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sitar
Growth curve analysis
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Install
install.packages('sitar')
Monthly Downloads
670
Version
1.4.0
License
GPL (>= 2)
Issues
2
Pull Requests
0
Stars
13
Forks
2
Repository
https://github.com/statist7/sitar
Maintainer
Tim Cole
Last Published
June 23rd, 2023
Functions in sitar (1.4.0)
Search functions
deren
Deren prevalence data on child thinness, overweight and obesity
dfset
Find degrees of freedom for a natural spline curve to minimise BIC or AIC
getPeakTrough
Identify peak or trough on curve
sitar-package
SITAR (SuperImposition by Translation And Rotation) growth curve analysis
ifun
Invert an expression defining a data transformation
ob_convertr
Convert between IOTF, WHO and CDC prevalence rates for child thinness, overweight and obesity
sitar
Fit SITAR growth curve model
dfpower
Tabulate BIC of SITAR models by degrees of freedom, fixed effects and xy power transformations
%>%
Pipe operator
pdLMS
Plot frequency distributions(s) for given L, M and S values in LMS method
funcall
Function call with optional inverse
optimal_design
Optimal design for growth reference centile studies
xaxsd
Par args xaxs and yaxs option d
plotclean
Plot multiple growth curves to identify outliers
velout
Identify outliers with abnormal velocity in growth curves
plot.sitar
Plot SITAR model
xyadj
Adjust x and y variables for SITAR random effects
who0607
The WHO 2006 growth standard and WHO 2007 growth reference
ukwhopt
UK-WHO growth reference including preterm
print.sitar
Print SITAR model
who06
The WHO 2006 growth standard
predict.sitar
Predict SITAR model
ukwhoterm
UK-WHO growth reference omitting preterm data
timegap
Select equally spaced ages from a vector of ages
uk90
UK 1990 growth reference
iotf
IOTF international body mass index reference
mplot
Plot multiple growth curves
z2cent
Express z-scores as centile character strings for plotting
subsample
Sample from SITAR dataset
print.summary.sitar
Print summary of SITAR model
recalib
Recalibrate x, y data using SITAR random effects
summary.sitar
Create summary of SITAR model
bupdate
Update the b fixed effect to minimise the b-c random effect correlation
codeplot
Plot and zap velocity outliers in growth curves
apv_se
Bootstrap standard errors for SITAR peak velocity and age at peak velocity
anova.sitar
Compare Likelihoods of Fitted SITAR Objects
berkeley
The Berkeley Child Guidance Study
LMS2z
Convert to/from measurement from/to z-score with growth reference
LMSfit
Estimate LMS curves from tabulated growth reference centiles
BICadj
Ways to compare SITAR models for fit
cLMS
LMS conversion to and from z-scores
cdc2000
The CDC 2000 growth reference
getData.sitar
Extract elements of fitted SITAR models
heights
Serial heights measured in 12 girls