The difference between the LOG and LOG10 functions in Microsoft Excel is that LOG returns the logarithm of a number to the base you specify, and LOG10 returns the base -10 logarithm of a number.

Excel defaults to a linear scale for graphs, but you can easily change it to logarithmic to suit wide data ranges or logarithmic phenomena. The Chart Wizard produces graphs with linear scales.

Discover what a log-normal distribution is, its financial applications, and how to calculate it, including using Excel for ...