Get started with tidymodels using vaccination rate data 

I don't think I've done a screencast, but here is an example with a keras neural network: www.tidymodels.org/learn/models/parsnip-nnet/ And my recent book with Emil Hvitfeldt has a section on using keras with tidymodels packages: smltar.com/dloverview.html

It's been a while since I made this video, but I believe because I was preparing to train a model to predict whether a school was above/below the threshold, using that same factor variable.

I was in primary school (UK version of grade school) and I remember getting an injection lol ... Injections have traumatised me since that day. 😂🥲

The outcome is the factor `mmr_threshold`, which has levels "Above" and "Below". Because R defaults to alphabetical order for factors, the model is predicting the probability of being below compared to being above. When I use the `predict()` function later, notice that I pick out the probabilities of being above.

@@JuliaSilge Thank you for your time of explanation! Wow I did not know such details as R defaults to aphabetical order for factor in function. I understand now. Thank you again & have a nice day!

You might try a Chromium browser (Chrome, Brave) if you are having trouble with resolution. RU-vid videos tend to render better in those. Also, under the settings gear, make sure you have chosen HD 1080p quality.

Julia, I use Chrome and I am view these videos in youtube for clarity so that is not the problem. I also know that these settings are clearly not an issue when I watch other videos like Mike Marin (R and Stats) and Greg Martin (Global Health - he does some nifty R videos also). Same goes for the LaTeX lectures that Michelle Krummel has up and Derek Banas (he uses a dark background like you and his font is also a little bit fuzzy but size makes up for it). I am telling you this not because I am an isolated case - more I am likely not. I, for one, click on interesting R video topics and if I can't read the screen then I am gone. By making your text and or screen bigger I am sure you get more hits and the followers you deserve. Just a suggestion.

@@haraldurkarlsson1147 No worries -- I definitely appreciate feedback, especially about accessibility issues! In some of my early videos like this one, I know I did not have the size bumped up enough but have since changed how I record. 👍

Thanks for doing these videos - the content is first class. Keep up the good work.

I have a quick question that I hope you don't mind answering. I have been working with the rebus package (with stringr) in RStudio and wondered if there was a shortcut for %R% sequence similar to %>& (for a Mac). I have not seen one. I thought you might know as an RStudio employee.

rstanarm can be a bit difficult to install. Try again and say "no", which means you will install a binary instead of the source, which needs to be compiled.

@@JuliaSilge Thanks, Julia. I did what you said(installed the binary pack), but when I conduct "library(rstanarm)", this message appeared. Error: package or namespace load failed for ‘rstanarm’ in dyn.load(file, DLLpath = DLLpath, ...): unable to load shared object '/Library/Frameworks/R.framework/Versions/4.0/Resources/library/rstan/libs/rstan.so': dlopen(/Library/Frameworks/R.framework/Versions/4.0/Resources/library/rstan/libs/rstan.so, 6): Symbol not found: _EXTPTR_PTR Referenced from: /Library/Frameworks/R.framework/Versions/4.0/Resources/library/rstan/libs/rstan.so Expected in: /Library/Frameworks/R.framework/Resources/lib/libR.dylib in /Library/Frameworks/R.framework/Versions/4.0/Resources/library/rstan/libs/rstan.so In addition: Warning message: package ‘rstanarm’ was built under R version 4.0.2

@@sophiej4605 OK, trying installing a binary of rstan, i.e. `install.packages("rstan")` and then installing the binary for rstanarm.

@@JuliaSilge I installed a binary of rstan, but when I load this, this error message comes out. Error: package or namespace load failed for ‘rstan’ in dyn.load(file, DLLpath = DLLpath, ...): unable to load shared object '/Library/Frameworks/R.framework/Versions/4.0/Resources/library/rstan/libs/rstan.so': dlopen(/Library/Frameworks/R.framework/Versions/4.0/Resources/library/rstan/libs/rstan.so, 6): Symbol not found: _EXTPTR_PTR Referenced from: /Library/Frameworks/R.framework/Versions/4.0/Resources/library/rstan/libs/rstan.so Expected in: /Library/Frameworks/R.framework/Resources/lib/libR.dylib in /Library/Frameworks/R.framework/Versions/4.0/Resources/library/rstan/libs/rstan.so

@@sophiej4605 Hmmmmm, sounds like you may need a bit more detailed help than just going back and forth in comments here. I suggest you look in detail at the instructions about installing rstan here: github.com/stan-dev/rstan/wiki/RStan-Getting-Started And then look at the Stan forums to folks with similar problems to see how they solved it: discourse.mc-stan.org/

You can install it from GitHub using devtools::install_github("juliasilge/silgelib"): github.com/juliasilge/silgelib However, you can use something like theme_minimal that comes with ggplot2 for a pretty similar look, but with default fonts. You will need to install the fonts on your computer as well. If you want some theming that is more out-of-the-box, check out the hrbrthemes package: cinc.rud.is/web/packages/hrbrthemes/

@@JuliaSilge Thank you very much! you are very kind, thank you very much for sharing your knowledge!

I almost always do, but this one didn't make it into blog form. You can find my tidymodels blog posts here: juliasilge.com/category/tidymodels/