Grapher does not currently support inverted or reciprocal axis scales. But, you can create an axis that has the desired look using a combination of linked axes and worksheet labels.
- Create the original scatter plot from the XY data in the worksheet by clicking the Graphs | Create | Basic | Scatter Plot () command. Select the data file and click Open.
- Click on the axis that should be inversed or the reciprocal of the current values.
- Click the Graphs | Add to Graph | Duplicate Axis command.
- Set the location for the duplicate axis and click OK. The duplicate axis is added to the graph.
- If you do not want to see the original axis, uncheck the box in the Object Manager next to the original axis.
- Click on the scatter plot to select it. Click the Graphs | Worksheet | Display command to open the worksheet that contains your plotted data.
- In a blank column, type the header X Value and then type the actual X values that are displayed as tick marks on the original axis. In the attached example, this is Column D.
- In the next blank column, type the header X Label.
- Click the Cells | Data | Transform command.
- In the Transform equation, type the equation E=round(1/D,2). The E is the X Label column letter. The D is the X Value column label. The 2 is how many digits you want to be displayed in the label. Click OK.
Type the X Value values into the column D.
Use the Transform command to generate the X Label values.
- Return to the plot window.
- Click on the second axis to select it.
- In the Property Manager, click on the Link Axis tab.
- Make sure that the axis is linked to the original axis. Set the Limits Y = F(X) = value to X.
- Click on the Tick Labels tab.
- In the Major Label Text section, change the Label source to From worksheet.
- Change the Worksheet to the worksheet that has the data and labels.
- Set the Data column to the column that contains the X Value, as defined in step 7.
- Set the Label column to the column that contains the X Label, as defined in step 8.
The duplicate top axis now shows the 1/X labels.
See the attached plot and worksheet for an example.
Updated September 30, 2016