Tools for scraping information from webpages and other XML contents, using XPath or CSS selectors.

The 'scrapeR' package utilizes functions that fetch and extract text content from specified web pages. It handles HTTP errors and parses HTML efficiently. The package can handle hundreds of websites at a time using the scrapeR_in_batches() command.

A group of functions to scrape data from different websites, for 
    academic purposes.

Routines for a collection of screen-and-clean type
        variable selection procedures, including UPS and GS.

Optimal hard thresholding of singular values. The procedure adaptively estimates the best singular value threshold under unknown noise characteristics. The threshold chosen by 'ScreeNOT' is optimal (asymptotically, in the sense of minimum Frobenius error) under the the so-called "Spiked model" of a low-rank matrix observed in additive noise. In contrast to previous works, the noise is not assumed to be i.i.d. or white; it can have an essentially arbitrary and unknown correlation structure, across either rows, columns or both. 'ScreeNOT' is proposed to practitioners as a mathematically solid alternative to Cattell's ever-popular but vague Scree Plot heuristic from 1966. 
    If you use this package, please cite our paper: David L. Donoho, Matan Gavish and Elad Romanov (2023). "ScreeNOT: Exact MSE-optimal singular value thresholding in correlated noise." Annals of Statistics, 2023 (To appear). <arXiv:2009.12297>.

Take screenshots from R command and locate an image position.

Minimal R client for the 'Screenshotbase' API to render website screenshots
    and query account status. Provides functions to set the API key, call the
    status endpoint, and take a screenshot as a raw image response.

Implementation of the scregclust algorithm
  described in Larsson, Held, et al. (2024) <doi:10.1038/s41467-024-53954-3>
  which reconstructs regulatory programs of target genes in scRNA-seq data.
  Target genes are clustered into modules and each module is associated with a linear
  model describing the regulatory program.