## 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.