how to read from disk a text file containing columns of numbers and columns of characters

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Jack Cohen
Jack Cohen 2020-5-11
回答： Guru Mohanty 2020-5-14
I have on disk a .txt file, containing
a column of dates (23/2/20) and, two columns of integers.
As an example, the first 3 lines look like that:
23/2/20 190 11000
24/2/20 310 90
25/2/20 15 14000
How to read this file from disk ?
Thanks !
Jack
  2 个评论
Jack Cohen
Jack Cohen 2020-5-12
Not until now, but I can see I''ll do it ASAP !
Meanwhile, let me first to warmly thank you,for you help !
And also, could you solve for me the inverse problem:
Supposing I created in my editor a table file, containing 1 column of dates (12/05/2020 etc) and
3 columns of integers, how could I save this , as a disk file which can subsequently be printed ?
Thanks for your time and Best Regards,
Jack

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Guru Mohanty
Guru Mohanty 2020-5-14
Hi, I understand you are trying to read data from a txt file and store processed data in another txt file. You can do this using the following functions.
  1. importdata - To access data from a txt file
  2. fopen - To create a new file
  3. fprintf - To Write data in the text file.
Here is a sample code for it.
clc;clear all;
% File Read
filename = 'test.txt';
A = importdata(filename);
Dates=A.textdata;
Column1=A.data(:, 1);
Column2=A.data(:, 1);
% File Write
fid = fopen( 'results.txt', 'wt' );
for i = 1:length(A.textdata)
fprintf( fid, '%s %d %d\n', Dates{i}, Column1(i), Column2(i));
end
fclose(fid);

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