morse

morse2

Confusion percentages between Morse code signals. The scores are derived 
from confusion rates on 36 Morse code signals (26 for the alphabet; 10 for the numbers 
0,...,9). Each Morse code signal is a sequence of up to five 'beeps'. The beeps can be 
short (0.05 sec) or long (0.15 sec), and, when there are two or more beeps in a signal, 
 they are separated by periods of silence (0.05 sec).<p></p><p>Rothkopf asked 598 subjects to judge whether two signals, presented acoustically one 
after another, were the same or not. The values are the average percentages with which 
the answer 'Same!' was given in each combination of row stimulus i and column stimulus j, 
where either i or j was the first signal presented. The values are 1 minus the 
symmetrized confusion rates and are thus dissimilarities.</p>

datasets

Provides the following approaches for multidimensional scaling (MDS) based on stress minimization by means of majorization (smacof): basic MDS on symmetric dissimilarity matrices,
MDS with external constraints on the configuration, individual difference scaling (idioscal, indscal, and friends), MDS with spherical restrictions, and unfolding. The MDS type can be ratio, interval, ordinal, and monotone splines.
Various tools and extensions like jackknife MDS, permutation tests, gravity models, inverse MDS, unidimensional scaling, classical scaling, and Procrustes.

morse: Morse Code Confusion Data

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