# condvis2

The goal of condvis2 is to visualise prediction models via shiny.
Predictions are generated from one or more model fits. Low-dimensional
visualisations are constructed showing the relationship between the
response and one or two (section) predictors, conditional on the
remaining predictors. The section predictors and conditioning values are
selected within the shiny app.

## Installation

You can install condvis2 from github with:

```
# install.packages("devtools")
devtools::install_github("cbhurley/condvis2")
```

## Example 1: A prediction model

This is a basic condvis example.

We will use the airquality data built in to R.

`ozone <- na.omit(airquality)`

```
fit <- loess(Ozone~Wind+Solar.R+Temp, data=ozone)
condvis(ozone, fit, sectionvars="Wind", conditionvars=c("Solar.R", "Temp"))
```

The result is shown in the screenshot below. It shows the loess
prediction for Wind, conditional on values of the other two
predictors.

Only observations whose Solar.R and Temp values are near (207,79) are
shown. The user can move around the pink cross to see how the prediction
varies.

Check out the
vignette `Introduction to condvis2`

for more information and
details.

## Example 2: A density estimate

```
library(ks)
data(iris)
irisf <- kde(x=iris[,1:3])
condvis(data = iris, model = list(kde=irisf),
sectionvars= c("Sepal.Length", "Sepal.Width"),
conditionvars= "Petal.Length", density=T)
```

The result is shown in the screenshot below. It shows the estimated
density of two variables conditional on the third.

## References

Catherine B. Hurley, Mark O’Connell, Katarina Domijan. (2021)
Interactive slice visualization for exploring machine learning models.
arXiv 2101.06986.

Mark O’Connell, Catherine Hurley, Katarina Domijan. (2017)
Conditional Visualization for Statistical Models: An Introduction to the
condvis Package in R. Journal of Statistical Software 81(5) 1–20.