Generate WHO Child Growth Standards charts with percentile curves and child data overlay.

Features

Height-for-age (0-19 years)
Weight-for-age (0-10 years)
BMI-for-age (0-19 years)
Supports boys and girls
Downloads WHO data on demand from cdn.who.int (cached locally)
Overlays child's actual measurements with trend line

Examples

Height	Weight	BMI
<img src="examples/anna_height.png" width="250">	<img src="examples/anna_weight.png" width="250">	<img src="examples/anna_bmi.png" width="250">

Prerequisites

Install Python dependencies:

pip install pandas matplotlib scipy openpyxl

Usage

Basic Chart Generation

python3 ./scripts/growth_chart.py "Child Name" "DD.MM.YYYY" --sex F --type all

Arguments:

```
name
```
: Child's name (used in chart title)
```
birthdate
```
: Date of birth in DD.MM.YYYY format
```
--sex
```
/
```
-s
```
:
```
F
```
(female) or
```
M
```
(male) — default: F
```
--type
```
/
```
-t
```
:
```
height
```
,
```
weight
```
,
```
bmi
```
, or
```
all
```
— default: all
```
--data
```
/
```
-d
```
: JSON file with measurement data
```
--output
```
/
```
-o
```
: Output directory for charts

With Measurement Data

Create a JSON file with height/weight measurements (heights in meters, weights in kg):

{
  "heights": [ ["2024-01-15T10:00:00", 1.05] ],
  "weights": [ ["2024-01-15T10:00:00", 17.5] ]
}

python3 ./scripts/growth_chart.py "Emma" "06.07.2016" --sex F --data emma_data.json --type all

Integration with Withings

Combine with

withings-family

skill to fetch weight data automatically:

# Get Withings weight data (assuming withings-family skill is installed)
python3 ../withings-family/scripts/withings.py emma body > /tmp/withings.json
Parse and generate charts
(The growth chart script handles Withings JSON format if implemented, otherwise transform it)

Output

By default, charts and cache are written to:

```
<workspace>/who-growth-charts/
```
```
<workspace>/who-growth-charts/cache/
```

Where

<workspace>

is the folder that contains your

skills/

directory (auto-detected from CWD or script location).

WHO Growth Charts

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Features

Examples

Prerequisites

Usage

Basic Chart Generation

With Measurement Data

Integration with Withings

Parse and generate charts

(The growth chart script handles Withings JSON format if implemented, otherwise transform it)

Output

Quick Start

Manual Installation

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