# You write R packages and functions? This package will change your life!

**R on easystats**, and kindly contributed to R-bloggers]. (You can report issue about the content on this page here)

Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.

## What is it?

We are talking about the **insight package**. It is what allows other packages, like **easystats** (parameters, effectsize, performance, report, …) or **ggstatsplot**, **sjstats** or **modelsummary** to be as powerful as they are, supporting tons of different R models. So why make you life hard when you can be like them, and rely on **insight**?

It is made for developers (and users) that do some **postprocessing** of different models (e.g., extracting stuff like parameters, values, data, names, specifications, predictions, priors, etc.), whether it is to nicely display their results or to do further computation.

If you work with, and around, different R models, then **this package is a must-have that will change your life**.

## What’s the problem

Because R has so many different packages, different models were implemented by different people in a different way. As a consequence, there are different ways of accessing the same stuff from each model.

For example, let’s say you want to find the **names of the predictors** (the independent variables) of a linear model. One way would be like this:

model_lm <- lm(mpg ~ drat * wt, data=mtcars) names(model_lm$model)[-1] ## [1] "drat" "wt"

But what in the case of a lme4’s mixed model? Well the solution is a bit different, plus it’s not easy to drop the random factors…

model_lmer <- lme4::lmer(mpg ~ drat * wt + (1|cyl), data=mtcars) names(model_lmer@frame)[-1] ## [1] "drat" "wt" "cyl"

And what in the case of a GAMM4’s general additive model?

model_gam <- gamm4::gamm4(mpg ~ drat + wt + s(qsec), data=mtcars) head(names(model_gam$gam$model)[-1], -3) ## [1] "drat" "wt" "qsec"

Again different! Maybe you could do something like that, but then you have to account for **all the edgecases** and so on. And trust us, **that’s a lot of work** to have a robust and bug-free solution.

## How ‘insight’ addresses it

**insight** allows you to extract stuff from all models in a consistent and robust way. For instance, for the fixed predictors of the examples above, here’s how you would do it with insight:

library(insight) find_predictors(model_lm) ## $conditional ## [1] "drat" "wt" find_predictors(model_lmer) ## $conditional ## [1] "drat" "wt" find_predictors(model_gam) ## $conditional ## [1] "drat" "wt" "qsec"

**Boom!** One function that works for all the models. And that’s not all, **insight** can help you extract data, parameters, intercepts, degrees of freedom, sigma, variance, predicted values, variable names, interaction terms, random factors, smooth terms, etc. etc. Basically, everything you might need. And if what you need is not there, just **ask for it**.

You can check all that **insight** can do **here**.

## More reasons to use it

If you’re worried about adding a new dependency to your package, don’t be! Because **insight** is super light: it itself has **no dependencies**. So it’s a safe choice to add and rely on!

It includes other useful **features that you don’t know you absolutely need**, like value formatting, nice printing of text, table and data.frames exporting and much more! Check out them **here**.

## Get Involved

*easystats* is a project in active development, looking for contributors and supporters. Thus, do not hesitate to contact us if **you want to get involved 🙂**

**Check out our other blog posts**!*here*

## Stay tuned

To be updated about the *upcoming features* and cool R or data science stuff, you can **follow the packages on GitHub** (click on one of the easystats package) and then on the **Watch** button on the top right corner) as well as the **easystats team on twitter and online**:

**leave a comment**for the author, please follow the link and comment on their blog:

**R on easystats**.

R-bloggers.com offers

**daily e-mail updates**about R news and tutorials about learning R and many other topics. Click here if you're looking to post or find an R/data-science job.

Want to share your content on R-bloggers? click here if you have a blog, or here if you don't.