how to plot individual covariates entered directly into DM

questions concerning analysis/theory using program MARK

how to plot individual covariates entered directly into DM

Postby birdnests » Mon Nov 13, 2023 12:47 pm

Hi There, I'm using Nest Survival Analysis in MARK and want to start plotting my top model with the Individual Covariate Plot function. I'm looking at 11.5 Plotting + individual covariates in the book. However, covariate values that I entered directly into the Design Matrix (DM) don’t show up as an option to select for the plotting function, only the covariates that were given a label from the beginning are. Covariate values I entered directly into the DM include a binary variable and Date (numbered as observed days 1 through 54). The text for the plotting individual covariates section shows an example of a product column that was added to the Design Matrix being plotted but I have no option to select for that either in my model. Is there a step to incorporate these values that were entered directly into the Design Matrix to be able to select from in the Individual Covariate Plot function? Thank you for any advice!
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Re: how to plot individual covariates entered directly into

Postby cooch » Mon Nov 13, 2023 5:18 pm

Unless you enter the covariates and the names you assign them in the model specification window (see section 11.2.1), then you can't enter them in the DM after the fact. MARK is only 'aware' of named covariates if you 'tell MARK' how many, and what they're named, when you specify the model. But, you can use the DM functions to make derived variables that are functions of named variables. As per the example in Chapter 11, mass and power(mass,2), as opposed to having two separate named variables (say, mass and mass2) in the .inp file.
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Re: how to plot individual covariates entered directly into

Postby birdnests » Mon Nov 13, 2023 5:34 pm

Perfect, will do! Thank you for your advice!
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