Super Imposition by Translation and Rotation Growth Curve Analysis

---

Documentation for package ‘sitar’ version 1.4.0

• DESCRIPTION file.
• User guides, package vignettes and other documentation.
• Package NEWS.

Help Pages

sitar-package	SITAR (SuperImposition by Translation And Rotation) growth curve analysis
AICadj	Ways to compare SITAR models for fit
anova.sitar	Compare Likelihoods of Fitted SITAR Objects
apv_se	Bootstrap standard errors for SITAR peak velocity and age at peak velocity
berkeley	The Berkeley Child Guidance Study
BICadj	Ways to compare SITAR models for fit
bupdate	Update the b fixed effect to minimise the b-c random effect correlation
cdc2000	The CDC 2000 growth reference
cLMS	LMS conversion to and from z-scores
codeplot	Plot and zap velocity outliers in growth curves
deren	Deren prevalence data on child thinness, overweight and obesity
dfpower	Tabulate BIC of SITAR models by degrees of freedom, fixed effects and xy power transformations
dfset	Find degrees of freedom for a natural spline curve to minimise BIC or AIC
diffid	Select equally spaced ages from a vector of ages
funcall	Function call with optional inverse
getCovariate.sitar	Extract elements of fitted SITAR models
getData.sitar	Extract elements of fitted SITAR models
getL	Ways to compare SITAR models for fit
getPeak	Identify peak or trough on curve
getPeakTrough	Identify peak or trough on curve
getTakeoff	Identify peak or trough on curve
getTrough	Identify peak or trough on curve
getVarCov.sitar	Extract elements of fitted SITAR models
heights	Serial heights measured in 12 girls
ifun	Invert an expression defining a data transformation
iotf	IOTF international body mass index reference
lines.sitar	Plot SITAR model
LMS2z	Convert to/from measurement from/to z-score with growth reference
LMSfit	Estimate LMS curves from tabulated growth reference centiles
mplot	Plot multiple growth curves
n_agegp	Optimal design for growth reference centile studies
ob_convertr	Convert between IOTF, WHO and CDC prevalence rates for child thinness, overweight and obesity
ob_convertr2	Convert between IOTF, WHO and CDC prevalence rates for child thinness, overweight and obesity
optimal_design	Optimal design for growth reference centile studies
pdLMS	Plot frequency distributions(s) for given L, M and S values in LMS method
plot.sitar	Plot SITAR model
plotclean	Plot multiple growth curves to identify outliers
plot_a	Plot SITAR model
plot_c	Plot SITAR model
plot_D	Plot SITAR model
plot_d	Plot SITAR model
plot_u	Plot SITAR model
plot_V	Plot SITAR model
plot_v	Plot SITAR model
predict.sitar	Predict SITAR model
print.sitar	Print SITAR model
print.summary.sitar	Print summary of SITAR model
recalib	Recalibrate x, y data using SITAR random effects
sitar	Fit SITAR growth curve model
subsample	Sample from SITAR dataset
summary.sitar	Create summary of SITAR model
timegap	Select equally spaced ages from a vector of ages
timegap.id	Select equally spaced ages from a vector of ages
uk90	UK 1990 growth reference
ukwhopt	UK-WHO growth reference including preterm
ukwhoterm	UK-WHO growth reference omitting preterm data
update.sitar	Fit SITAR growth curve model
varexp	Ways to compare SITAR models for fit
velout	Identify outliers with abnormal velocity in growth curves
who06	The WHO 2006 growth standard
who0607	The WHO 2006 growth standard and WHO 2007 growth reference
xaxsd	Par args xaxs and yaxs option d
xyadj	Adjust x and y variables for SITAR random effects
yaxsd	Par args xaxs and yaxs option d
z2cent	Express z-scores as centile character strings for plotting
zapvelout	Plot and zap velocity outliers in growth curves
zLMS	LMS conversion to and from z-scores