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bumkim
Level II

Graph Builder: How to plot median(Rch) vs median(Cov) by group (LOT_WF)?

Hi

I’m trying to create a scatter plot in Graph Builder with:

  • X = Rch
  • Y = Cov
  • Group = LOT_WF

What I want is:

For each LOT_WF, a single point representing
(median(Rch), median(Cov))

So the final plot should have one point per LOT_WF, not raw data.


What I tried

  • Added Points element and changed Summary Statistic → Median
  • Used Overlay = LOT_WF

But the result still shows scatter points or only partially aggregated values.
It seems like Graph Builder is not aggregating both X and Y simultaneously by group.


My question

Is it possible in Graph Builder to:

Aggregate both X and Y as median by group
And directly plot (median(Rch), median(Cov)) as one point per LOT_WF

without creating a separate Summary table?


Additional context

I know I can achieve this using Tables → Summary, but I’m looking for a way to do it directly in Graph Builder for interactive analysis.

4 REPLIES 4
jthi
Super User

Re: Graph Builder: How to plot median(Rch) vs median(Cov) by group (LOT_WF)?

You can create new formula to your table or transform column within graph builder

1. Right click on LOT_WF -> Group By

2. Right click on Cov -> Aggregate > Median

3. Use that new column as your X-axis

-Jarmo
bumkim
Level II

Re: Graph Builder: How to plot median(Rch) vs median(Cov) by group (LOT_WF)?

Thanks, this was really helpful.

Re: Graph Builder: How to plot median(Rch) vs median(Cov) by group (LOT_WF)?

I would use Transform Columns within the Graph Builder. 

Using Car Phyical Data as an example: Create a scatter plot of, say, Horsepower vs Weight, with Overlay=Country. Notice that changing the scatterplot to Summary Statistic: Median does not work, just as you said. 

Now, right click on Weight -> Default Scope -> Overlay. This tells the Graph Builder that your next Transforms should be grouped according to the Overlay variable, Country. Next, right click Weight again and create a Median transform column. Repeat with Horsepower. Use these new Median(Weight) and Median(Horsepower) variables as your new X and Y variables. This should produce the desired plot. 

christianz_0-1776089119340.png --> christianz_1-1776089150798.png

Let me know if this works for you! 

(By the way, this is exactly the same as @jthi 's solution, except it is done within the Graph Builder instead of creating new columns in the data table)

bumkim
Level II

Re: Graph Builder: How to plot median(Rch) vs median(Cov) by group (LOT_WF)?

Thanks, this is really helpful. I can now analyze medians while switching overlays — this is exactly what I needed.

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