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sitar

Growth curve analysis

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Install

install.packages('sitar')

Monthly Downloads

437

Version

1.1.2

License

GPL (>= 2)

Issues

3

Pull Requests

0

Stars

14

Forks

3

Maintainer

Tim Cole

Last Published

February 17th, 2020

Functions in sitar (1.1.2)

codeplot

Plot and zap velocity outliers in growth curves
berkeley

The Berkeley Child Guidance Study
apv_se

Bootstrap standard errors for SITAR peak velocity and age at peak velocity
anova.sitar

Compare Likelihoods of Fitted SITAR Objects
mplot

Plot multiple growth curves
cLMS

LMS conversion to and from z-scores
cdc2000

The CDC 2000 growth reference
BICadj

Ways to compare SITAR models for fit
funcall

Function call with optional inverse
bupdate

Update the b fixed effect to minimise the b-c random effect correlation
LMSfit

Estimate LMS curves from tabulated growth reference centiles
getData.sitar

Extract elements of fitted SITAR models
getPeakTrough

Identify peak or trough on curve
pdLMS

Plot frequency distributions(s) for given L, M and S values in LMS method
dfset

Find degrees of freedom for a natural spline curve to minimise BIC or AIC
dfpower

Tabulate BIC of SITAR models by degrees of freedom and xy power transformations
LMS2z

Convert to/from measurement from/to z-score with growth reference
predict.sitar

Predict SITAR model
heights

Serial heights measured in 12 girls
subsample

Sample from SITAR dataset
xyadj

Adjust x and y variables for SITAR random effects
print.sitar

Print SITAR model
sitar

Fit SITAR growth curve model
sitar-package

SITAR (SuperImposition by Translation And Rotation) growth curve analysis
plot.sitar

Plot SITAR model
timegap

Select equally spaced ages from a vector of ages
summary.sitar

Create summary of SITAR model
plotclean

Plot multiple growth curves to identify outliers
xaxsd

Par args xaxs and yaxs option d
z2cent

Express z-scores as centile character strings for plotting
who0607

The WHO 2006 growth standard and WHO 2007 growth reference
ukwhoterm

UK-WHO growth reference omitting preterm data
ukwhopt

UK-WHO growth reference including preterm
velout

Identify outliers with abnormal velocity in growth curves
ifun

Invert an expression defining a data transformation
print.summary.sitar

Print summary of SITAR model
recalib

Recalibrate x, y data using SITAR random effects
iotf

IOTF international body mass index reference
who06

The WHO 2006 growth standard
uk90

UK 1990 growth reference