Find out how to Create Log and Semi-Log Graphs in Excel?


Semi-log and log-log graphs are helpful instruments for analyzing and discovering exponential and energy operate relationships. Logarithmic graphs have the flexibility to provide you a perspective of a relationship between your knowledge that’s not apparent on a plain graph.

Whereas a quasi-log graph is logarithmic on just one axis, a log-log graph is logarithmic on each axes. Every of those graphs has its personal makes use of. With Excel, you’ll be able to create semi-log and log-log charts and graphs with a number of clicks to additional analyze your knowledge. Learn on to be taught how one can create such graphs in Excel.


Find out how to Create a Semi-Log Graph in Excel

A semi-log graph is a graph that has one of many two axes on the logarithmic scale. Usually, the Y-axis is logarithmic. Which means the y-axis grid traces will likely be exponential, whereas the x-axis gridlines will stay as effectively.

For example, on this spreadsheet, we’ve the variety of cells within the cell tradition atmosphere in an experiment on completely different days. The aim is to plot this knowledge on a semi-log graph. In case you are not aware of creating graphs in Excel, learn our article on Find out how to Create Graphs in Excel to get an excellent understanding of the method.


  1. Choose all the desk. these cells will likely be A1 To B7 on this occasion.
  2. go to insert Menu.
  3. From Chart part, click on Enter a scatter (X, Y) or bubble chart,
  4. to pick Scatter with clean traces and markers,

You now have a scatter chart of your knowledge. Now it is time to make it a semi-log.

  1. Choose the chart you simply created.
  2. Double-click the Y-axis.
  3. In format axis proper aspect panel, go to axis choices tab.
  4. In axis choicesthe inspection logarithmic scale,

You have got a semi-log graph! Notice that the graph is now a straight line.

You may also change Aadhaar from the default 10 to every other quantity that fits you higher. It’s because the variety of cells within the knowledge desk was exponential, as they’re really powers of six. You’ll be able to additional enhance the readability of your graph by altering the logarithm base from 10 to six.

Find out how to Create a Log-Log Graph in Excel

A log-log graph is a graph that has each axes on a logarithmic scale. So once more, the grid traces for each the X and Y axes on this graph are exponential and unequal. Let’s examine the log-log graph in motion with an instance.

In the same instance, we’ve cell counts on completely different days, however this time the times are additionally exponential. Such an information desk virtually begs for a log-log graph.

As within the earlier instance, choose the desk and create a scatter chart for it. If you wish to be taught extra about scatter charts, learn our article on Find out how to Create Scatter Plot in Excel, what precisely it’s and when you must use it.

After you’ve gotten created the scatter plot, change the Y-axis to log the tactic you discovered within the earlier part. You’ll be able to see that the graph remains to be not a straight line. It’s because the x-axis (the day quantity on this instance) can be exponential.


  1. Choose Chart.
  2. Double-click the X-axis.
  3. From format axis panel, click on axis choices,
  4. Underneath Axis Choices, examine logarithmic scale,

Now each your axes are on a logarithmic scale, and you’ll see that your graph has additionally grow to be a straight line. It’s because the information on each axes are exponential.

Provided that the information on the x-axis are all powers of two, altering the logarithm foundation to 2 will provide you with a greater picture of this graph.

logarithmic graphs in excel

Semi-log and log-log graphs are helpful properties that may assist you to uncover new relationships between your knowledge. These instruments are broadly utilized in a wide range of fields, and though not instantly seen in chart settings, Excel can be able to producing semi-log and log-log graphs.

Now that you know the way to create semi-log and log-log graphs in Excel, it is time to use these graphs and have a look at your knowledge from a brand new perspective.



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