The data were obtained from the measurements of the luminance
 of the <code>R</code>, <code>G</code> and <code>B</code> channels individually,
 as well as the three together, W, for each of 21 grey levels,
 <code>GL</code> from a screen on which a video projector was displaying
 an image of a uniform field. Grey level has been normalized to
 the interval [0, 1], though originally it is specified as integers
 in [0, 255]. The measurements were obtained with a Photo Research
 650 spectro-radiometer.

datasets

An assortment of functions that could be useful in analyzing data from psychophysical experiments. It includes functions for calculating d' from several different experimental designs, links for m-alternative forced-choice (mafc) data to be used with the binomial family in glm (and possibly other contexts) and self-Start functions for estimating gamma values for CRT screen calibrations.

Ken Knoblauch

psyphy

Functions for Analyzing Psychophysical Data in R

RGB function

A data frame with 84 observations on the following 3 variables.<dl>
 <dt><code>Lum</code></dt>
<dd>numeric vector of the measured luminance
 in candelas/meter\(^2\)</dd> <dt><code>GL</code></dt>
<dd>The grey level normalized to the interval [0, 1]</dd> <dt><code>Gun</code></dt>
<dd>factor with levels <code>R</code> <code>G</code> <code>B</code> <code>W</code></dd> 
</dl>

Format

Luminance Calibration Data from Video Projector — RGB

A data frame with 84 observations on the following 3 variables.<dl>
 <dt><code>Lum</code></dt>
<dd>numeric vector of the measured luminance
 in candelas/meter\(^2\)</dd>

 <dt><code>GL</code></dt>
<dd>The grey level normalized to the interval [0, 1]</dd>

 <dt><code>Gun</code></dt>
<dd>factor with levels <code>R</code> <code>G</code> <code>B</code> <code>W</code></dd>

 
</dl>

RGB: Luminance Calibration Data from Video Projector

Description

Usage

Arguments

Format

Examples