12345678910111213141516171819202122232425262728293031323334353637383940 |
- function pval = circ_symtest(alpha)
- %
- % [pval, z] = circ_symtest(alpha,w)
- % Tests for symmetry about the median.
- % H0: the population is symmetrical around the median
- % HA: the population is not symmetrical around the median
- %
- % Input:
- % alpha sample of angles in radians
- %
- % Output:
- % pval p-value
- %
- % PHB 3/19/2009
- %
- % References:
- % Biostatistical Analysis, J. H. Zar, 27.4
- %
- % Circular Statistics Toolbox for Matlab
- % By Philipp Berens, 2009
- % berens@tuebingen.mpg.de - www.kyb.mpg.de/~berens/circStat.html
- if size(alpha,2) > size(alpha,1)
- alpha = alpha';
- end
- % compute median
- md = circ_median(alpha);
- % compute deviations from median
- d = circ_dist(alpha,md);
- % compute wilcoxon sign rank test
- pval = signrank(d);
|