Open minghao622 opened 1 week ago
Hi @minghao622!
Thanks for your inquiry! We are currently working on establishing a differential abundance framework that will hopefully make this use case a lot easier. However, to answer your questions:
.fit
method. However, to get density values that you can compare, you will have to evaluate it on the merged dataset with the .predict
method.palantir.utils.run_diffusion_maps
should be run on the PCA of the integrated dataset. Please be aware of the potentially confounding effects of batch-effect correction though. It might be advisable to validate the robustness of any finding with respect to the batch-effect correction method.Please note, we haven’t established the units of the density values produced by mellon. While differences in the log-density values correspond to the predicted log-fold change of cell-state abundance, the absolute values should not be interpreted at this time
Stay tuned for our upcoming work on differential cell-state abundance.
Hello, This is a very good tool! However, I have some questions while running the code. 1, I want to calculate the density changes of a specific cell type subpopulation under different treatments. Should I merge the data from multiple treatments and then run Mellon, or should I run Mellon separately for each treatment? 2, If I were to merge the data of multiple treatments for the process, would I need to integrate the data and then use the integrated PCA for running
palantir.utils.run_diffusion_maps(adata, pca_key="integrated_pca", n_components=30)
? Thanks for any advice.