About gbrussell

gbrussell · ‎12-07-2020

Thank you for the post. I could not find an example or documentation on selecting a better value. I appreciate your time.

gbrussell · ‎12-02-2020

Steve -- This was my original approach, but I could never decide what were good starting values. Could you share insight into how you narrowed that down? I tried a grid approach and never really found anything that made much sense. Thank you again! Greg

gbrussell · ‎12-02-2020

Thank you -- your and Steve's help have been very much appreciated.

gbrussell · ‎12-02-2020

That's a great question and I apologize for lack of clarity / thoroughness. The question is how many procedures are needed to become proficient. The surgeon was trying to assess how many he needed to do before his times hit a plateau.

gbrussell · ‎12-01-2020

Here are the data -- apologize for the simple posting style. data surgery; input surgeryno duration; cards; 1 182 2 150 3 223 4 142 5 111 6 164 7 83 8 144 9 162 10 83 11 70 12 114 13 113 14 97 15 83 16 111 17 73 18 87 19 86 20 102 21 124 22 95 23 134 24 121 25 60 ; proc sgplot data=surgery; scatter x=surgeryno y=duration; run;

gbrussell · ‎12-01-2020

Hi -- I asked this yesterday, but I want to frame it differently today. I'd like to find the plateau point without date -- just surgery number. The sas file is attached, and the data are simple. 25 surgeries, numbered 1 to 25. I used a pbspline, but it certainly looks like no plateau. If so, that's fine, but I need someone who knows this better than me to say so. I appreciate any help you can lend.

gbrussell · ‎12-01-2020

Thank you very much for your time. This is quite helpful and thorough.

gbrussell · ‎11-30-2020

Thank you for the plot/model -- it works very well and will help provide what I need to report. I appreciate your time.

gbrussell · ‎11-30-2020

The model doesn't work for these data, at least not using the alpha, beta, gamma, X0 in the link. That's where I need a bit of help. Thanks!

gbrussell · ‎11-30-2020

I have data on surgery number (1-25) and surgery minutes by the same physician; he wants to know when his data plateaus. I've seen the example (https://documentation.sas.com/?cdcId=pgmsascdc&cdcVersion=9.4_3.4&docsetId=statug&docsetTarget=statug_nlin_examples01.htm&locale=en) but am not sure of the parameters I need to specify for this. Any help would be welcomed. I'd like to plot the data; here's what the data look like (surgery #, date, length of procedure): 1 3/20/2019 182 2 5/16/2019 150 3 5/30/2019 223 4 6/6/2019 142 5 6/11/2019 111 6 7/11/2019 164 7 7/26/2019 83 8 8/22/2019 144 9 8/29/2019 162 10 9/19/2019 83 11 10/10/2019 70 12 10/17/2019 114 13 10/31/2019 113 14 11/7/2019 97 15 11/21/2019 83 16 12/5/2019 111 17 12/5/2019 73 18 12/12/2019 87 19 12/19/2019 86 20 1/9/2020 102 21 1/16/2020 124 22 1/23/2020 95 23 1/30/2020 134 24 3/5/2020 121 25 6/4/2020 60

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Date Last Visited	‎12-07-2020 11:53 AM

Re: Model to determine plateau point in dataset -- surgery length is m...

Re: Model to determine plateau point -- surgery length again, but igno...

Re: Model to determine plateau point -- surgery length again, but igno...

Re: Model to determine plateau point -- surgery length again, but igno...

Re: Model to determine plateau point -- surgery length again, but igno...

Model to determine plateau point -- surgery length again, but ignore d...

Re: Model to determine plateau point in dataset -- surgery length is m...

Re: Model to determine plateau point in dataset -- surgery length is m...

Re: Model to determine plateau point in dataset -- surgery length is m...

Model to determine plateau point in dataset -- surgery length is my ou...

Re: Model to determine plateau point in dataset -- surgery length is m...

Re: Model to determine plateau point -- surgery length again, but igno...

Re: Model to determine plateau point -- surgery length again, but igno...

Re: Model to determine plateau point -- surgery length again, but igno...

Re: Model to determine plateau point -- surgery length again, but igno...

Model to determine plateau point -- surgery length again, but ignore d...

Re: Model to determine plateau point in dataset -- surgery length is m...

Re: Model to determine plateau point in dataset -- surgery length is m...

Re: Model to determine plateau point in dataset -- surgery length is m...

Model to determine plateau point in dataset -- surgery length is my ou...