Cycle Plotter

This command-line tool reads data from an Apple Health or Withings Health Mate export, and creates a plot of cycle durations.

On the x-axis, we have the date at the beginning of a cycle.

On the y-axis, we have the duration of the cycle. The duration of a cycle is the number of days between its start, and the start of the next cycle.

Sample graphs

The datasets for these graphs were generated by ChatGPT. They don't corespond to any real person.

Regular cycles

Cycles covering a period of 6 months, with little variation in cycle length.

Pregnancy

Cycles covering a period of just over one year, with a pregnancy during that time.

--axis x	--axis y	--axis both (default)

Usage

Run the program with the --help argument to see the full usage.

% python -m cycleplotter.main --help
usage: main.py [-h] -i INPUT_FILE -o OUTPUT_FILE -s {apple,withings} [-a {x,y,both}] [-d DIMENSIONS]

options:
  -h, --help            show this help message and exit
  -i INPUT_FILE, --input-file INPUT_FILE
                        path to archive exported from
                        Apple Health or Withings Health Mate
  -o OUTPUT_FILE, --output-file OUTPUT_FILE
                        path to image file to export
  -s {apple,withings}, --source {apple,withings}
  -a {x,y,both}, --axis {x,y,both}
                        Indicate the cycle durations on:

                        x: the x-axis, by horizontal spacing between points
                        y: the y-axis, by their values
                        both: both axes

                        Default both.
  -d DIMENSIONS, --dimensions DIMENSIONS
                        The size of the image to create.

                        Supported values are:
                          a4
                          letter
                          <width>x<height><unit>

                        Supported units are in, cm, and px.

                        Example: 600x400px

                        Default a4.

The program has been tested exporting to png and pdf. But other formats are probably supported. The program uses matplotlib to output the image. The supported file formats may be in the matplotlib documentation.

Examples:

Export a png of data from Apple Health, using long arguments:

python -m cycleplotter.main --input-file ~/Downloads/export.zip  --output-file /tmp/cyclegraph.png --source apple

Export a pdf of data from Withings Health Mate, using short arguments:

python -m cycleplotter.main -i ~/Downloads/data_ABC_1717249954.zip  -o /tmp/cyclegraph.pdf -s withings

How to get the health data files

See the steps here.