for about three days I have had this error message: Cell contents reference from a non-cell array object.

1 Ansicht (letzte 30 Tage)
lambda_snr_vec = ones(1,nodes);
sigma_sample = 2;
Counter = 1;
for i=1:steps
for child=1:nodes
% sampling sigma
lambda_snr = lambda_snr_vec(1,child);
sum_Delta2 = 0;
for component=1:Kg; * * _ |%%%%%the problem is here%%%%%%%| _ * *
sum_Delta2 = sum_Delta2 +y{child}{component}'*inv(eye(length(find(vector==component)))+lambda_snr* X{child}{component}'* X{child}{component})*y{child}{component};
end
A=alpha_sig+((m-1)/2);
B=beta_sig+(sum_Delta2/2);
new_sigma_sample= gamrnd(A,B);
%sampling Wg,k
for component=1:Kg
sigma_star = inv(lambda_snr * eye(cardinality_parents{child}+1) + X{child}{component}*X{child}{component}');
A = sigma_star * X{child}{component} * y{child}{component};
B = new_sigma_sample*sigma_star;
regress_par_sample{component} = mvnrnd(A,B)';
end
%sampling lambda
sum_regress_para = 0;
for component=1:Kg;
sum_regress_para = sum_regress_para + regress_par_sample{component}'*regress_par_sample{component};
end
A = alpha_sig+(Kg*(cardinality_parents{child}+1)/2);
B = beta_sig+(1/2 * new_sigma_sample* sum_regress_para);
new_lambda_sample= gamrnd(A,B);
  3 Kommentare
Guillaume
Guillaume am 15 Jun. 2015
The error message should have given you a line where the error occurs. Which line is that? As a rule, when asking help about an error message, paste the entire error message (everything in red) in the body of the question.

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Akzeptierte Antwort

Guillaume
Guillaume am 15 Jun. 2015
There are a number of cell references used in your code. Are all of them actually cell arrays? In particular:
  • Are X and y both cell arrays. If not, X{child} or y{child} is invalid
  • If they are, are all the cell themselves cell arrays. If not, X{child}{componenent} or y{child}{component} is not valid.
  • Has regress_par_sample been declared as a cell array
The best way for you to find out the problem is to use the debugger. At the command prompt write:
dbstop if error
Run your code, and when it stops see what the content and type of X{child} or y{child} is. Most likely it's empty or not a cell array:
x{child} %view content
y{child} %view content
class(x{child}) %view type, must be cell
class(y{child}) %view type, must be cell

Weitere Antworten (4)

David H
David H am 15 Jun. 2015
The problem is likely that one of X or y is not defined as a cell array.
Can you put two lines of code before the error which output class(X) and class (y)? If one comes out as something that isn't "cell" look through the rest of the code to find where you might have accidentally overwritten it.

Walter Roberson
Walter Roberson am 15 Jun. 2015
At the command prompt, give the command
dbstop if error
and then run the program. When it stops,
if ~iscell(X)
fprintf(2,'X is not a cell!');
else
for KKK = 1 : length(X)
if ~iscell(X{KKK})
fprintf(2,'X{%d} is not a cell!', KKK);
break;
end
end
end
if ~iscell(y)
fprintf(2,'y is not a cell!');
else
for KKK = 1 : length(y)
if ~iscell(y{KKK})
fprintf(2,'y{%d} is not a cell!', KKK);
break;
end
end
end
  1 Kommentar
Walter Roberson
Walter Roberson am 15 Jun. 2015
Your statement
y=y{child}{component}'
is overwriting all of y with the current component. You do not make the same mistake for x as you use
X=x{child}{component};
notice that the output variable "X" is not the same as the input variable "x" so the treatment of x is fine in that line. On the other hand your line 59 is going to try to access X{child}{component} and that doesn't exist.
You need to review your code and pay attention to the variable names.

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M Shaka
M Shaka am 15 Jun. 2015
I attached the whole program. I would be grateful if you could have a look at it.

M Shaka
M Shaka am 15 Jun. 2015
the error is in line59.

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