How to convert a .mat file into tab separated .txt file?

Hello Friends,

I have a data matrix of real entries. I saved this matrix in MATLAB Workspace as .mat file. I want to convert it to tab separated .txt file. For this I tried the following:

load('myFile.mat')

dlmwrite('myFile.txt', myFile, 'delimiter','\t')

it does create a text file which is in notepad with name myFile.txt, however, this .txt file puts all the elements of the 1st row, 2nd row, 3rd row, etc. in one row. I do not even understand what it does. I just wanted it to remain in the same way as before, but just with tab separated and in .txt.

Though when I type the following command, it shows tab separated columns as I wanted in Command Window:

type('myFile.txt')

Please advise!

[Stephen23]

The problem is Notepad does not interpret newline-only files as newlines, but requires carriage return+newline (the PC standard). You can read more about newline standards: note that Notepad does not interpret non-PC newlines, but that Wordpad does.

Answer 1

[hello_world]

I found the answer to my own problem. I should have added 'newline','pc' in my command, i.e.,

dlmwrite('myFile.txt', myFile, 'delimiter','\t','newline','pc')

This gives the desired result.

[Veizal Rasyid]

PC refer to? is name of the computer administrator? how about delimiter, what is that? and new line refer to? explain that please.

[Walter Roberson]

'delimiter', '\t' means to use tab between the fields instead of comma or space.

'newline' is how the end of a line should be indicated in the file. 'pc' here means "personal computer", as in "IBM PC", as compared to Unix system. The convention for old DOS and Windows systems was that each line had to be ended with Carriage Return (char(13), '\r', control-M) followed by New Line (char(10), '\n', control-J); the convention for Unix systems and newer MS Windows programs is that each line should be ended with just New Line (char(10), '\n', control-J)

[khadicha amonova]

I downloaded data from Physionet in a format .mat(ECGData.mat). Now I want to convert it to txt format.But I don't know its structure(i.e. how many row and column).So I tried code like this.:

(in the photo below ) And error occured like in the photo below.

please. Can someone give me idea what to do now

[Walter Roberson]

It would be easier if you could name a particular file that you downloaded, so that we can be sure we are giving you information about the format of that particular databank.

What you have now is a struct, not a numeric array, but I do not know what the struct contains at the moment.

[khadicha amonova]

I downloaded github/mathworks/physionet ECG data/

and the file in zip folder named ECGData.mat

it is 1x1 struct with 2 fields

Data 162x65536 double

Labels 162x1 cell

[Walter Roberson]

Labels = ECGData.Labels;
Data = ECGData.Data;
T = table(Labels, Data);
writetable(T, 'ECGData.csv', 'WriteVariableNames', false);

This will create a .csv file in which the first column is the text label, and the remaining 65536 columns are the numeric values.

Note that this .csv file cannot be loaded into Excel, as Excel has a limit of 16384 columns.

If you wanted to get something that could be loaded into Excel, you will need to describe the format that you want for your text file.

[khadicha amonova]

thank you a lot

Answer 2

[Neha Chaudhary]

Nr=input('Enter no of antennas (Nt = Nr):');
Nt=Nr;
Sigma=input('0.1:1');
Pt=input('enter total power')
X=(2*randi(4,[Nt,1])-5)+i*(2*randi(4,[Nt,1])-5)%input signal*16QAM
H=(randn(Nt,Nr)+i*randn(Nt,Nr))/sqrt(2)%channel matrix H
N=(Sigma/sqrt(2))*(randn(Nt,1)+i*randn(Nt,1));%Noise matrix with variance sigma 
Y=H*X+N;%output
G=inv(H'*H+Nt/Pt*eye(Nt))*H'%Pseudo inverse matrix
z=G*Y;%estimated input 
Z_cap=1+2*floor(real(z)/2)+i*(1+2*floor(imag(z)/2))%slise(z)
Z_cap-X

[Walter Roberson]

Yes? What about this code?

Answer 3

[Neha Chaudhary]

X=(2*randi(4,[Nt,1])-5)+i*(2*randi(4,[Nt,1])-5)%input signal*16QAM
dlmwrite('myFile.txt', myFile, 'delimiter','\t','newline','pc')