How to read a .dat file, containing binary data?

Question

Gargi 2014-8-8

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/146819-how-to-read-a-dat-file-containing-binary-data

评论： dhamini pasam 2016-1-7

采纳的回答： Iain

The file is very large and ve to read by plotting those binary data without changing it to decimal format.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Iain 2014-8-8

3
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/146819-how-to-read-a-dat-file-containing-binary-data#answer_147875

在 MATLAB Online 中打开

Ok. You need to open the file, for binary read access. Do that like this

fid = fopen('D:\myfile.dat','r');

Then, you need to read out what is in the file. You know the file format. You can only read out a number of bytes at a time. To read out one byte, and treat it like an unsigned 8 bit integer:

number = fread(fid,1,'*uint8');

To read out all the bytes as unsigned 8 bit integers:

numbers = fread(fid,inf,'*uint8');

That number(s) will print to screen in the range of 0 to 255. If you want to see the binary sequence that actually exists in RAM:

dec2bin(number)

To close the file:

fclose all;

3 个评论
显示 1更早的评论隐藏 1更早的评论

Iain 2014-8-11

在 MATLAB Online 中打开

Well, for example:

 fid = fopen('D:\myfile.dat','r');  % remember to change the filename to the file you actually want to read
 tenthousand8bitunsignednumbers = fread(fid,10000,'*uint8');
 fclose(fid);
 plot(tenthousand8bitunsignednumbers)

Gargi 2014-8-12

Thanku Sir, its working....!!!

Thanks & Regards

请先登录，再进行评论。

Answer 2

Azzi Abdelmalek 2014-8-8

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/146819-how-to-read-a-dat-file-containing-binary-data#answer_147868

在 MATLAB Online 中打开

fid= fopen('your_file.dat');
data=fread(fid);
fclose(fid);

3 个评论
显示 1更早的评论隐藏 1更早的评论

Azzi Abdelmalek 2014-8-8

Not working how? is there any error message? can you post your code?

Gargi 2014-8-8

Sir, the error msg m getting is as follows

Error using fread Out of memory. Type HELP MEMORY for your options.

Error in Untitled (line 2) data=fread(fid);

请先登录，再进行评论。

Answer 3

dhamini pasam 2016-1-7

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/146819-how-to-read-a-dat-file-containing-binary-data#answer_205376

在 MATLAB Online 中打开

close all; clear all; clc;

fx0 = fopen('sortedOFET.txt','r'); x0 = fscanf(fx0,'%f%f%f'); Ioff=fx0(:,1); Ion=fx0(:,2); gm=fx0(:,3); [a b]=size(fx0);

% % P3HT+CuTPP_TNT(75) j=2; k=1; for i=1:2:13 j=i+1; BEoff(k)=Ioff(i); AEoff(k)=Ioff(j); diffoff(k)=AEoff(k)-BEoff(k); peroff(k)=(diffoff(k)/BEoff(k))*100;

     BEon(k)=Ion(i);
     AEon(k)=Ion(j);
     diffon(k)=AEon(k)-BEon(k);
     peron(k)=(diffon(k)/BEon(k))*100;
     ratioBE(k)=BEon(k)./BEoff(k);
    ratioAE(k)=AEon(k)./AEoff(k);
    perratio(k)=((ratioAE(k)-ratioBE(k))./ratioBE(k))*100;
    BEgm(k)=gm(i);
    AEgm(k)=gm(j);
    diffgm(k)=AEgm(k)-BEgm(k);
    pergm(k)=(diffgm(k)/BEgm(k))*100;
     j=j+2;
     k=k+1;
 end
 peroff=peroff(:);
 peron=peron(:);
 pergm=pergm(:);
 perratio=perratio(:);
 diffoff=diffoff(:);
 diffon=diffon(:);
 diffgm=diffgm(:);
 data=[peroff peron pergm perratio diffoff diffon diffgm];
sir,this is my code and when i am trying to open it ,i am not able to execute it and i am getting error as follows what should i do?.
??? Attempt to execute SCRIPT on_off_gm_ratio_sortedOFET as a function:
D:\matlab codes\on_off_gm_ratio_sortedOFET.m
7.22E-09  2.99E-06  -1.99E-08
8.08E-08  3.49E-06  -1.77E-08
3.25E-09  1.99E-06  -9.30E-09
4.71E-08  2.40E-06  -1.92E-08
2.94E-08  2.81E-06  -1.31E-08
7.21E-08  2.39E-06  -1.80E-08
3.29E-08  2.39E-06  -1.11E-08
3.29E-08  2.39E-06  -1.20E-07
7.03E-08  5.21E-06  -1.86E-08
1.14E-07  5.30E-06  -7.40E-08
7.92E-08  4.71E-06  -2.05E-08
8.39E-08  4.82E-06  -1.50E-08