In Qgis2.6. I want to create a pie chart to summarize the layer data. I have a layer of land use polygons (woodland, agricultural, urban etc.). I want a pie chart to show the % of each land use in the layer. I see the diagrams section of layer properties will provide pie charts for each polygon, and the 'Group Stats' plugin will calculate the totals I need. All tantalizingly close. Does anyone know of a way this can be done?