Description
Functions and data sets inspired by data sharpening - data perturbation to achieve improved performance in nonparametric estimation, as described in Choi, E., Hall, P. and Rousson, V. (2000). Capabilities for enhanced local linear regression function and derivative estimation are included, as well as an asymptotically correct iterated data sharpening estimator for any degree of local polynomial regression estimation. A cross-validation-based bandwidth selector is included which, in concert with the iterated sharpener, will often provide superior performance, according to a median integrated squared error criterion. Sample data sets are provided to illustrate function usage.
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CRAN Check Status
Show all 14 flavors
| Flavor | Status |
|---|---|
| r-devel-linux-x86_64-debian-clang | NOTE |
| r-devel-linux-x86_64-debian-gcc | NOTE |
| r-devel-linux-x86_64-fedora-clang | OK |
| r-devel-linux-x86_64-fedora-gcc | OK |
| r-devel-macos-arm64 | OK |
| r-devel-windows-x86_64 | OK |
| r-oldrel-macos-arm64 | OK |
| r-oldrel-macos-x86_64 | OK |
| r-oldrel-windows-x86_64 | OK |
| r-patched-linux-x86_64 | OK |
| r-release-linux-x86_64 | OK |
| r-release-macos-arm64 | OK |
| r-release-macos-x86_64 | OK |
| r-release-windows-x86_64 | OK |
Check details (2 non-OK)
CRAN incoming feasibility
Maintainer: ‘W.J. Braun <john.braun@ubc.ca>’
No Authors@R field in DESCRIPTION.
Please add one, modifying
Authors@R: c(person(given = c("W.", "John"),
family = "Braun",
role = "aut",
email = "john.braun@ubc.ca"),
person(given = "W.J.",
family = "Braun",
role = "cre",
email = "john.braun@ubc.ca"))
as necessary.
CRAN incoming feasibility
Maintainer: ‘W.J. Braun <john.braun@ubc.ca>’
No Authors@R field in DESCRIPTION.
Please add one, modifying
Authors@R: c(person(given = c("W.", "John"),
family = "Braun",
role = "aut",
email = "john.braun@ubc.ca"),
person(given = "W.J.",
family = "Braun",
role = "cre",
email = "john.braun@ubc.ca"))
as necessary.
Check History
NOTE 12 OK · 2 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Mar 10, 2026
CRAN incoming feasibility
Maintainer: ‘W.J. Braun <john.braun@ubc.ca>’
No Authors@R field in DESCRIPTION.
Please add one, modifying
Authors@R: c(person(given = c("W.", "John"),
family = "Braun",
role = "aut",
email = "john.braun@ubc.ca"),
person(given = "W.J.",
family = "Braun",
role = "cre",
email = "john.braun@ubc.ca"))
as necessary.
CRAN incoming feasibility
Maintainer: ‘W.J. Braun <john.braun@ubc.ca>’
No Authors@R field in DESCRIPTION.
Please add one, modifying
Authors@R: c(person(given = c("W.", "John"),
family = "Braun",
role = "aut",
email = "john.braun@ubc.ca"),
person(given = "W.J.",
family = "Braun",
role = "cre",
email = "john.braun@ubc.ca"))
as necessary.