Downloading your data to a file
First, click on the data tab. It should look something like this:

To download your data, click on the 'Download Data' link. Your browser will prompt you to either save the data to a file or open it in a program. Either will work just fine. You can open the file in a spreadsheet program such as Excel or Open Office, or any text editor.
File Name
The file name is shown right under the 'Download Data' link on the Data tab. In the image above, it's plotomatic_dataset_32.csv.
Yours will have a different dataset number (32, in this example). You can see the dataset number for your dataset by looking at the address bar in your browser. For dataset 32, the address will be: http://www.plotomatic.com/edit/32.
Data Format
For a dataset with data that looks like this:

The downloaded file will look like this:
- x,y,z
- 0,0,0
- 1,1,1
- 2,4,8
- 3,9,27
- 4,16,64
If your data has empty data points, like this:
The downloaded file will look like this:
- x,y,z
- 0,0,0
- 1,1,1
- 2,4,8
- 3,9,27
- 4,16,
- 5,25,125
- 6,,216
- 7,49,
- 8,,512
And that's about all there is to it!
