How to store char to a text file?

Hello,

I have the input text I want to save into a *.txt file.

Please see an example is in the included mat file.

It looks like this:

-------------------------------------

val =

av Gain Corrected [[%]] --> 0.32795 (-Fail-)

av Non Gain Corrected [[%]] --> 0.11452

P0 [count] --> 0

P1 [count] --> 1.0643

P2 [count] --> -1.1197e-05

P3 [count] --> 6.5011e-10

P4 [count] --> -1.5386e-14

P5 [count] --> 1.2889e-19

-----------------------------------

How can I store this variable (only the bold test) into *.txt file, so it will maintain all the "next line" / special charachters, etc..

I've attached a required_output.txt (created by a simply copy-paste).

* I've tried several solutions suggested on the web, but each time something else is messed up... :(

** Using MATLAB 2015b (for legacy reasons, can't advance to any newer versions)

THANKS!!!

Answer 1

[Mathieu NOE]

hello Mark

try this ; your char array must be first transformed in string , otherwise this code will not work

hope it helps

load('input_text.mat')

filename_out =   'output.txt';      
fid = fopen(filename_out, 'w' ); %// open file to writing
fprintf( fid, '%s\n', string(results_txt) ); %// print string to file
fclose( fid ); %// don't forget to close the file
disp(['File :' filename_out ' has been saved.']);

File :output.txt has been saved.

type('output.txt')

av Gain Corrected [[%]] --> 0.32795 (-Fail-)
av Non Gain Corrected [[%]] --> 0.11452     
P0 [count] --> 0                            
P1 [count] --> 1.0643                       
P2 [count] --> -1.1197e-05                  
P3 [count] --> 6.5011e-10                   
P4 [count] --> -1.5386e-14                  
P5 [count] --> 1.2889e-19                   

[Mark Golberg]

@Mathieu NOE thank you.

unfortunately I get the following error:

--------------------------------------

Error using string

string is obsolete and will be discontinued. Use char instead.

----------------------------------------

If I use "char" instead (although, my test is originally char) I get a one long line of gibrish...

Something like that:

----------

aaPPPPPPvv012345 GN[[[[[[aoccccccinoooooon uuuuuu GnnnnnnCattttttoi]]]]]]rn r ------eC------co>>>>>>tr er01-6-1de .1.1. c 0.5.2[t 61058[e 41138%d 39189] 7e6e][ e-e- [ -1-1-% 0019-] 5 4 >] 0- .- 3> 2 70 9. 51 1 (4 -5 F2 a i l - )

-------------

How did you manage to get such a nice output file? Am I missing something?

[Mathieu NOE]

yes , seems TMW has for some obscur reasons decided that strings are not anymore up to date

(I am running R2020b so it's still doable)

try with a quite old function dlmwrite , it still works for me

filename_out =   'output.txt';      
dlmwrite(filename_out,results_txt,'delimiter','');
type('output.txt')

[Walter Roberson]

string objects did not exist in the user's old version.

[Mathieu NOE]

@Walter Roberson

thanks for the clarification, I was myself puzzled that strings would disappear

[Mark Golberg]

@Mathieu NOE

with dlmwrite it worked perfectly.

THANK YOU !!!

[Mathieu NOE]

My pleasure !

Answer 2

[Walter Roberson]

fopen the file with 'w' access. fwrite() the character vector. fclose()