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Transcriptional Characterization of Glioma Neural Stem Cells Diva ...

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8.5 Target Prediction Ensemble Analysis Results<br />

Figure 8.4: Step by step diagram <strong>of</strong> the ensemble method adopted to find the<br />

score E (=C2/C1) <strong>of</strong> prediction accuracy for prediction algorithms. The method<br />

was applied to the predictions from all combinations <strong>of</strong> target prediction algorithms<br />

and an E-score was generated for each one. The red set <strong>of</strong> gene predictions varied<br />

in size depending on how many and which algorithms were being considered for a<br />

particular round.<br />

predicting than the single, we performed the same steps 1-7 but with lists that<br />

resulted as the union <strong>of</strong> all the user-defined prediction algorithm genes (vary-<br />

ing size <strong>of</strong> the predicted genes set <strong>of</strong> figure 8.4). The results are listed in table<br />

8.5. The purpose <strong>of</strong> the hit list is to "weight" the importance to the predicted<br />

genes. For example, if gene A has been predicted to be targeted by only nine<br />

<strong>of</strong> the 258 microRNAs, its weight when added to the cumulative score C1 will<br />

be only 9/258th the weight added by gene B, if gene B were predicted to be<br />

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