Could someone please explain to me how to take characters from a text file and put it in MATLAB?

So I've tried using fscanf and sscanf to take a group of words and numbers and put them into a cell array. An example of what I want in the array is "Wind data AA0, #2". I am new to MATLAB, so I've had problems getting the words I see in my text file to MATLAB using the right code. Could someone give me an example of how this is done? My attempt:

>> fileid = fopen('myfile.txt'); 
>> a = fscanf(fileid,'%g %g',[35 inf]) % I need only to row 35 % don't understand "%g" part
>> a = a';  % I saw that I might need to transpose it
>> fclose(fid)

[per isakson]

"don't understand "%g" part" &nbsp %g converts text to floating point, see fscanf, Read data from text file. %g in combination with "Wind data AA0, #2"* doesn't make sense.

Proposal: Upload myfile.txt and describe the output you are looking for.

[Tony Pate]

I used

 >> fid = fopen('MLsensLiftStart.txt');  % open file 

 >> CStr = textread('MLsensLiftStart.txt','%s','delimiter','\n','whitespace',' ');

to read it into Matlab. I would like to capture only the first 35 rows and I want the format of my array to match the text file. The file is too large, but here is an example of the first part.

[Geoff Hayes]

Tony - what is the format of your array? You mention that you would like to capture only the first 35 rows but these seem to have a consistent format. Or do you mean to say you want all rows after row 35?

[Tony Pate]

I figured out that a textscan would be more appropriate for creating a cell like I want.

>> fileID = fopen('MLsensLiftStart.txt','r');

>> Intro = textscan(fileID,'%s',35,'Delimiter','\n');

Using this code, I got what I needed out of the file. I have one more question, though if anyone could please help. I need to create a structure array that organizes my cell data. It is all being stored in a 35x1 cell, but I need each of the 35 rows to have individual names and be easily seen when I open the cell.

[per isakson]

The file, MLsensLiftStartexample.txt, is uploaded twice. The two copies are identical(?). It contains 13 rows and the longest is 7060 bytes. It's tab delimited. It contains 1(row header) + 72(data) columns.

&nbsp

• "I need to create a structure array" &nbsp Structure field names may be created based on the row headers in the first column. (Alternatively, the row headers may be used as key values of a containers.Map object.)
• I imagine that you want a scalar, a&nbsp<1x1 struct>, structure. However, a&nbsp<1x72 struct> is an alternative.
• "individual names and be easily seen" &nbsp asks for a table object.

Describe the structure you want.

Answer 1

[Stephen23]

This code will read in the whole file (well, it works on your sample file):

fid = fopen('MLsensLiftStartexample.txt','rt');
hdr = fgetl(fid);
txt = fgetl(fid);
pos = ftell(fid);
N = numel(regexp(fgetl(fid),'[^\t]+','match'));
fmt = repmat('%s',1,N);
fseek(fid,pos,'bof');
C = textscan(fid,fmt,'Delimiter','\t');
fclose(fid);
C = horzcat(C{:});
N = str2double(C);

Have a look at the variable C: all of the data is there, and the equivalent numeric in N (where appropriate).

[James Chukwuemeka Agada]

Would this be able to work with a gcode text file?

Trying to extract the X Y Z I J values from it

attached the txt file