https://community.jmp.com/t5/Discussions/Urgent-covariance-parameter-estimates-are-all-zero-i-e-estimate/m-p/507532#M73693 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="MomentMonster90_0-1655124116018.png" style="width: 400px;"><img src="https://community.jmp.com/t5/image/serverpage/image-id/43198i59DBE834DD3B307A/image-size/medium?v=v2&amp;px=400" role="button" title="MomentMonster90_0-1655124116018.png" alt="MomentMonster90_0-1655124116018.png" /></span></P><P>Dear All,</P><P>I have been analysing a two factorial (3*4) RCBD repeated measures design by using the mixed model approach in JMP. Above is a section of the report I got. Why are the estimates zero. Other information include about the analysis include:</P><P>1. 14 continuous variables measured four times at unequal time periods</P><P>2. All the three covariance structures I tried (AR1, Toeplizt and spatial power) had similar fixed effects but of different magnitudes</P><P>3. However for three variables the repeated effects covariance parameter estimates were zero; two of these variables were angular (i.e. in degrees) and the other ratio ( in the range of zeros (0.2 to 0.9)</P><P>Please I want to know why the estimates are zero.</P><P>NB: there was no random effect as recommended by the JMP instructions I had.</P><P>Thank you in advance</P><P>&nbsp;</P> Mon, 13 Jun 2022 12:53:22 GMT MomentMonster90 2022-06-13T12:53:22Z https://community.jmp.com/t5/Discussions/Urgent-covariance-parameter-estimates-are-all-zero-i-e-estimate/m-p/507532#M73693 <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="MomentMonster90_0-1655124116018.png" style="width: 400px;"><img src="https://community.jmp.com/t5/image/serverpage/image-id/43198i59DBE834DD3B307A/image-size/medium?v=v2&amp;px=400" role="button" title="MomentMonster90_0-1655124116018.png" alt="MomentMonster90_0-1655124116018.png" /></span></P><P>Dear All,</P><P>I have been analysing a two factorial (3*4) RCBD repeated measures design by using the mixed model approach in JMP. Above is a section of the report I got. Why are the estimates zero. Other information include about the analysis include:</P><P>1. 14 continuous variables measured four times at unequal time periods</P><P>2. All the three covariance structures I tried (AR1, Toeplizt and spatial power) had similar fixed effects but of different magnitudes</P><P>3. However for three variables the repeated effects covariance parameter estimates were zero; two of these variables were angular (i.e. in degrees) and the other ratio ( in the range of zeros (0.2 to 0.9)</P><P>Please I want to know why the estimates are zero.</P><P>NB: there was no random effect as recommended by the JMP instructions I had.</P><P>Thank you in advance</P><P>&nbsp;</P> Mon, 13 Jun 2022 12:53:22 GMT https://community.jmp.com/t5/Discussions/Urgent-covariance-parameter-estimates-are-all-zero-i-e-estimate/m-p/507532#M73693 MomentMonster90 2022-06-13T12:53:22Z