===Writing the Script - The Report Class===

From the [[writing the script2|previous page]], we've seen that most of the work will be in filling-in the **draw** function.

The function is passed an array of data, but we don't really know what any of it **is** and what we're supposed to do with it.

Luckily, the **Report** class we're using has a few extra variables we can access...

==columns==

A list of column information - particularly, the column //name//. This information is in the same order as the values passed in the parameter to the **draw** function.

==data==

A copy of the historical data. These are the same values that are usually passed to the **draw** function on historical graphics.

==livedata==

A copy of the most recent live data. These are the same values that are usually passed to the **draw** function on live graphics.

==margin==

An object containing the **top**, **bottom**, **left** and **right** margins for our graphic, if we want to avoid being too close to the page edges.

Using the margin also helps you avoid any headings or controls that are added above the Infographic.

==sizing==

An array containing the ideal width (index 0) and height (index 1) of the graphic.

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Let's begin by [[writing the script4|creating a bar-chart of our temperatures]].