How to edit text file in matlab?

Hi Everyone,

I have a text file having Gcode in it. I want to change the Gcode into a matlab readable file(.m) e.g I have these two line in .txt file:

G1 X138.22 Y13.96 F3500.00
G1 X138.22 Y153.50 F3500.00

I want to edit these two line and make it like as shown below:

G1 = [138.22 13.96]
G2 = [138.22 153.50]

I have another text file having the Gcode of about 100+ lines. So, I am looking for a matlab function that does this automatically without having to change my file manually.

Thank you

Answer 1

[Bob Thompson]

I don't know that it is worth the effort to actually edit a text file with MATLAB, but it is certainly possible to read it, edit the values in MATLAB, and then create a new version of the file.

fid = fopen('myfile.txt');
text = textscan(fid,'%s','delimiter','\n');

% You will need to adjust this to fit more than your example
lines = find(cellfun(@(x) strcmp(x(1),'G'),text)); % Looking for lines which start with G. This may not work
for i = 1:length(lines);
    nums = regexp(text{lines(i)},'G\d+ X(\d+.\d*) Y(\d+.\d*) .*','tokens'); % Locate numbers in line
    coords = [str2num(nums{1}{1}) str2num(nums{1}{2})]; % Convert to numbers from strings
    text{lines(i)} = [text{lines(i)}(1:3),' = [',num2str(coords),']']; % Replace the line with new format
end

fclose(fid);
fid = fopen('myfile.txt','w'); % Open as writable file (overwrites old stuff)**************
fprintf(fid,'%s\n',text{:});
fclose(fid);

[Zain Shahwar]

THank you very much for your help. I applied that method with little errors it worked fine.

I have also found one solution, I imported .txt file from matlab import data tool and sorted the file through that and generated a script file.

Now I am able to convert every single column (numeric text) into numbers. I have attached the script file "Untitled_new.m". Please have a look.