https://community.jmp.com/t5/Discussions/Mod%C3%A8le-Lin%C3%A9aire-Sans-Constante/m-p/774268#M95587 <P>Most likely you can get answer from these</P> <UL> <LI><LI-MESSAGE title="When forcing intercept to zero, why JMP does not provide R-squared?" uid="329649" url="https://community.jmp.com/t5/Discussions/When-forcing-intercept-to-zero-why-JMP-does-not-provide-R/m-p/329649#U329649" discussion_style_icon_css="lia-mention-container-editor-message lia-img-icon-forum-thread lia-fa-icon lia-fa-forum lia-fa-thread lia-fa"></LI-MESSAGE>&nbsp; (same question different place <A href="https://stats.stackexchange.com/questions/495217/when-forcing-intercept-to-zero-how-r-squared-is-changed" target="_self">When forcing intercept to zero, how R-squared is changed? [duplicate] (stats.stackexchange.com)</A> and the non-duplicate answer <A href="https://stats.stackexchange.com/questions/267325/why-does-statsmodels-api-ols-over-report-the-r-squared-value/267329#267329" target="_blank" rel="noopener">Why does statsmodels.api.OLS over-report the r-squared value?</A> which has more links)</LI> <LI><LI-MESSAGE title="Why is RSquare nothing? - Summary of Fit of Model" uid="43831" url="https://community.jmp.com/t5/Discussions/Why-is-RSquare-nothing-Summary-of-Fit-of-Model/m-p/43831#U43831" discussion_style_icon_css="lia-mention-container-editor-message lia-img-icon-forum-thread lia-fa-icon lia-fa-forum lia-fa-thread lia-fa"></LI-MESSAGE>&nbsp;</LI> </UL> Sat, 20 Jul 2024 06:48:09 GMT jthi 2024-07-20T06:48:09Z https://community.jmp.com/t5/Discussions/Mod%C3%A8le-Lin%C3%A9aire-Sans-Constante/m-p/774054#M95565 <P>Bonjour à tous,</P><P>&nbsp;</P><P>J'essaye de modéliser une modèle linéaire avec la méthode des moindres carrés.</P><P>Dans mon modèle je peux choisir si je veux rajouter une constante ou non.</P><P>&nbsp;</P><P>Lorsque je rajoute une constante j'obtiens une valeur pour mon R carré, par contre quand je construis un modèle sans la constante mon R carré ne s'affiche pas.</P><P>&nbsp;</P><P><U>Exemple</U> avec la table "<STRONG>BigClass</STRONG>" :</P><P>&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="hcarr01_0-1721387063111.png" style="width: 400px;"><img src="https://community.jmp.com/t5/image/serverpage/image-id/66320i99129CCC1A009AE1/image-size/medium?v=v2&amp;px=400" role="button" title="hcarr01_0-1721387063111.png" alt="hcarr01_0-1721387063111.png" /></span></P><P>&nbsp;</P><P>Comment peut-on régler ce problème et obtenir le R carré si on veut un modèle sans constante ?</P><P>Merci pour votre réponse.</P><P>&nbsp;</P><P>&nbsp;</P> Fri, 19 Jul 2024 11:06:04 GMT https://community.jmp.com/t5/Discussions/Mod%C3%A8le-Lin%C3%A9aire-Sans-Constante/m-p/774054#M95565 hcarr01 2024-07-19T11:06:04Z https://community.jmp.com/t5/Discussions/Mod%C3%A8le-Lin%C3%A9aire-Sans-Constante/m-p/774268#M95587 <P>Most likely you can get answer from these</P> <UL> <LI><LI-MESSAGE title="When forcing intercept to zero, why JMP does not provide R-squared?" uid="329649" url="https://community.jmp.com/t5/Discussions/When-forcing-intercept-to-zero-why-JMP-does-not-provide-R/m-p/329649#U329649" discussion_style_icon_css="lia-mention-container-editor-message lia-img-icon-forum-thread lia-fa-icon lia-fa-forum lia-fa-thread lia-fa"></LI-MESSAGE>&nbsp; (same question different place <A href="https://stats.stackexchange.com/questions/495217/when-forcing-intercept-to-zero-how-r-squared-is-changed" target="_self">When forcing intercept to zero, how R-squared is changed? [duplicate] (stats.stackexchange.com)</A> and the non-duplicate answer <A href="https://stats.stackexchange.com/questions/267325/why-does-statsmodels-api-ols-over-report-the-r-squared-value/267329#267329" target="_blank" rel="noopener">Why does statsmodels.api.OLS over-report the r-squared value?</A> which has more links)</LI> <LI><LI-MESSAGE title="Why is RSquare nothing? - Summary of Fit of Model" uid="43831" url="https://community.jmp.com/t5/Discussions/Why-is-RSquare-nothing-Summary-of-Fit-of-Model/m-p/43831#U43831" discussion_style_icon_css="lia-mention-container-editor-message lia-img-icon-forum-thread lia-fa-icon lia-fa-forum lia-fa-thread lia-fa"></LI-MESSAGE>&nbsp;</LI> </UL> Sat, 20 Jul 2024 06:48:09 GMT https://community.jmp.com/t5/Discussions/Mod%C3%A8le-Lin%C3%A9aire-Sans-Constante/m-p/774268#M95587 jthi 2024-07-20T06:48:09Z