"MATLAB" reads and writes to a text file

In MATLAB, it is easy to read and write text files. Here's a quick introduction. If you have any other questions, please leave a message.

One, read the text file

Ideas:

1. Open a file handle with fopen

2, use Fgetl to get a line in the file, if the file has ended, Fgetl will return 1

3, use Fclose to close the file handle

For example, the contents of Tim_grid_data.txt are as follows:

0.1 0.1 151.031 -12.3144 -29.0245 3.11285 0.1 0.2  120.232 -2.53284 -8.40095 3.3348 0.1 0.3 136.481 -0.33173 -22.4462  3.598 0.1 0.4 184.16 -18.2706 -54.0658 2.51696 0.1 0.5 140.445 - 6.99704 -21.2255 2.4202 0.1 0.6 127.981 0.319132 -29.8315 3.11317 0.1  0.7 106.174 -0.398859 -39.5156 3.97438 0.1 0.8 105.867 -20.1589 - 13.4927 11.6488 0.1 0.9 117.294 -11.8907 -25.5828 4.97191 0.1 1 79.457  -1.42722 -140.482 0.726493 0.1 1.1 94.2203 -2.31433 -11.9207 4.71119

You can then use the following code to read the text file:

Fid=fopen (' Tim_grid_data.txt ', ' R '); Best_data=[];     While 1 tline=fgetl (FID);     If ~ischar (tline), Break;end tline=str2num (tline); Best_data=[best_data;tline];

End

Fclose (FID);

The contents of this text file are enrolled in the Best_data.

Second, write to the text file

Ideas:

1, open a file handle with fopen, but to use "w+" or "r+" and other modifiers, specifically see Help fopen

2. Write Data with fprintf

3, use Fclose to close the file handle

For example, the following program:

Fid=fopen (' Data.txt ', ' A + '); fprintf (FID, ' hello,tim\r\n '); fprintf (FID, ' http://blog.sina.com.cn/pengtim '); A=rand (1,10); fprintf (FID, '%g\r\n ', a); Fclose (FID);

Opening a Data.txt file, you can see:

Hello,tim http://blog.sina.com.cn/pengtim0.655741 0.0357117 0.849129 0.933993 0.678735 0.75774 0.743132 0.392227 0.655478 0.171187

So, using MATLAB to manipulate the text file is not very simple AH.

"MATLAB" reads and writes to a text file