Manipulating a text file

Question

james flynn 2017-4-7

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/334256-manipulating-a-text-file

评论： Walter Roberson 2017-4-10

1959-2019Jupiter.txt

Hi all. I am trying to replace one of the columns within my text files with a column of zeros. I have been trying to do this by reading each of the columns in the file, replacing the desired column with a matrix of 0's and then writing this to a new file. When running the code the following error is produced which i havent seen before:

Error using horzcat Dimensions of matrices being concatenated are not consistent.

Error in ZlessData (line 13) J = [J1 J2 J3 J4 J5];

Here's the code and data file. Can anyone help?

function ZlessData
Jupiter = dlmread('1959-2019Jupiter.txt');
J1 = Jupiter(:,1);
J2 = Jupiter(:,2);
J3 = Jupiter(:,3);
J5 = Jupiter(:,5);
x = (size(Jupiter,1));
J4(1,x) = 0
J = [J1 J2 J3 J4 J5];
fidJ = fopen('1959-2019JupiterZless','w');
fprintf(fidJ, '%f %f \r\n', [J]');
fclose(fidJ);

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2017-4-7

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/334256-manipulating-a-text-file#answer_262228

在 MATLAB Online 中打开

function ZlessData
Jupiter = dlmread('1959-2019Jupiter.txt');
J = Jupiter;
J(:,4) = 0;
fidJ = fopen('1959-2019JupiterZless','w');
fprintf(fidJ, '%f %f \r\n', [J]');
fclose(fidJ);

2 个评论
显示无隐藏无

james flynn 2017-4-10

在 MATLAB Online 中打开

Thank you. However, it still changes the layout of the document into what seems to be like a continuous string of data. I require the document to have the data layed out in rows like this, as it is in the original document:

 1  0.983   0.00  100.58   -3.04  264.11   24.73
 2  0.983   0.00  101.60   -3.16  251.00   25.75
 3  0.983   0.00  102.62   -3.27  237.82   26.76
 4  0.983   0.00  103.64   -3.39  224.65   27.78
 5  0.983   0.00  104.66   -3.50  211.48   28.79

Walter Roberson 2017-4-10

在 MATLAB Online 中打开

S = fileread('1959-2019Jupiter.txt');
linelen = find(S==10,1,'first');
Scol = reshape(S, linelen, []).';
Scol(:,18:19) = ' ';
Scol(:,20:23) = '0';
Scol(:,21) = '.';
fidJ = fopen('1959-2019JupiterZless.txt','w');
fwrite(fidJ, Scol.');
fclose(fidJ);