User: Susan Bosco

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Susan Bosco80
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9 years, 8 months ago
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9 years, 11 months ago
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Posts by Susan Bosco

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Comment: C: Seeking assistance on ROC
... Dear Sean, Thanks again. I corrected the script changing the value of 'truth' variable with rbinom() function. Since my data size is quite large(data is of 244K),I tried with the first 200,for which I was able to find proper ROC curve. However, when I include the complete data, the plot changes. F ...
written 9.7 years ago by Susan Bosco80
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Answer: A: Seeking assistance on ROC
... Dear Sean, Thanks again. I corrected the script changing the value of 'truth' variable with rbinom() function. Since my data size is quite large(data is of 244K),I tried with the first 200,for which I was able to find proper ROC curve. However, when I include the complete data, the plot changes. F ...
written 9.7 years ago by Susan Bosco80
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Answer: A: Seeking assistance on ROC
... Dear Sean, Thank you so much for  the help. I tried with a range of thresholds from 0-0.9..As you had mentioned,the true positive rates no doubt increased with thresholds below 0.9.However I did get some false positive rates even at a minimum threshold of 0.1.Could you kindly explain the reason? ...
written 9.7 years ago by Susan Bosco80
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Seeking assistance on ROC
... Dear friends, I have been trying to perform ROC analysis with ROCR. Since there is not much support for the queries I have switched to ROC package of Bioconductor. I'm trying to perform ROC analysis on Methylation data obtained from MeDiP experiment.The data set has values ranging from 0 to as lar ...
genetics roc written 9.8 years ago by Susan Bosco80
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Help on ROCR analysis
... Dear sir/madam, I'm a masters student at Manipal University,India,and am doing methylation data analysis.I subjected the data obtained to ROCR analysis using the commands: pred <- prediction(predictions, labels) perf <- performance(pred, measure = "tpr", x.measure = "fpr") plot(perf, col=ra ...
genetics assign written 9.8 years ago by Susan Bosco80 • updated 9.8 years ago by Wolfgang Huber13k
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Help on ROC analysis
... Dear sir/madam, I subjected the data obtained from MEDME package to ROCR analysis as suggested using these commands: pred <- prediction(predictions, labels) perf <- performance(pred, measure = "tpr", x.measure = "fpr") plot(perf, col=rainbow(10)) A brief set of "prediction" values in the ...
genetics medme assign written 9.8 years ago by Susan Bosco80
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Help on ROC Analysis
... To the concerned, I'm a student doing my masters degree at MU,Manipal. I have to analyze data derived from MeDIP microarray experiment.This is how my data looks after applying the MEDME package. GeneSymbol    Sample1       Sample2     Sample3     Sample4 P53                    1.1012            1.0 ...
genetics roc medme written 9.8 years ago by Susan Bosco80 • updated 9.8 years ago by Sean Davis21k
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Help to understand logistic model used in MEDME
... Dear sir, In the four parameter logistic model used in MEDME algorithm, M = f mCpGwbini, (a,b,c,d) + Ɛ         =  b +       c - b              + Ɛ                      1 + expa∗(log mCpGwbini - logd) What do the symbol "Ɛ" and parameters a,b,c,d sign ...
genetics medme written 9.9 years ago by Susan Bosco80 • updated 9.9 years ago by Tim Triche4.2k

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