Error writing to a file
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Shreenath Krishnamurthy
el 11 de Mzo. de 2023
Comentada: Shreenath Krishnamurthy
el 3 de Abr. de 2023
I have a gamainfile
options = optimoptions('gamultiobj','UseParallel', true,'UseVectorized', false,'ParetoFraction',0.35,...
'PopulationSize',60,'Generations',60, 'CrossoverFraction',0.5,'CrossoverFcn',@crossoverintermediate ,'MutationFcn',...
@mutationadaptfeasible)
[X,fval,exitflag,output,final_pop]=gamultiobj(@functionfile,NumVar,A,b,[],[],...
Xlow,Xup,options);
The function file has
Input parameters X(1)…X(6), constants
[time1,Y1]=ode15s(odefn1…..)
[time2,Y2]=ode15s(odefn1…..)
Y1 and Y2 have dimensions (n x 270)
n is the number of rows based on the time step
Calc1 to Calc4 are calculated by integrating various Y values in Y1 and Y2.
calc1= f1(Y1,Y2);
calc2= f2(Y1,Y2);
calc3= f3(Y1,Y2);
calc4= f1(Y1,Y3);
The objectives are
Obj1 =Calc3/100+ 10000*(max(0,constraint1-calc1/100))^2+10000*(max(0,constraint2-calc3/100))^2;
Obj2 =1/calc4+ 10000*(max(0,constraint1-calc1/100))^2+10000*(max(0,constraint2-calc3/100))^2;
filename = [tempname('directory name),'.txt'];
fid = fopen(filename,'w');
fprintf(fid, '%f %f %f %f %f %f %f %f %f %f\n',X(1),X(2),X(3),X(4),X(5),X(6),calc1,calc2,calc3,calc4);
fclose(fid);
I get an error message
Invalid fileID for worker. File operations must occur on the worker where the file was opened
How do I avoid this error and is there a better way to save all the values that I write to the files..
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Respuestas (1)
Ganapathi Subramanian
el 27 de Mzo. de 2023
It is my understanding that you are working on a program to store its data inside a file and have trouble in writing the data to the file. Refer to the below code snippet for writing the data to a unique temporary file.
filename=[tempname('C:/foldername'),'.txt'];
fid=fopen(filename,'w');
i=5.6;
fprintf(fid,'%f',i);
For more information regarding ‘tempname’, refer this link
Refer to the below documentation for more information regarding ‘fprintf’.
3 comentarios
Ganapathi Subramanian
el 27 de Mzo. de 2023
Hi Shreenath Krishnamurthy,can you please share more information regarding 'if multiple files access the same work it should not be a problem right' .It is not clear.What does 'multiple files' depict? Is it the set of programs?
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