January 30, 2024 at 6:13 pm
#10512

Bill Finzer

Keymaster

Hello,I’m sorry to say that CODAP does not have the ability to create the plot you want. If it had a function, let’s call it the “normalQuantile” function, we could do the following:

- Compute the mean, standard deviation and count of the given data at the “parent” level of the dataset.
- Sort the values in the dataset in ascending order.
- Compute the percentile of each value using (caseIndex – 0.5) / count
- Use the normalQuantile function to compute the value we would expect from a normally distributed random variable for each percentile.
- Then we could plot the dataset values on the y-axis and the computed “normal quantile” values on the x-axis and we would have the desired plot.

But, as mentioned above, CODAP does not have the necessary normalQuantile function. But there’s no reason it couldn’t, so I’ll add that function as a desired feature.Thanks for your interest in CODAP!Bill