2 replies to this topic

[RB2017]

Hello,

 

I would like to introduce weight as a covariate in alometric scale. I mean, I would like to codify

 

TVCL= THETA(1) * (WT/70) **0.75

 

I tried to write it as a code in the "Model text", but I can find how to codify it:

 

Can anyone help me?

 

Thank you very much

 

MR

[smouksassi1]

the graphical user interface will let you define a model like this first define WT as a covariate then map it if the name in your data is not WT otherwise it will be automatically mapped. By default the covariate is continuous and you can just type in any value for centering e.g. 70 

 

the code will look like

 

...
fcovariate(WT)

 

stparm(Cl = tvCl * (WT/70)^dCldWT * exp(nCl))

 

and then you can "freeze" the dCldWT to 0.75

 

or then  go to textual mode and edit it to and remove  dCldWT parameter

stparm(Cl = tvCl * (WT/70)^0.75* exp(nCl))

[RB2017]

Thank you very much for your help!

 

Best regards,

 

MR

the graphical user interface will let you define a model like this first define WT as a covariate then map it if the name in your data is not WT otherwise it will be automatically mapped. By default the covariate is continuous and you can just type in any value for centering e.g. 70 

 

the code will look like

 

...
fcovariate(WT)

 

stparm(Cl = tvCl * (WT/70)^dCldWT * exp(nCl))

 

and then you can "freeze" the dCldWT to 0.75

 

or then  go to textual mode and edit it to and remove  dCldWT parameter

stparm(Cl = tvCl * (WT/70)^0.75* exp(nCl))