Question

我有一个以下参数文件，我想在其中更改左侧的值，从gam.dat开始直到1 1 1（针对-tail variable, head variable, variogram type），而不更改文件的格式。

将在循环内调用此参数文件，以便循环的每次迭代都需要更改此参数文件中的值。

从文件中读取和写入一直是我的弱点。有关如何轻松完成此任务的任何帮助？谢谢！

                  Parameters
                  **********

START OF PARAMETERS:
gam.dat                         -file with data
1   1                           -   number of variables, column numbers
-1.0e21     1.0e21              -   trimming limits
gam.out                         -file for output
1                               -grid or realization number
100   1.0   1.0                 -nx, xmn, xsiz
100   1.0   1.0                 -ny, ymn, ysiz
 20   1.0   1.0                 -nz, zmn, zsiz
4  30                           -number of directions, number of h
1  0  1                         -ixd(1),iyd(1),izd(1)
1  0  2                         -ixd(2),iyd(2),izd(2)
1  0  3                         -ixd(3),iyd(3),izd(3)
1  1  1                         -ixd(4),iyd(4),izd(4)
1                               -standardize sill? (0=no, 1=yes)
1                               -number of gamma
1   1   1                       -tail variable, head variable, gamma type

Answer 1

这样的事可能会有所帮助。然后它可能不再是你正在寻找的。

fid = fopen(filename as a string);
n = 1;
textline = [];
while( ~feof(fid) ) // This just runs until the end of the file is reached.
    textline(n) = fgetl(fid)
    // some operations you want to perform?
    // You can also do anything you want to the lines here as you are reading them in.
    // This will read in every line in the file as well.
    n = n + 1;
end

fwrite(fid, textline);  // This writes to the file and will overwrite what is already there.
// You always write to a new file if you want to though!
fclose(fid);

我建议在这里使用fgetl的唯一原因是因为看起来根据线路或线路中的信息，您要进行特定的操作/更改。您也可以使用fread来执行相同的操作，但是在构建矩阵后，您必须在整个矩阵上进行操作，而不是在读取数据并构建矩阵时对其进行任何修改。 / p>

希望有所帮助！

基于以下评论的更完整示例。

fid = fopen('gam.txt');
n = 1;
textline = {};
while( ~feof(fid) ) % This just runs until the end of the file is reached.
textline(n,1) = {fgetl(fid)}
% some operations you want to perform?
% You can also do anything you want to the lines here as you are reading them in.
% This will read in every line in the file as well.

if ( n == 5 )  % This is just an operation that will adjust line number 5.
    temp = cell2mat(textline(n));
    textline(n,1) = {['newfile.name', temp(regexp(temp, '\s', 'once'):end)]};
end

n = n + 1;
end
fclose(fid)


fid = fopen('gam2.txt', 'w') % this file has to already be created.
for(n = 1:length(textline))
    fwrite(fid, cell2mat(textline(n));
end
fclose(fid)

Matlab：在不更改文件格式的情况下编辑文本文件中的值

1 个答案: