How do I pass a filename to a routine in Matlab's command window?
3 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Harald von der Osten
am 19 Sep. 2021
Bearbeitet: Jan
am 23 Sep. 2021
In the Matlab Command window I would like to run a function with an input parameter, like this:
>> xxxreplace oldGEOPLOT
s =
"./html/oldGEOPLOT.html"
Error using fread
Invalid file identifier. Use fopen to generate a valid file identifier.
Error in xxxreplace (line 14)
ff=fread(fid,'*char')';
I'm using this code :
function file=xxxreplace(x)
f=string(x);
s=strcat('./html/',f,'.html')
fid=fopen(s,'r');
ff=fread(fid,'*char')';
fclose(fid);
ff =strrep(ff,'.png" alt="">','.png" alt="" width="360">');
fid=fopen('./html/new.html','w');
fprintf(fid,'%s',ff);
fclose(fid);
disp(s)
end
Why do I get this error?
Thanks a lot,
Harry
4 Kommentare
Akzeptierte Antwort
Jan
am 19 Sep. 2021
Bearbeitet: Jan
am 23 Sep. 2021
The error message is clear: The file does not exist. Although you assume, that the current folder is the same, this is not true. Check this explicitly:
function file = xxxreplace(x) % What is "file"?
s = fullfile('./html/', [x, '.html']);
[fid, msg] = fopen(s, 'r');
assert(fid > 0, msg);
ff = fread(fid,'*char')';
fclose(fid);
ff = strrep(ff,'.png" alt="">','.png" alt="" width="360">');
[fid, msg] = fopen('./html/new.html', 'w');
assert(fid > 0, msg);
fprintf(fid, '%s', ff);
fclose(fid);
end
Trusting on the current folder is a bad programming practice. Any timer or gui callback might change the current folder unexpectedly. Prefer to use absolute file names.
3 Kommentare
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Environment and Settings finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!