如何在MATLAB中的.txt文件中保存数据

Question

我有3个txt文件s1.txt, s2.txt, s3.txt.每个都有相同的格式和数量的数据.我想只将3个文件中每个文件的第二列合并为一个文件.在我合并数据之前,我根据第1列对其进行了排序:

UnSorted文件:s1.txt s2.txt s3.txt

1 23     2 33    3 22 
4 32     4 32    2 11
5 22     1 10    5 28
2 55     8 11    7 11

排序文件:s1.txt s2.txt s3.txt

1 23     1 10    2 11 
2 55     2 33    3 22
4 32     4 32    5 28
5 22     8 11    7 11

这是我到目前为止的代码:

BaseFile ='s'
n=3
fid=fopen('RT.txt','w');
for i=1:n
  %Open each file consecutively 
  d(i)=fopen([BaseFile num2str(i)'.txt']);

  %read data from file
  A=textscan(d(i),'%f%f')
  a=A{1}
  b=A{2}
  ab=[a,b];

  %sort the data according to the 1st column
  B=sortrows(ab,1);

  %delete the 1st column after being sorted
  B(:,1)=[]

  %write to a new file
  fprintf(fid,'%d\n',B');

  %close (d(i));

  end    
fclose(fid);

如何以这种格式获取新txt文件中的输出？

23 10 11 
55 33 22
32 32 28
22 11 11

而不是这种格式？

23    
55    
32   
22
10    
33
32
11
11
22
28
11

Answer 1

首先创建输出矩阵,然后将其写入文件.

这是新代码:

BaseFile ='s';
n=3;
for i=1:n % it's not recommended to use i or j as variables, since they used in complex math, but I'll leave it up to you

    % Open each file consecutively
    d=fopen([BaseFile num2str(i) '.txt']);

    % read data from file
    A=textscan(d,'%f%f', 'CollectOutput',1);

    % sort the data according to the 1st column
    B=sortrows(A{:},1);

    % Instead of deleting a column create new matrix
    if(i==1)
        C = zeros(size(B,1),n);
    end

    % Check input file and save the 2nd column
    if size(B,1) ~= size(C,1)
        error('Input files have different number of rows');
    end
    C(:,i) = B(:,2);

    % don't write yet
    fclose (d);

end

% write to a new file
fid=fopen('RT.txt','w');
for k=1:size(C,1)
    fprintf(fid, [repmat('%d\t',1,n-1) '%d\n'], C(k,:));
end
fclose(fid);

编辑: 实际上只将数字写入您不需要FPRINTF的文件.请改用DLMWRITE:

dlmwrite('RT.txt',C,'\t')