scuba (version 1.1-9)

showstates: Interactive Display of Diver Saturation

Description

Plots a dive profile and interactively displays the diver's nitrogen saturation state at any intermediate stage indicated by the mouse.

Usage

showstates(d, model="DSAT")

Arguments

d

The dive. An object of class "dive".

model

The name of a decompression model: one of "DSAT", "USN", "Workman" or "ZH-L16A" (partially matched).

Value

• The vector of nitrogen tensions (in ata) in the most recently clicked stage.

Details

An object of class "dive" represents a scuba dive. It is created by the command dive.

This function plots the dive using plot.dive then waits for the user to click on the plot. This click selects a time during the dive. The algorithm computes the nitrogen tensions in the tissues at the indicated time, using haldane, and plots them as a bar graph. The cumulative oxygen toxicity is also computed using oxtox.

Note that the bar graph shows the relative nitrogen tensions in each compartment, that is, the tissue nitrogen tension divided by the "surfacing M-value" (tissue maximum nitrogen tension for a no-decompression dive at sea level). If model is "DSAT" or "USN", the model parameters are extracted from the corresponding entries in the datasets Halftimes and Mvalues. If model="Workman" the model parameters are extracted from the dataset Workman65. If model="ZH-L16A" the model parameters are extracted from the dataset BuehlmannL16A.

See Also

dive, haldane, oxtox

Examples

showstates(dive(c(30,20)), "ZH")