topic Re: Trying to create a binary logistic regression that accounts for repeated measures in Discussions

Trying to create a binary logistic regression that accounts for repeated measures

rhammock — Fri, 09 Jun 2023 00:38:54 GMT

I am trying to create a logistic regression with a Yes/No response for a continuous variable. I followed the "Fit Y by X" menu on JMP to get the attached graph, but I am confused on why data points are falling between "0" and "1". There were only two possible categories. I would also like to make this logistic regression account for repeated measures since there were many independent replicates for some individuals.

Re: Trying to create a binary logistic regression that accounts for repeated measures

ron_horne — Wed, 15 Sep 2021 16:58:13 GMT

Hi @rhammock ,

have a look at the 2nd example here.

please let us know if it helps

Re: Trying to create a binary logistic regression that accounts for repeated measures

dale_lehman — Wed, 15 Sep 2021 16:58:56 GMT

More to the point of your question, try this from a few years back: . I still find the graph confusing, but coloring the points does help.

Re: Trying to create a binary logistic regression that accounts for repeated measures

rhammock — Thu, 16 Sep 2021 20:56:55 GMT

I'm a little confused on concept of jitter. I understand that JMP uses it to avoid clumps of points at "0" and "1" for a logistic curve, but it is not random? Every time I re-run the "Fit Y by X" the spread is the same. Any help in understanding that would be appreciated, otherwise I get why JMP does logistic regressions like this.

Also, I'm having trouble finding the "coloring by Status" option

Thank you for the reply!

Re: Trying to create a binary logistic regression that accounts for repeated measures

rhammock — Thu, 16 Sep 2021 21:17:01 GMT

If I'm understanding correctly, I need to run my data through the generalized mixed model to account for the repeated measures and then do the logistic regression? My situation in more detail - I have a different number of independent replicates for different individuals. "avg_red_sta" is the same for an individual regardless of how many times its been used in an independent replicate, but "land?" can vary between replicates. I want to make sure that each individual has an equal weight in the distribution. I have a column in my data with a corresponding value to each "avg_red_sta" value.

Re: Trying to create a binary logistic regression that accounts for repeated measures

Mark_Bailey — Fri, 17 Sep 2021 14:37:34 GMT

The y ordinate is random, but the platform uses the same seed for the random generator. Users complained about the changing position of the markers when they ran the Logistic platform again.

Re: Trying to create a binary logistic regression that accounts for repeated measures

dale_lehman — Fri, 17 Sep 2021 18:24:37 GMT

Under the red arrow above Rows in the data table, color or mark by column - Status.