Zachary Susswein zsusswein
zsusswein
/ convolve.stan
Last active
October 2, 2023 08:41
Convolve two sequences in Stan with the FFT. Matches `convolve(x, rev(y), type = "open")` in R.
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| functions { | |
| vector convolve(vector a, vector b) { | |
| int na = num_elements(a); // Vector lengths | |
| int nb = num_elements(b); | |
| int n_zero_a = nb - 1; // Zero padding lengths | |
| int n_zero_b = na - 1; | |
| vector[nb] b_rev = reverse(b); // The reversed b vector | |
| vector[na + n_zero_a] a_pad; // Instantiate zero padded vectors |
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| # Set default user agent header | |
| options(HTTPUserAgent = sprintf( | |
| "R/%s R (%s)", | |
| getRversion(), | |
| paste( | |
| getRversion(), | |
| R.version["platform"], | |
| R.version["arch"], | |
| R.version["os"] | |
| ) |
zsusswein
/ fast-arrow-install.R
Last active
September 18, 2023 15:41
Installing precompiled arrow into a one-off script
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| # This works for many common packages, not just arrow! | |
| # fast install from https://arrow.apache.org/docs/r/articles/install.html#method-1a---binary-r-package-containing-libarrow-binary-via-rspmconda | |
| options( | |
| HTTPUserAgent = | |
| sprintf( | |
| "R/%s R (%s)", | |
| getRversion(), | |
| paste(getRversion(), R.version["platform"], R.version["arch"], R.version["os"]) | |
| ) | |
| ) |