DM(i+1,3:end)));
    max_tc = max_tc + (a.*b);
end
max_ipc = 0;
for i = 1:n
    a=length(nonzeros(DM(i,3:end)));
    b=nonzeros(DM(i,3:end));
    for j = 1:a
        max_ipc = max_ipc + (tw_max - DM(i+1,3))*Tool_Power(b(j))*0.1;
    end
end
max_ip = max_ipc/3600;

[KSSV]

This question you have asked yesterday also.....you need to check the dimensions of each variable and loop variable. We cannot help you unless we have data in hand.

[per isakson]

I get the error

Undefined function or variable 'DM'

How is DM defined?

See

• Debug a MATLAB Program
• Examine Values While Debugging

[arif abdullah]

Yes it is. Could I send to you the data ?

[arif abdullah]

%DM data matrix: 
%      Dir Time Col 3-5:Tool
DM = [  6  39  1  0  0  0  0
        6  31  1  0  0  0  0
        6  48  2  0  0  0  0
        3  89  2  0  0  0  0
        3  27  3  0  0  0  0
        6  48  3  0  0  0  0
        6  73  3  0  0  0  0
        2  21  2  0  0  0  0
        3  64  2  0  0  0  0
        2  12  4  0  0  0  0
        6  15  4  0  0  0  0
        4  65  5  0  0  0  0
        4  58  6  0  0  0  0
        4  60  7  8  0  0  0
        1  45  7  8  0  0  0
        1  32  9  0  0  0  0
        3  27  10  0  0  0  0
        6  70  11  0  0  0  0
        6  22  12  0  0  0  0
        2  44  1  13  0  0  0
        2  19  14  0  0  0  0
        6  20  14  0  0  0  0
        6  34  0  0  0  0  0];

Answer 1

[Walter Roberson]

Your DM has non-zero values as large as 14 in columns 3 to end. Those become your b values. You use b(j) to index Tool_Power, but Tool_Power is only length 4.

[per isakson]

Matlab R2016a says:

Index exceeds matrix dimensions.
Error in cssm (line 45)
        max_ipc = max_ipc + (tw_max - DM(i+1,3))*Tool_Power(b(j))*0.1;

Why isn't Matlab more helpful and tells the user which variable and which values of which indicies are involved?