Bill Behrman

The level set with value $r$ of a quadratic form defined by a real, symmetric, positive-definite matrix with eigenvalues $\lambda_i$ is an ellipsoid with semi-axes of length $(r / \lambda_i)^{1/2}$....

Thanks for the explanation, Lionel. I had never encountered this before. I'm writing materials for a book chapter on simulation, where functions often don't take arguments, and I'll be sure...

PS Was it a conscious decision to have `map_*()` behave differently for the two cases I provided when the function has no arguments? There are use cases, such as simulation,...

Michael, thank you for your reply. The purpose for my issue was to raise the question of whether it might be better to internally treat `map(x, fun)` as `map(x, ~...

Going back to the simulation example, the function called without arguments could return a complex object, such as a tibble. If `map_*(x, fun)` acted internally as `map_*(x, ~ fun())`, users...

I was not advocating ignoring the first argument. I was proposing that internally `map(x, fun)` use `rlang::as_function()`, as `map(x, ~ fun())` does, as @lionel pointed out above. If this were...

I'm very happy to hear that you will incorporate front-door adjustment sets into the dagitty R package. I'm creating documentation with worked examples to help students learn how to use...

@ankurankan If you can remember, please comment to this thread when `DAG.to_pdag()`has been implemented. I will update the [pgmpy tutorial](https://github.com/behrman/cis/blob/master/solutions_pgmpy.ipynb) I've written to include an illustration of its use.

@ankurankan I just noticed that I failed to link to the code for the JavaScipt function `GraphAnalyzer.listMinimalSeparators()`. It's: ([code](https://github.com/jtextor/dagitty/blob/master/jslib/graph/GraphAnalyzer.js), lines 1143 - 1182). The code looks straightforward, but as someone...

@jtextor I believe that @benibela submitted [pull request #73](https://github.com/jtextor/dagitty/pull/73) to implement front-door adjustment sets, and you merged it on May 26, 2023. Do you plan to make this functionality available...