How to implement text manipulation with Matlab

Editor to share with you how to achieve Matlab text operation, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to understand it!

1. Fopen and fprintf function fopen ()

Fopen () is a function that reads data into matlab in the specified format. The common calling format is:

Fid=fopen ('filename','permission') or fid=fopen (' filename')

Where fid is the file handle, filename is the file name to be opened, and permission is opened. The default opening method is "read-only". After using fopen (), a file code is returned to the fid variable by default. The return value is usually as follows:

Fid=+N (N is a positive integer): indicates that the file was opened successfully, and the file code is N.

Fid=-1, indicating that the file failed to open. File ID is always valid until this file is closed.

Permission is the parameter for the opening method:

R: read out

W: write (automatically created if the file does not exist)

A: subsequent writes (automatically created if the file does not exist)

Ringing: read and write (the file should already exist)

Write refresh: refresh the write (automatically create the file if it does not exist)

Awrite: subsequent writes (automatically created if the file does not exist).

W: rewrite, but not automatically refresh

A: subsequent writes, but not automatic refresh

Rt: open text to read in text format

Wt: open a file to write in text format

Fprintf

The fprintf () function can write data to a specified text file in a specified format, in the following basic format:

Fprintf (fid,format,A)

Fid is a file handle, obtained from the fopen () function, and format is used to specify the format in which the data is output:

% d: integer

% e: real number: scientific calculation form

% f: real number, decimal form

% g: one of the above two formats is automatically selected by the system.

% s: output string

A: the matrix used to store data.

A certain amount of fighting

Fid=fopen ('d:\ char.txt','w')

Fprintf (fid,'%s',a)

Fclose (fid)

Method 1. Write matlab data to txt document: fid = fopen ('data.txt','wt');% data.txt is written file name matrix = yCopy;% M is the matrix to be stored [m _ matrix _ n] = size (matrix); for i=1:1:mfor j=1:1:nif _ j _ memory _ fprintf (fid,'%f\ n memory matrix (iMagnej)) Else fprintf (fid,'%f\ nfid); endendendfclose (fid); method 2: fid = fopen ('data.txt',' wt'); mat = Mscape for I = 1:size (mat, 1) fprintf (fid,'%f, mat); fprintf (fid,'\ n'); endfclose (fid) The above is all the content of the article "how to manipulate the text in Matlab". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!