how to solve this error ? Error using horzcat Dimensions of matrices being concatenated are not consistent.

I found a code about implementation of genetic algorithm in TSP. it's running but suddenly this error appears :

Error using horzcat
Dimensions of matrices being concatenated are not consistent.

Error in elitism (line 15)
chrom = [fitness oldchrom;fitness2 newchrom];

i look for information about horzcat, it means that the array that i wanna combine dont have the same length?

can someone show me how to handle and solve this error. thank you so much!

this is code in elitism.m

% -------------------------------------------------------------------------
% Procedure of Elitism
% -------------------------------------------------------------------------
function chrom = elitism (fitness, newchrom, oldchrom, matrix_cost, nind, endNode, link_matrix)
% function name   : elitism
% function input  : 1. The fitness of old chromosomes
%  2. The new chromosomes
%  3. The previous / old chromosomes
%  4. The costs
%  5. The number of population
%  6. The destination node
%  7. The adjacency matrix of relationship between nodes
% function output : The chromosomes for the new generation
fitness2 = fitnessV(totalCost(newchrom,matrix_cost,nind,endNode,link_matrix)); 
chrom = [fitness oldchrom;fitness2 newchrom];
temp = sortrows(chrom);
chrom = temp((size(temp,1)-nind+1):size(temp,1),2:size(temp,2)); 
end

[Chaya N]

What are the dimensions of your fitness, oldchrom, fitness2 and newchrom variables?

Could you post some sample data?

[Khoirunnisya Zawawi]

in the first generation, the chromosome size is 10, so the fitness should be 10 too. for fitness2 i think it's combiination from oldchrom and newchrom.

can you show me how to check the size of those matrices? i tried size('matrix name') but it didnt work. thank you

Answer 1

[KSSV]

You are trying to merge matrices of different order in

chrom = [fitness oldchrom;fitness2 newchrom];

You have to check the dimensions of those matrices.

[Khoirunnisya Zawawi]

can you show me how to check the size of those matrices? i tried size('matrix name') but it didnt work. thank's before

[KSSV]

Simply try size(fitness) etc.

[Khoirunnisya Zawawi]

i tried it in command windows but error

Undefined function or variable 'fitness'.

[Walter Roberson]

At the command line, give the command

dbstop if error

now run the program. When it stops with the error, you can look at size() of the various objects.

[Khoirunnisya Zawawi]

thank you. i got the size

fitness = 1 1

oldchrom = 20 10

fitness2 = 1 1

newchrom = 20 10

Answer 2

[Chaya N]

Hello Khoirunnisya, could you please run the following code exactly as it is here and paste the output from your command window?

% -------------------------------------------------------------------------
% Procedure of Elitism
% -------------------------------------------------------------------------
function chrom = elitism (fitness, newchrom, oldchrom, matrix_cost, nind, endNode, link_matrix)
% function name   : elitism
% function input  : 1. The fitness of old chromosomes
%  2. The new chromosomes
%  3. The previous / old chromosomes
%  4. The costs
%  5. The number of population
%  6. The destination node
%  7. The adjacency matrix of relationship between nodes
% function output : The chromosomes for the new generation
fitness
newchrom
oldchrom
fitness2 = fitnessV(totalCost(newchrom,matrix_cost,nind,endNode,link_matrix)) 
% chrom = [fitness oldchrom;fitness2 newchrom];
% temp = sortrows(chrom);
% chrom = temp((size(temp,1)-nind+1):size(temp,1),2:size(temp,2));
chrom = 2; 
end

Your command window should display the values of the variables fitness, newchrom, oldchrom and fitness2. Do not worry about the outputs from this function yet, I just want an idea about some of your inputs.

[Khoirunnisya Zawawi]

this is the output

fitness =

      0.0208

newchrom =

       1     2     4     6     8    10     3     5     7     9
       1     2     4     6     8    10     3     5     7     9
       1     2     4     6     8    10     3     5     7     9
       1     2     4     6     8    10     3     5     7     9
       1     2     4     6     8    10     3     5     7     9
       1     2     4     6     8    10     5     3     7     9
       1     2     4     6     8    10     3     5     7     9
       1     2     4     6     8    10     3     5     7     9
       1     2     4     6     8    10     3     5     7     9
       1     2     4     6     8    10     3     5     7     9
       1     2     4     6     8    10     3     5     7     9
       1     2     4     6     8    10     3     5     7     9
       1     2     4     6     8    10     3     5     7     9
       1     2     4     6     8    10     3     5     7     9
       1     2     4     6     8    10     3     5     7     9
       1     2     4     6     8    10     3     5     7     9
       1     2     4     6     8    10     3     5     7     9
       1     2     4     6     8    10     3     5     7     9
       1     2     4     6     8    10     3     5     7     9
       1     2     4     6     8    10     7     3     5     9

oldchrom =

       1     2     4     6     8    10     3     5     7     9
       1     2     3     5     7     9     8    10     4     6
       1     2     4     6     8    10     3     5     7     9
       1     2     4     7     9    10     3     5     6     8
       1     2     4     6     8    10     3     5     7     9
       1     2     4     6     8    10     3     5     7     9
       1     3     5     6     8    10     2     4     7     9
       1     2     4     7     9     8    10     3     5     6
       1     2     3     5     7     9     8    10     4     6
       1     2     3     5     6     8    10     4     7     9
       1     2     3     5     6     8    10     4     7     9
       1     3     5     6     8    10     2     4     7     9
       1     3     5     6     8    10     2     4     7     9
       1     3     5     6     8    10     2     4     7     9
       1     3     5     7     9    10     2     4     6     8
       1     2     3     5     7     9     8    10     4     6
       1     2     4     7     9     8    10     3     5     6
       1     2     3     5     7     9     8    10     4     6
       1     2     3     5     6     8    10     4     7     9
       1     3     5     6     8    10     2     4     7     9

Index exceeds matrix dimensions.

[Chaya N]

Each of these variables has different sizes so you cannot put them together in an array. However, you could put them all inside a structure if you wish. See documentation for the struct function here to access data inside one.

You could get the output variable chrom as:

 chrom = struct('fitness',fitness,'oldchrom',oldchrom,'fitness2',fitness2,'newchrom',newchrom);

I am reinserting your entire code below for completion sake.

% -------------------------------------------------------------------------
% Procedure of Elitism
% -------------------------------------------------------------------------
function chrom = elitism (fitness, newchrom, oldchrom, matrix_cost, nind, endNode, link_matrix)
% function name   : elitism
% function input  : 1. The fitness of old chromosomes
%  2. The new chromosomes
%  3. The previous / old chromosomes
%  4. The costs
%  5. The number of population
%  6. The destination node
%  7. The adjacency matrix of relationship between nodes
% function output : The chromosomes for the new generation
fitness2 = fitnessV(totalCost(newchrom,matrix_cost,nind,endNode,link_matrix)); 
chrom = struct('fitness',fitness,'oldchrom',oldchrom,'fitness2',fitness2,'newchrom',newchrom);
end

[Khoirunnisya Zawawi]

thank you. i run those code but there's an error

Undefined operator '==' for input arguments of type 'struct'.

Error in totalCost (line 15)
for i = 1 : (find(routes(k,:)==endNode)-1)

this is totalCost.m

% -------------------------------------------------------------
% Objective function / Total cost of the path
% -------------------------------------------------------------
function ObjV = totalCost (routes, distances, nind, endNode, link_matrix)
% function name   : totalCost
% function input : 1. The paths / routes from source to destination node
%  2. The distance to each nodes
%  3. The number of chromosomes in the population
%  4. The destination node
%  5. The adjacency matrix of relationship between nodes
% function output : Array of total cost for each routes / paths 
ObjV = zeros(nind,1);
for k = 1 : nind 
    cost = 0;
for i = 1 : (find(routes(k,:)==endNode)-1)
temp = link_matrix(routes(k,i),routes(k,(i+1))); 
if temp == 1
cost = cost + distances(routes(k,i),routes(k,(i+1))); 
else
cost = 0; 
break
end
end
ObjV(k) = cost; 
end
end

[Chaya N]

That error doesn't make sense. There are no structures being passed as input into totalCost.

The input 'routes' seems to be your array newchrom, which according to your previously provided information, is a 20x10 array.

Please clear out your workspace, re-load all necessary variables and run elitism.m again.

Answer 3

[Walter Roberson]

Change

chrom = [fitness oldchrom;fitness2 newchrom];

to

chrom = [repmat(fitness, size(oldchrom,1), 1), oldchrom; repmat(fitness2, size(newchrom,1), 1), newchrom];

[Khoirunnisya Zawawi]

i tried this but then i got this error

Subscript indices must either be real positive integers or logicals.

Error in totalCost (line 16)
temp = link_matrix(routes(k,i),routes(k,(i+1)));

Error in gaspp (line 152)
ObjV = totalCost(chrom,matrix_cost,nind,endNode,link_matrix);

fitness =

totalCost

Not enough input arguments.

Error in help (line 15)
newchrom

this is totalCost.m

% -------------------------------------------------------------
% Objective function / Total cost of the path
% -------------------------------------------------------------
function ObjV = totalCost (routes, distances, nind, endNode, link_matrix)
% function name   : totalCost
% function input : 1. The paths / routes from source to destination node
%  2. The distance to each nodes
%  3. The number of chromosomes in the population
%  4. The destination node
%  5. The adjacency matrix of relationship between nodes
% function output : Array of total cost for each routes / paths 
ObjV = zeros(nind,1);
for k = 1 : nind 
    cost = 0;
for i = 1 : (find(routes(k,:)==endNode)-1)
temp = link_matrix(routes(k,i),routes(k,(i+1))); 
if temp == 1
cost = cost + distances(routes(k,i),routes(k,(i+1))); 
else
cost = 0; 
break
end
end
ObjV(k) = cost; 
end
end

[Walter Roberson]

You should never use a vector-valued function such as find(routes(k,:)==endNode) as one of the components in a ":" operator.

It might make sense to use

for i = 1 : find(routes(k,:)==endNode, 1, 'first')-1

Or it might not.

You have not given us any information about the content of routes() . I suspect that routines() can contain zeroes.

[Amrita Rana]

Error using vertcat Dimensions of matrices being concatenated are not consistent.

Error in Open_dat (line 89) left = find(diff([0; poss_reg])==1);

Can anybody help me ? i am having this error while implementing ecg signal.

[Walter Roberson]

That code does not appear anywhere in this Question, so we have to guess about the sizes.

We can guess that your poss_reg is a row vector when the code expects it to be a column vector.

Chances are there are better was of doing whatever test you are implementing.