bmi_internal

percentile_age

percentile_BMI

percentile_index

percentile_lms

percentile_reference

percentile_sex

percentile_z

percentile_back_calculate

Internal helper functions for <code>get_BMI_percentile</code>

internal

A collection of utilities that are useful for a broad range of
tasks that are common in physical activity research, including the
following: creation of Bland-Altman plots, formatted descriptive
statistics, metabolic calculations (e.g. basal metabolic rate predictions)
and conversions, demographic calculations (age and age-for-body-mass-index
percentile), bout analysis of moderate-to-vigorous intensity physical
activity, and analysis of bout detection algorithm performance.

Paul Hibbins

PAutilities

Streamline Physical Activity Research

Centers for Disease Control and Prevention 

bmi_internal function

<dl><dt>age_mos</dt>
<dd>age in months (optional)</dd>
<dt>age_yrs</dt>
<dd>age in years</dd>
<dt>BMI</dt>
<dd>numeric. Body mass index</dd>
<dt>weight_kg</dt>
<dd>Weight in kilograms</dd>
<dt>height_cm</dt>
<dd>height in centimeters</dd>
<dt>reference</dt>
<dd>reference subset for calculations</dd>
<dt>colname</dt>
<dd>character. Column name of <code>reference</code> on which to operate</dd>
<dt>lesser_index</dt>
<dd>lower match index of <code>reference</code></dd>
<dt>greater_index</dt>
<dd>upper match index of <code>reference</code></dd>
<dt>increment</dt>
<dd>proportional distance between
<code>reference[lesser_index, ]</code> and <code>reference[greater_index, ]</code></dd>
<dt>sex</dt>
<dd>Character scalar indicating participant's sex</dd>
<dt>L</dt>
<dd>lambda</dd>
<dt>M</dt>
<dd>mu</dd>
<dt>S</dt>
<dd>sigma</dd>
<dt>p</dt>
<dd>percentile for which to back-calculate a BMI (must be between 0 and
1)</dd></dl>

Arguments

Internal helper functions for get_BMI_percentile — bmi_internal

<dl>

<dt>age_mos</dt>
<dd>age in months (optional)</dd>


<dt>age_yrs</dt>
<dd>age in years</dd>


<dt>BMI</dt>
<dd>numeric. Body mass index</dd>


<dt>weight_kg</dt>
<dd>Weight in kilograms</dd>


<dt>height_cm</dt>
<dd>height in centimeters</dd>


<dt>reference</dt>
<dd>reference subset for calculations</dd>


<dt>colname</dt>
<dd>character. Column name of <code>reference</code> on which to operate</dd>


<dt>lesser_index</dt>
<dd>lower match index of <code>reference</code></dd>


<dt>greater_index</dt>
<dd>upper match index of <code>reference</code></dd>


<dt>increment</dt>
<dd>proportional distance between
<code>reference[lesser_index, ]</code> and <code>reference[greater_index, ]</code></dd>


<dt>sex</dt>
<dd>Character scalar indicating participant's sex</dd>


<dt>L</dt>
<dd>lambda</dd>


<dt>M</dt>
<dd>mu</dd>


<dt>S</dt>
<dd>sigma</dd>


<dt>p</dt>
<dd>percentile for which to back-calculate a BMI (must be between 0 and
1)</dd>

</dl>

Internal helper functions for <code>get_BMI_percentile</code>

bmi_internal: Internal helper functions for `get_BMI_percentile`

Description

Usage

Arguments

See Also