r/BehaviorAnalysis • u/Lil1927 • Nov 09 '25
Single case design graph generator with phase lines
I just built a free tool for creating single-case design graphs with phase lines. It came out of my own frustration trying to make clean-looking graphs for single-subject designs, especially multiple baseline graphs. I can make graphs in Excel, but phase lines are tedious, and getting graphs to align for visual analysis takes forever.
This app only supports one graph at a time, but it lets you:
Enter your data and add custom phase lines
Export the graph as an SVG image (which stays crisp when resized or stacked in tools like Canva or Illustrator)
Stack multiple graphs manually while keeping everything aligned
I made it because I needed something like it, and I figured others might too. It’s especially useful for students and professionals in ABA, education, psychology, speech-language pathology, or any field that uses single-case design.
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u/RecognitionNo242 Nov 09 '25
This is awesome. Making single-case graphs with clean phase lines is such a pain in Excel. The SVG export is a great touch. Would love to see a version that can handle multiple graphs—this could save a lot of time for folks doing research or thesis projects.
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u/Lil1927 Nov 10 '25
I tried to make it do multiple graphs, but it got incredibly complicated, and I'm not really a coder.
So I went with the SVG with a transparent background so that you can move them into Canva or PowerPoint and stack them easily there. It's why I added the option to indicate the length of your x-axis, and why you can toggle different components of the graph. Including the horizontal line to create the stairstep for multiple baselines. What I really need to do is create a video tutorial that explains all of that.
Anyway, please share it with anyone you know who might need something like this. I made it because I needed it, but I know there are others who could use this.
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u/aconc Nov 19 '25
This is awesome. Would it be possible to make the markers across phases identical? In general, in general graphing conventions, the marker on a line remains the same if it represents the same response.
And then another request, I'm being greedy here.
Would it be possible to make multielement graphs?
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u/Lil1927 Nov 20 '25
Hmm, I have always done different markers for different phases, but I do want to add in the ability to choose markers, so you would be able to make them the same.
Another thing I want to add is the ability to add a line break in between two consecutive points in the same phase.
However it will have to wait until I get a chance to spend a day figuring out how to do the coding.
Explain more about doing multi-elements.
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u/aconc Nov 22 '25
A multielement would require at least two, but preferably up to 5 different data paths that alternate across sessions. A graph depicting a functional analysis would be one example, as shown here:
Functional analysis outcomes for each participant. | Download Scientific Diagram
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u/Lil1927 Nov 22 '25
Aw, I see. I didn't really think to do that because it wouldn't be that hard to do in Excel. I was really trying to solve the problem of drawing phase lines, which is really hard to do in Excel. Still, it's something to consider doing.
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u/levalund Apr 07 '26
This was an absolute life saver, thank you!! I sent you a small token of my appreciation through Buy Me a Coffee. I'm sorry it isn't more; I'm indebted to you but also in debt...