https://community.jmp.com/t5/Discussions/Why-can-t-use-Fit-Logistic-4P-Rodbard/m-p/714764#M89808 <P>hi, why does the option 'Fit Logistic 4P Rodbard' gray out in my JMP(16.1.0)? Anyone know the reason？Thanks！</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="ChernoffTurtle7_0-1704939797607.png" style="width: 400px;"><img src="https://community.jmp.com/t5/image/serverpage/image-id/60258i9427F677FF9B358B/image-size/medium?v=v2&amp;px=400" role="button" title="ChernoffTurtle7_0-1704939797607.png" alt="ChernoffTurtle7_0-1704939797607.png" /></span></P><P>&nbsp;</P> Thu, 11 Jan 2024 02:24:43 GMT ChernoffTurtle7 2024-01-11T02:24:43Z https://community.jmp.com/t5/Discussions/Why-can-t-use-Fit-Logistic-4P-Rodbard/m-p/714764#M89808 <P>hi, why does the option 'Fit Logistic 4P Rodbard' gray out in my JMP(16.1.0)? Anyone know the reason？Thanks！</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="ChernoffTurtle7_0-1704939797607.png" style="width: 400px;"><img src="https://community.jmp.com/t5/image/serverpage/image-id/60258i9427F677FF9B358B/image-size/medium?v=v2&amp;px=400" role="button" title="ChernoffTurtle7_0-1704939797607.png" alt="ChernoffTurtle7_0-1704939797607.png" /></span></P><P>&nbsp;</P> Thu, 11 Jan 2024 02:24:43 GMT https://community.jmp.com/t5/Discussions/Why-can-t-use-Fit-Logistic-4P-Rodbard/m-p/714764#M89808 ChernoffTurtle7 2024-01-11T02:24:43Z https://community.jmp.com/t5/Discussions/Why-can-t-use-Fit-Logistic-4P-Rodbard/m-p/715268#M89823 <P>That model is disallowed when you have a dose equal to zero. Here is the result if that level is excluded and hidden:</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="dose.JPG" style="width: 597px;"><img src="https://community.jmp.com/t5/image/serverpage/image-id/60264iD2E575FED5A4EEDB/image-size/large?v=v2&amp;px=999" role="button" title="dose.JPG" alt="dose.JPG" /></span></P> <P>Some analysts use log dose, which is missing for dose equal to zero. This model is available in this case, too:</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="log dose.JPG" style="width: 597px;"><img src="https://community.jmp.com/t5/image/serverpage/image-id/60265i851FC5012CB0EF3B/image-size/large?v=v2&amp;px=999" role="button" title="log dose.JPG" alt="log dose.JPG" /></span></P> Thu, 11 Jan 2024 16:07:20 GMT https://community.jmp.com/t5/Discussions/Why-can-t-use-Fit-Logistic-4P-Rodbard/m-p/715268#M89823 Mark_Bailey 2024-01-11T16:07:20Z https://community.jmp.com/t5/Discussions/Why-can-t-use-Fit-Logistic-4P-Rodbard/m-p/716161#M89838 <P>thank you very much!</P> Fri, 12 Jan 2024 02:16:07 GMT https://community.jmp.com/t5/Discussions/Why-can-t-use-Fit-Logistic-4P-Rodbard/m-p/716161#M89838 ChernoffTurtle7 2024-01-12T02:16:07Z