Error using feof, Invalid file identifier. Use fopen to generate a valid file identifier.

5 次查看（过去 30 天）
Sirisha Arli
Sirisha Arli 2016-3-25
回答： Walter Roberson 2016-3-25
fin = fopen('mcs_ansys_standard.txt','rt');
fout = fopen('mcs_ansys.txt','wt');
while ~feof(fin);
str = fgetl(fin);
if strncmp(str,'F,P51X,FY,-',length('F,P51X,FY,-'));
str =strcat('F,P51X,FY,-',num2str(P));
elseif strncmp(str,'MPDATA,EX,1,,',length('MPDATA,EX,1,,'));
str =strcat('MPDATA,EX,1,,',num2str(E));
elseif strncmp(str,'SFBEAM,P51X,1,PRES,',length('SFBEAM,P51X,1,PRES,'));
str =strcat('SFBEAM,P51X,1,PRES,',num2str(W));
end
fprintf(fout, '%s\r\n', str);
end
fclose(fin);
fclose(fout);
!"C:\Program Files\ANSYS Inc\v150\ANSYS\bin\winx64\ansys150.exe" -p ansys -dir "C:\Users\Sirisha\Documents\MATLAB\ranjith" -j "MCS_FEA" -dvt -s read -l en-us -b -i "C:\Users\Sirisha\Documents\MATLAB\ranjith\mcs_ansys.txt" -o "C:\Users\Sirisha\Documents\MATLAB\ranjith\deflecion_out.txt"
fid = fopen('del_max.out','rt');
flag_string = 'NODE UY';
while ~feof(fid);
s = fgets(fid);
flag = strfind(s,flag_string);
if flag
s1 = fgets(fid);
s2 = fgets(fid);
s3 = fgets(fid);
break
end
end
s = str2num(strtrim(s2));
deflection(i) = -s(2);
fclose('all');
end

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回答（1 个）

Walter Roberson
Walter Roberson 2016-3-25
mcs_ansys_standard.txt could not be found on the MATLAB path. It either does not exist at all, or is in some directory that is not on the MATLAB path.

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