thesis - Faculty of Information and Communication Technologies ...

List of Figures
5.11Correlation between Number of Branches and all other measures
in Proguard. Box plots show the range and distribution
of the correlation coefficients over the release history. 122
5.12Evolution of Type Construction Count for ProGuard. . . . . 129
5.13NOB Gini profile for JabRef. . . . . . . . . . . . . . . . . . . 134
6.1 Change evolution in the Hibernate framework. This graph
illustrates change property captured by Equation 6.2.9. . . 148
6.2 Change evolution in the Hibernate framework. This graph
illustrates change property captured by Equation 6.2.10. . 149
6.3 Box plot of system maturity showing distribution of age
(in days since birth) and if the change properties hold.
Graph on the left covers Equation 6.2.9, while the right
side graph covers Equation 6.2.10. . . . . . . . . . . . . . . 150
6.4 Probability of change reduces with system maturity. Graph
on the left indicates the probability that Equation 6.2.9
holds, while the right side graph indicates probability for
Equation 6.2.10. The probabilities were predicted from the
Logistic regression models. Age indicates days since birth. 151
6.5 Cumulative distribution of the modification frequency of
classes that have undergone a change in their lifetime.
The figure only shows some systems from our data set to
improve readability. Systems that are considered outliers
have been shown with dotted lines . . . . . . . . . . . . . . 154
6.6 Number of measures that change for modified classes. x-
axis shows the number of measures that have been modified,
while the y-axis shows the percentage of classes . . . 155
6.7 Spring In-Degree Count evolution. Proportion of modified
classes with high In-Degree Count is greater than that of
new or all classes. . . . . . . . . . . . . . . . . . . . . . . . . 158
6.8 Probability of modification increases as the In-Degree Count
of a class increases. This graph is generated based on predicted
values from the Logistic regression where In-Degree
Count is the independent variable. . . . . . . . . . . . . . . 160
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