<=  Bread text subpage  

  Overview  =>

Sailor Logbook S App manual
History mainpage - Pie chart subpage

Local TOC

General (toc)

The Pie chart is based on the Charts library licensed under Apache License 2.0 - Copyright 2015 Daniel Cohen Gindi & Philipp Jahoda.

Use it for analysis of sailing, weather and sea conditions. A precondition for its benefit is, that you register these conditions when cruising.

The picker panel (toc)

It's possible to chart registered values of all attribute types, by selecting one of these items in the picker panel at the top of the page:

The presence of all ten options above is independant on the settings of the switches in the Use event attributes page.

Calculation rules (toc)

Each type of attribute can have several discrete values, as shown in e.g. the Pickerscreen example. The distribution of these values are shown in the corresponding chart. Calculations follow these rules:

*) Check description of assumption switches in The switches section.

Examples (toc)

Below a series of screenshots of charts follow. Registrations from the first 6 tracks of the Appetizer 2: roundtrip through Sweden were used:

Example 1: chart for sails shown in percent (toc)

An example of the Pie chart

48 perent of the time, full sails were worn. Pie slices always represent non-zero values - so to reveal what the zero display for Sails, 2.reef means, the unit selector button   Pct->Days   in the green navigation bar at the top as tapped once (becoming a   Days->Hrs   button), twice (becoming a   Hrs->Mins   button), and finally a third time to show:

Example 2: chart for sails shown in minutes (toc)

An example of the Pie chart

It appears, that Sails, 2.reef was the situation during 8 minutes (was rounded to zero percent above).

Example 3: wind directions (toc)

An example of the Pie chart

where the -?- stands for unset / no registration (3 percent of the time).

Example 4: wind forces (toc)

An example of the Pie chart

Example 5: changing color (toc)

Pie slice colors are random and change each time the chart is displayed. If a chart is hard to read because of unfortunate choise of colors, use the   Color   button to select another set:

An example of the Pie chart

Example 6: turning and highlighting (toc)

A chart can be turned, and any slice highlighted:

An example of the Pie chart

Example 7: empty chart when no data (toc)

If nothing was registered for an attribute type for tracks in the given time range, the chart turns monochrome:

An example of the Pie chart

In this case, no current direction was registered for a single track (day), so the label is -?-. This is not the same as actively registering no current, which is represented as nil.

Active registration of nil is possible for:


Sailor Logbook S App manual - © Copyright 2018 CoaSoft ApS Denmark

<=  Bread text subpage  

  Overview  =>

Sailor Logbook S App manual
History mainpage - Pie chart subpage