# Diagrams

Diagrams are charts which are based on the data available in the report. Here, you need to be careful because even if a diagram is put into a band, the data used in this diagram is taken from the entire report. To be able to draw a diagram just based on the data available within one band, you need to manipulate the filter of the diagram by script, best done with the Before Print event.  

<figure><img src="http://aquawiki.andagon.com/pictures/drex_diagrams_2_custom.png" alt=""><figcaption></figcaption></figure>

**Example: Number of defects by significance**

<figure><img src="http://aquawiki.andagon.com/pictures/drex_diagrams_2_custom_2.png" alt=""><figcaption></figcaption></figure>

* The connection of data with diagrams is established with rows
* Every row contains a grouping argument (x-axis) and a value (y-axis) which is normally calculated with a sum function&#x20;
* For the use of 2D diagrams, you can define several rows.&#x20;


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