Treatment G-code file

Hello,

I have a G-code file as you can see in the following structure :

How I can with matlab to find the number of rows which carry the character of Z and to copy the instructions between two defined rows in another file .txt.

Thank you

[Rik]

It sounds like you can just read this file as text and use contains to look for a Z.

[K. Taieb]

Thank you Rik

I think contains returns a logical value. I want to find his position. My goal is to copy the instructions after the line that contains z.

str = fileread('gcode.txt');
caracter = "Z";
TF = contains(str,caracter)

Answer 1

[Rik]

str = fileread('gcode.txt');
cell_str=strsplit(str,'\n')
character = 'Z';
TF = contains(cell_str,character);
line_num=find(TF);

[K. Taieb]

Thank you! That's exactly what I am looking for.

How I can copy the instructions that are between the two lines in another file.

[Rik]

Step by step: once you have the 2 line numbers that contain a Z, how can you generate the list of numbers in between? The colon operator should help you here.

Now that you have the data you want to put in your other file: how can you write data to file? That must be one of the most asked questions for Matlab.

[K. Taieb]

In the previous example, line_num = 1, 12

The idea is to concatenate the lines 2,3,4,5,6,7,8,9,10,11

but in the new file, we will have 10 lignes

[Rik]

That simply means you need to select your 10 lines from your current data:

new_txt=cell_str( (line_num(1)+1):(line_num(2)-1) );

Now you can print that text to your new file.

[K. Taieb]

Thank you!

[Rik]

You're welcome. If you feel my answer solved your question, please mark it as accepted answer. If not, feel free to comment with your remaining issues.

Answer 2

[Bjorn Gustavsson]

Maybe the easiest way it to loop through the text line-by-line and check if it contains the character 'Z' using strfind or findstr. Then it should be perfectly straightforward to keep the indices where you find your Zs.

HTH