Click on the graph axis you want to change to a logarithmic scale. Note that by clicking on different parts of the chart, you can select the whole chart, the plot area only, the legend or each axis.

There is disagreement on the proper way to label logarithmic scales in charts and graphs, especially when the base is not 10. This post shows several alternative ways of labeling log scales ...

Launch Excel and load the spreadsheet containing the data you want to plot. Select the first set of X and Y axis data for your chart. Click the "Insert" tab, and then select the chart type and sub ...