<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hello Cliff,<div><br></div><div> The only way I can imagine that you can do that without modifying the code is by using, for example, a Gompertz model with bathtub shape and setting the parameter arguments as follows:</div><div><br></div><div> thetaStart = c(-1, 0.1, 0, -10000, 1e-10)</div><div> thetaJump = c(0.01, 0.01, 0, 0, 0)</div><div><br></div><div> This will force the model to set the 'adult' part of the model to 0 as well as the 'c' parameter, and only use the declining Gompertz to fit it. I'm not sure that this will actually work, but you can always give it a try. Still, the latest version of BaSTA should be able to retrieve parameters for a Gompertz with negative senescence. </div><div><br></div><div> Best,</div><div><br></div><div> Fernando<br><div>
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><br class="Apple-interchange-newline">______________________________________________</div><div><div> </div><div>Fernando Colchero</div><div><br></div><div>Max Planck Institute for Demographic Research</div><div>Konrad Zuse Str. 1, 18057, Rostock, Germany</div><div>Tel: +49 (0) 381 2081 113</div><div>Fax: +49 (0) 381 2081 529</div><div><div>E-mail: <a href="mailto:Colchero@demogr.mpg.de">Colchero@demogr.mpg.de</a></div></div><div>______________________________________________</div></div><div><br></div><div><br></div></div></span><br class="Apple-interchange-newline"></span><br class="Apple-interchange-newline"></span>
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<br><div><div>On Nov 15, 2011, at 4:07 PM, Cliff Cunningham wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Dear Basta,<div><br></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>If I am applying Basta to a dataset, can I force it to fit a declining function, so that I can see the DIC and what it looks like? I assume it would be like the first part of the Siler function, which enforces a negative Gompertz, except this would apply to the whole dataset.</div><div><br></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>Thanks!</div><div><br><div><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><div style="font-size: 12px; "><br></div><div style="font-size: 12px; "> <span class="Apple-converted-space"> </span><span class="Apple-tab-span" style="white-space: pre; "> </span>Cliff Cunningham</div><div style="font-size: 12px; "><br></div><div style="font-size: 12px; "><br class="Apple-interchange-newline"> Professor</div><div style="font-size: 12px; "><span class="Apple-tab-span" style="white-space: pre; "> </span>Biology Department</div><div style="font-size: 12px; "> <span class="Apple-tab-span" style="white-space: pre; "> </span>Duke University</div><div style="font-size: 12px; "> 130 Science Drive</div><div style="font-size: 12px; "><span class="Apple-tab-span" style="white-space: pre; "> </span>Durham NC 27708<br class="webkit-block-placeholder"></div><div style="font-size: 12px; "><span class="Apple-tab-span" style="white-space: pre; "> </span>Phone 919-660-7356<br></div><div style="font-size: 12px; "><br></div><div style="font-size: 12px; "><a href="http://www.biology.duke.edu/cunningham">http://www.biology.duke.edu/cunningham</a></div><div style="font-size: 12px; "><br class="khtml-block-placeholder"></div></span><br class="Apple-interchange-newline"></span><br class="Apple-interchange-newline">
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