are my codes pre-initialized for large arrays?

how to improve it?

%create binary stl file for i = (length(ftitle)+1):80 ftitle(i) = end fwrite(fid,ftitle, 'char+1'); fnumber = Tength(OriCell. faces) + NumCells; fwrite(tid, fnumber, 'int32'); for i = 1:fnumber for 1:12 fwrite(fid, f_write(i,j),'float32'); end fwrite(tid, 0, 'int 16'); end fclose(fid); %create binary stl file for i = (length(ftitle)+1):80 ftitle(i) = end fwrite(fid,ftitle, 'char+1'); fnumber = Tength(OriCell. faces) + NumCells; fwrite(tid, fnumber, 'int32'); for i = 1:fnumber for 1:12 fwrite(fid, f_write(i,j),'float32'); end fwrite(tid, 0, 'int 16'); end fclose(fid)