CSVWRITE Write Comma Separated Value (CSV) File

Section: Input/Ouput Functions

Usage

The csvwrite function writes a given matrix to a text file using comma separated value (CSV) notation. Note that you can create CSV files with arbitrary sized matrices, but that csvread has limits on line length. If you need to reliably read and write large matrices, use rawwrite and rawread respectively. The syntax for csvwrite is 
   csvwrite('filename',x)

where x is a numeric array. The contents of x are written to filename as comma-separated values. You can also specify a row and column offset to csvwrite to force csvwrite to write the matrix x starting at the specified location in the file. This syntax of the function is 

   csvwrite('filename',x,startrow,startcol)

where startrow and startcol are the offsets in zero-based indexing.

Example

Here we create a simple matrix, and write it to a CSV file 
--> x = [1,2,3;5,6,7]

x = 
 1 2 3 
 5 6 7 

--> csvwrite('csvwrite.csv',x)
--> csvread('csvwrite.csv')

ans = 
 1 2 3 
 5 6 7

Next, we do the same with an offset. 

--> csvwrite('csvwrite.csv',x,1,2)
--> csvread('csvwrite.csv')

ans = 
 0 0 0 0 
 0 1 2 3 
 0 5 6 7

Note the extra zeros.