MATLAB: Write an url list in one column of a text file

columnsfprintfhyperlinktext fileurlwebsave

I want to write a text.file with several columns. In the last one, I want to write an url so that ,when I open the text file and click on it, I get redirected to the website.

In the command window, this works:

disp('<a href = "https://www.mathworks.com">The MathWorks Web Site</a>')

But if I "fprintf" a string array of strings with that format, it writes the whole string on the file and doesn't create the hyperlink.

Also, "websave" doesn't work because I want to write other columns:

fprintf(fileID_diametros,'%10.1f\t %15.3f\t %19.3f\t %19.1f / %.1f\t %130s \n',[r1*2000;r0*2;esp_max;r1*2000;d_inteiro;rg_website]);

rg_website is the string array of urls.

How can I solve this?

Thank you in advance.

Best Answer

You cannot solve that. Text files do not have hyperlinks, they just have text.

If you write the whole thing in HTML standards then a browser might be willing to provide link services. If you write the whole thing using RTF then an editor might be willing to provide link services.

Plain text files do not have links or colors or fonts.

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MATLAB: How correctly use fprintf

Textfile Newlines

Try adding 't' to the fopen permissions string:

fid = fopen('test_t.txt','wt');

It is because the Windows newline actually consists of two characters, and simply using '\n' is not enough for some windows programs. The easiest solution is to add the 't' option to fopen, which makes this change automatically (for both reading and writing files). You might like to do this for all text files. You can read more about this in the fopen documentation.

fprintf Format String

%d is explained in the fprintf documentation as printing an "Integer, signed", which means it prints the numeric value provided as base-10 numeric digits in the file.

The MATLAB documentation is actually quite easy to read and navigate, you should try practice browsing it and try some of the examples that it includes!

Bonus Simplified Code

Note that you can simplify your code by removing the loop, because fprintf also works with arrays (but remember that MATLAB is column-major!):

>> testA =[1;2;3];
>> testB =[4;5;6];
>> fid = fopen('test.txt','wt');
>> fprintf(fid,'%d %d\n',[testA,testB].')
>> fclose(fid)

MATLAB: Download linked files on a webpage after using webread/urlread

Turns out, I can do this using webread, followed by HTMLTree, and then websave.

Best Answer

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