The goal of shinymodels is to launch a Shiny app given tidymodels’ tuning or resampling results, to make it easier to explore the modeling results.
You can install the released version of shinymodels from CRAN with:
And the development version from GitHub with:
# install.packages("devtools") devtools::install_github("tidymodels/shinymodels")
Start by tuning or fitting to resampling folds, using tune functions like
As an example, we will simulate a simple relationship:
library(shinymodels) library(tidymodels) tidymodels_prefer() set.seed(1) n <- 100 simulated <- data.frame(x1 = runif(n, min = -1), x2 = runif(n)) %>% mutate(y = 3 - 5 * x1 + 15 * x1^2 + + 10 * x2 + rnorm(n, sd = 5))
Let’s resample a linear regression model that is missing an important nonlinear term (i.e.,
set.seed(2) folds <- vfold_cv(simulated) reg_res <- linear_reg() %>% fit_resamples(y ~ ., resamples = folds, control = control_resamples(save_pred = TRUE))
To interactively assess the model fit, we can use the
Use the Shiny app to explore the model results and detect any outliers or problematic observations. In the image below, the observed and predicted values are visualized, with one sample selected and highlighted. The residuals are also plotted against
x1 and the quadratic pattern shows that a nonlinear term should be added.
explore() function can be used with objects produced by
last_fit(), or any of the
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Check out further details on contributing guidelines for tidymodels packages and how to get help.