The notion of "independence indices" yields a novel measure of correlation for Lévy laws.
In November and December, a common measure of correlation within the Standard & Poor's benchmark 500-stock index reached as high as 90 percent, the highest since 1996, according to Barclays calculations.
For much of the decade leading up to the financial crisis in 2008, the measure of correlation between the 50 biggest stocks in the S.& P. 500 generally stayed between 10 percent and 40 percent.
This algorithm operates akin to a greedy approach and relies on the assessment of a measure of correlation for the selection of the formal concepts to be retained in the final coverage.
(The so-called R-squared measure of correlation is 0.90, where 1.0 would mean marching in lockstep).
The most common measure of correlation is the Pearson Product Moment Correlation (called Pearson's correlation for short "r").
In the sequel, we define a measure of correlation between subcarriers, that we call sum-correlation function, and we derive its properties.
To accommodate for potential nonlinearities in the relationships between different variables we always used Spearman rank coefficient as a measure of correlation.
It is a non-parametric measure of correlation, and it is used as a measure of linear relationship between two sets of ranked data, instead of the actual values.
Out of all imaging variables tested, the information measure of correlation 1, which quantifies spatial dependency in neighboring voxels of the tumor, showed the highest predictive value of upstaging with an area under the curve (AUC) = 0.719 (95% confidence interval [CI]: 0.609-0.829).
The HEIP of tumour internal enhancement could not be replicated with a reasonable degree of accuracy using CEIP of tumour enhancement; the AUC associated with the best model as identified through ten-fold cross-validation, which involved energy, entropy, information measure of correlation, maximum correlation coefficient, sum of average, sum of entropy, and sum of squares, was 0.551 (p = 0.263).
