Thankfully, the minimum and maximum values of the chart axis are controllable using a UDF. For example, it is possible to change a worksheet’s tab color, or to change a chart title (next week’s post). Whether on purpose or by accident, Microsoft have made it possible to control various objects with UDFs. UDF’s are intended to be custom worksheet functions to calculate a cell value. User Defined Functions (UDFs for short) are just like normal Excel functions, such as VLOOKUP or SUM, but they have been created using VBA. Easily portable between different worksheets.no button clicking, but updates automatically when the worksheet recalculates Does not require user interaction – i.e.Updates automatically whenever data changes.If you’re not familiar with VBA, don’t worry, I’ll talk you through it step-by-step. Hopefully, by the end of this post, you too can share in the automatic cell linked bliss I now experience. Link that formula to a cell and suddenly it is possible to set the chart axis based on a cell value. Below you’ll find the result of that tinkering a formula which exists on the worksheet to control the min and max values of a chart axis. I turned to my old friend VBA, and started to tinker. I decided to build a more dynamic solution.
There are various chart objects we can link to worksheet cells source data, chart titles and data labels can all be linked to cells, but the chart axis is set by hardcoding a number into the Format Axis options window. It only takes a few seconds, but all that time starts to add up. It’s such a tedious task, and I know I’ll be doing it again at a future point.
“ Not again…” I think to myself every time I change the minimum and maximum values of a chart axis.
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