# Selecting Chart Point with None Value

**URL:** <https://forum.inductiveautomation.com/t/selecting-chart-point-with-none-value/1328>\
**Category:** Archived Topics\
**Created:** [October 12, 2009, 6:29pm UTC](https://forum.inductiveautomation.com/t/selecting-chart-point-with-none-value/1328 "2009-10-12T18:29:40Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Jonathan](https://avatars.discourse-cdn.com/v4/letter/j/aeb1de/32.png) [@Jonathan](https://forum.inductiveautomation.com/u/Jonathan)\
**Post date:** [October 12, 2009, 6:29pm UTC](https://forum.inductiveautomation.com/t/selecting-chart-point-with-none-value/1328/1 "2009-10-12T18:29:40Z")

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After creating multiple datasets on a chart to achieve overlay the selection of a data point no longer works. In order for the category axis to match up I had to place None rows for the datasets to have equal lengths. Now when I click on a point it will not show as being selected and the selectedData property returns the last row in the data set with None no matter where I click on the graph. Is there any way to control which datasets can be selected and which ones cannot?