how to plot a graph WITHOUT y-axis

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Sat, 05/04/2013 - 07:08 am

hi all, I was wondering how to create a plot with no y-axis. I thought there will be a checkbox or something to turn off y-axis totally. BTW, I just switched from Origin to Igor on Mac, so I'm pretty new to this. Thanks.
You need to set the thickness of the Y axis to 0 and then turn the tick mark labels off. You can do this for the left axis with this command:

ModifyGraph noLabel(left)=2,axThick(left)=0


To generate the command from the Modify Axis dialog:
1. Double-click the left axis.
2. Click the Axis tab.
3. Set Thickness to 0.
4. Click the Label Options tab.
5. Choose Off from the Labels popup menu.

May 4, 2013 at 07:13 am - Permalink

thank you very much. that worked. one more thing though, I didn't figure out how to change the position of the 'bottom' axis. Say if my left is in the range of 0 to 10, and I want to put my bottom at 3 instead of 0, how should I do that? Thanks.

May 4, 2013 at 07:26 am - Permalink

This is what we call a crossing axis. To see the help for this execute:
DisplayHelpTopic "Creating Graphs"


You will need to recreate the graph to use free axes. An easy way to do this for an already-existing graph is to close the graph and create a recreation macro. Then change this:
Display yWave vs xWave // For example

to this:
Display /B=bottom2 yWave vs xWave


Then recreate the the graph by running the graph recreation macro. This will give you a free bottom axis. Double-click it and set to abut the left axis at the desired position.

I highly recommend that you do the first half of the Igor guided tour. It's essential for learning Igor and covers recreation macros, free axes and a lot of other Igor concepts that you need to know. Without doing the guided tour you will have to learn them the hard way. It will take an hour or two but will save a lot of time (and frustration) in the medium run.

May 4, 2013 at 07:43 am - Permalink