Manipulating a text file

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james flynn
james flynn 2017-4-7
评论： Walter Roberson 2017-4-10
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);

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采纳的回答

Walter Roberson
Walter Roberson 2017-4-7
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
james flynn
james flynn 2017-4-10
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:
1993 1 0.983 0.00 100.58 -3.04 264.11 24.73
1993 2 0.983 0.00 101.60 -3.16 251.00 25.75
1993 3 0.983 0.00 102.62 -3.27 237.82 26.76
1993 4 0.983 0.00 103.64 -3.39 224.65 27.78
1993 5 0.983 0.00 104.66 -3.50 211.48 28.79
Walter Roberson
Walter Roberson 2017-4-10
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);
Note: the code in the above form relies upon each line being exactly the same length and the column widths being exactly what your file has.

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