D3 video tutorial 10 - loading external data...

Data not normally hard coded.

Load external files.

Stored in the same folder as the index.html

Fetching data:
depends on the format:
json format -
d3.json("mydata.json", function (data) {code}

First argument is the path to the file.
Second argument - what must happen once the data is loaded.
   - this will be a function - "call back function"
   - all the code that depends on the data should be stored here!


Some good information here.

How to add text to our bar chart is covered and merits some revisiting.