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conversion factor training and test data

Alberto de la Fuente - CRS4Sep 29, 2009 - 6:07 am

Dear DREAM4 Signaling Network Challenge organizers, I have a question about the following: "(d) Comparability between training and test sets. The lysate concentration used for the measurements of the training data set (contained in the file SignalingNetworkChallenge_TrainingData.csv) was different from the lysate concentration used for the test data set. Therefore, even for the same phosphoprotein and under the same conditions, the measurement in the training and test data sets could be different. This is why we give the value of the measurement at t=0, as these values could, in principle, be different from the values at t=0 for similar conditions in the training set. Therefore, the predictions at t=30 min have to take into account the baseline value at t=0 of the test set rather than equivalent measurements in the training set." You state 'similar' and 'equivalent' experiments, but all the experiments in the training data are different from those in the test data. Why not simply provide at least one identical experiment in both lysate concentrations to calculate the conversion factor of the baseline levels or just give the conversion factor? It would be ironic if this little issue will spoil someones predictions....


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