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excel

ResolvedVersion 2003

Stephen has attended:
Excel Intermediate course

Excel

Could you explain in simple terms how the logarithmic scale (in charting) is calculated and when it is most appropriate to use?

RE: Excel

Hello Stephen,

Hope you enjoyed your Microsoft Excel course with BEST STL Training.

Thank you for your question regarding logarithmic charts.

Simply put, it is a chart for which the scale (usually on the vertical axis) is skewed so that a given distance always represents the same percentage change, rather than the same absolute change (as is the case for a linear chart). In other words, the distance from 1 to 10 is the same as the distance from 10 to 100 on a logarithmic chart, but the latter distance is ten times greater on a linear chart.

Any value axis can be turned into a logarithmic scale axis. This includes any Y axis, and the X axis from an XY Scatter chart. If you have a Line chart, you must convert it to an XY Scatter chart before changing the axis to logarithmic. Double click on the axis, and click on the Scale tab. If it says Category Axis Scale under the tabs, you cannot convert the axis without changing the chart type. If it says Value Axis Scale just under the tabs, you will also see a Logarithmic Scale checkbox near the bottom. Check this checkbox, and set appropriate scaling parameters.


I hope this resolves your question. If it has, please mark this question as resolved.

If you require further assistance, please reply to this post.
Or perhaps you have another Microsoft Office question?

Have a great day.
Regards,

Richard
Microsoft Office Specialist Trainer

Excel tip:

Fill formulae across a sheet

To copy a formula down a spreadsheet where there is data underneath, to the left or to the right of the formula, double-click on the fill handle. The fill handle is the little black cross that appears in the bottom right-hand corner of the formula cell. Unfortunately, no similar facility exists to copy formulae across the sheet.

One reasonably quick way to copy an existing formula across a sheet is to select the formula and the cells on the right to which you want to copy it. Then press Ctrl+R to copy the formula across the selected range, or, if you are menu-minded, use the Edit|Fill|Right command.

View all Excel hints and tips

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