* using log directory 'd:/Rcompile/CRANpkg/local/4.1/modelbased.Rcheck'
* using R version 4.1.3 (2022-03-10)
* using platform: x86_64-w64-mingw32 (64-bit)
* using session charset: ISO8859-1
* checking for file 'modelbased/DESCRIPTION' ... OK
* checking extension type ... Package
* this is package 'modelbased' version '0.8.1'
* package encoding: UTF-8
* checking package namespace information ... OK
* checking package dependencies ... OK
* checking if this is a source package ... OK
* checking if there is a namespace ... OK
* checking for hidden files and directories ... OK
* checking for portable file names ... OK
* checking whether package 'modelbased' can be installed ... OK
* checking installed package size ... OK
* checking package directory ... OK
* checking 'build' directory ... OK
* checking DESCRIPTION meta-information ... OK
* checking top-level files ... OK
* checking for left-over files ... OK
* checking index information ... OK
* checking package subdirectories ... OK
* checking R files for non-ASCII characters ... OK
* checking R files for syntax errors ... OK
* checking whether the package can be loaded ... OK
* checking whether the package can be loaded with stated dependencies ... OK
* checking whether the package can be unloaded cleanly ... OK
* checking whether the namespace can be loaded with stated dependencies ... OK
* checking whether the namespace can be unloaded cleanly ... OK
* checking loading without being on the library search path ... OK
* checking use of S3 registration ... OK
* checking dependencies in R code ... OK
* checking S3 generic/method consistency ... OK
* checking replacement functions ... OK
* checking foreign function calls ... OK
* checking R code for possible problems ... [9s] OK
* checking Rd files ... [1s] OK
* checking Rd metadata ... OK
* checking Rd cross-references ... OK
* checking for missing documentation entries ... OK
* checking for code/documentation mismatches ... OK
* checking Rd \usage sections ... OK
* checking Rd contents ... OK
* checking for unstated dependencies in examples ... OK
* checking installed files from 'inst/doc' ... OK
* checking files in 'vignettes' ... OK
* checking examples ... [11s] ERROR
Running examples in 'modelbased-Ex.R' failed
The error most likely occurred in:

> ### Name: estimate_slopes
> ### Title: Estimate Marginal Effects
> ### Aliases: estimate_slopes
> 
> ### ** Examples
> 
> if (require("emmeans")) {
+   # Get an idea of the data
+   if (require("ggplot2")) {
+     ggplot(iris, aes(x = Petal.Length, y = Sepal.Width)) +
+       geom_point(aes(color = Species)) +
+       geom_smooth(color = "black", se = FALSE) +
+       geom_smooth(aes(color = Species), linetype = "dotted", se = FALSE) +
+       geom_smooth(aes(color = Species), method = "lm", se = FALSE)
+   }
+ 
+   # Model it
+   model <- lm(Sepal.Width ~ Species * Petal.Length, data = iris)
+   # Compute the marginal effect of Petal.Length at each level of Species
+   slopes <- estimate_slopes(model, trend = "Petal.Length", at = "Species")
+   slopes
+   if (require("see")) {
+     plot(slopes)
+   }
+   standardize(slopes)
+ 
+   if (require("mgcv") && require("see")) {
+     model <- mgcv::gam(Sepal.Width ~ s(Petal.Length), data = iris)
+     slopes <- estimate_slopes(model, at = "Petal.Length", length = 50)
+     summary(slopes)
+     plot(slopes)
+ 
+     model <- mgcv::gam(Sepal.Width ~ s(Petal.Length, by = Species), data = iris)
+     slopes <- estimate_slopes(model,
+       trend = "Petal.Length",
+       at = c("Petal.Length", "Species"), length = 20
+     )
+     summary(slopes)
+     plot(slopes)
+   }
+ }
Loading required package: emmeans
Loading required package: ggplot2
Loading required package: see
Loading required package: mgcv
Loading required package: nlme
This is mgcv 1.8-40. For overview type 'help("mgcv-package")'.
No numeric variable was specified for slope estimation. Selecting `trend = "Petal.Length"`.
Error in emmeans::emtrends(model, specs = args$emmeans_specs, var = args$trend,  : 
  Variable 'Petal.Length' is not in the dataset
Calls: estimate_slopes -> get_emtrends -> <Anonymous>
Execution halted
* checking for unstated dependencies in 'tests' ... OK
* checking tests ... [47s] OK
  Running 'spelling.R' [0s]
  Running 'testthat.R' [46s]
* checking for unstated dependencies in vignettes ... OK
* checking package vignettes in 'inst/doc' ... OK
* checking re-building of vignette outputs ... [2s] OK
* checking PDF version of manual ... OK
* DONE
Status: 1 ERROR