Why I should sorted in descending order of survival/censoring time.

[FiresWorker]

Hi, I have a question, I don't know why I should requires that all subjects in the input batch must be sorted in descending order of survival/censoring time. This makes me very confused. Thank you very much for answering this question for me

[ghalib-bello]

Hi FiresWorker, please see explanation for this in code/trainDL.ipynb, under Section 4

[FiresWorker]

Hi ghalib-bello, thank you so much for answering my question.
Section 4 said the sort is because of cumsum.
Actually I'm used to using pytorch, should I do the sort?

[ghalib-bello]

depends on how you choose to implement the partial likelihood function in pytorch

[FiresWorker]

This is helpful for me to implement the survival loss in pytorch, thank you.