Package: cpr 0.4.1

cpr: Control Polygon Reduction

Implementation of the Control Polygon Reduction and Control Net Reduction methods for finding parsimonious B-spline regression models.

Authors:Peter DeWitt [aut, cre], Samantha MaWhinney [ths], Nichole Carlson [ths]

cpr_0.4.1.tar.gz
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cpr_0.4.1.tgz(r-4.6-x86_64)cpr_0.4.1.tgz(r-4.6-arm64)cpr_0.4.1.tgz(r-4.5-x86_64)cpr_0.4.1.tgz(r-4.5-arm64)
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cpr_0.4.1.tgz(r-4.6-emscripten)
manual.pdf |manual.html✨
card.svg |card.png
cpr/json (API)
NEWS

# Install 'cpr' in R:

install.packages('cpr', repos = c('https://dewittpe.r-universe.dev', 'https://cloud.r-project.org'))

Bug tracker:https://github.com/dewittpe/cpr/issues

Pkgdown/docs site:https://www.peteredewitt.com

Uses libs:

openblas– Optimized BLAS
c++– GNU Standard C++ Library v3

Datasets:

spdg - Simulated Pregnanediol glucuronide (PDG) Data
us_covid_cases - United States Laboratory Confirmed COVID-19 Cases

On CRAN:

openblas cpp

6.21 score 2 stars 1 packages 67 scripts 264 downloads 2 mentions 29 exports 57 dependencies

Last updated from:bf1eba9aba. Checks:13 OK. Indexed: yes.

Target	Result	Time
linux-devel-arm64	OK	281
linux-devel-x86_64	OK	305
source / vignettes	OK	405
linux-release-arm64	OK	279
linux-release-x86_64	OK	296
macos-release-arm64	OK	218
macos-release-x86_64	OK	383
macos-oldrel-arm64	OK	159
macos-oldrel-x86_64	OK	384
windows-devel	OK	281
windows-release	OK	226
windows-oldrel	OK	218
wasm-release	OK	188

Exports:bsplineD bsplines btensor build_tensor cn cnr coarsen_ordinate cp cp_diff cp_value cpr d_order_statistic get_spline get_surface hat_ordinate influence_of influence_of_iknots influence_weights insert_a_knot insertion_matrix matrix_rank p_order_statistic refine_ordinate sign_changes trimmed_quantile update_bsplines update_btensor wiegh_iknots wiggle

Dependencies:base64enc boot bslib cachem cli cpp11 digest evaluate farver fastmap fontawesome fs ggplot2 glue gtable highr htmltools htmlwidgets isoband jquerylib jsonlite knitr labeling lattice lifecycle lme4 magrittr MASS Matrix memoise mime minqa misc3d nlme nloptr plot3D R6 rappdirs rbibutils RColorBrewer Rcpp RcppArmadillo RcppEigen Rdpack reformulas rgl rlang rmarkdown S7 sass scales tinytex vctrs viridisLite withr xfun yaml

Control Polygon Reduction

Peter E. DeWitt

Rendered fromcpr.Rmdusingknitr::rmarkdownon May 08 2026.

Last update: 2026-01-07
Started: 2023-12-15

Tensor Products of B-Splines, Control Nets, and Control Net Reduction

Peter E. DeWitt

Rendered fromcnr.Rmdusingknitr::rmarkdownon May 08 2026.

Last update: 2025-12-23
Started: 2023-12-15

Citation

Development and contributors

Readme and manuals

Help Manual

Help page	Topics
B-spline Derivatives	bsplineD
B-Splines	bsplines
btensor	btensor
Build Tensor	build_tensor
Control Nets	cn cn.cpr_bt cn.formula
Control Net Reduction	cnr
Extract Regression Coefficients for B-Splines and Tensor Products of B-splines	coef_vcov
Control Polygons	cp cp.cpr_bs cp.formula
Vertical Difference between two Control Polygons	cp_diff
Control Polygon Value	cp_value
Control Polygon Reduction	cpr
Defunct Functions	coarsen_ordinate cpr-defunct hat_ordinate influence_of influence_weights insertion_matrix refine_ordinate wiegh_iknots
Generate Control Polygon Formula and Data	generate_cp_formula_data
Get the Control Polygon and the Spline Function	get_spline
Get Surface	get_surface
Internal Knots or Degrees of Freedom	iknots_or_df
Determine the influence of the internal knots of a control polygon	influence_of_iknots influence_of_iknots.cpr_cn
Insert a Knot into a Control Polygon	insert_a_knot
Knot Expressions	knot_expr
Determine the (quasi) Log Likelihood for a regression object.	loglikelihood
Rank of a Matrix	matrix_rank
New Knots for CPs and CNs in CPR and CNR	newknots
Distribution of Order Statistics	d_order_statistic order_statistics p_order_statistic
Plot B-spline Basis	plot.cpr_bs
Plotting Control Nets	plot.cpr_cn
Control Net Reduction Plots	plot.cpr_cnr
Plotting Control Polygons	plot.cpr_cp
Control Polygon Reduction Plots	plot.cpr_cpr
Plotting Summaries of Control Polygon Reductions	plot.cpr_summary_cpr_cpr
Model Prediction	predict.cpr_cp
Print bsplines	print.cpr_bs
Sign Changes	sign_changes
Simulated Pregnanediol glucuronide (PDG) Data	spdg
Summary of Control Net	summary.cpr_cn
Summarize Control Net Reduction Objects	summary.cpr_cnr
Summarize a Control Polygon Object	summary.cpr_cp
Summarize a Control Polygon Reduction Object	summary.cpr_cpr
Trimmed Quantiles	trimmed_quantile
Update bsplines or btensor calls	update_bsplines update_btensor
United States Laboratory Confirmed COVID-19 Cases	us_covid_cases
Wiggliness of a Spline function	wiggle