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Question about 'tangram_ct_pred' results for final cell type annotation call

Open KunHHE opened this issue 11 months ago • 0 comments

Hi @ziqlu0722, for Tangram run finished and got 'tangram_ct_pred', I don't feel confident for the downstream analysis step; can you help me a little? Thanks!

For example, should I do normalization for the probability value and then project to cell types? like using the scripts below:

probabilities = np.array(comb_adata.obsm['tangram_pred']) n_voxels = probabilities.shape[0] n_cell_types = probabilities.shape[1]

predicted_cell_types = [XXXX cell types ] assert len(predicted_cell_types) == n_cell_types, f"Mismatch: {len(predicted_cell_types)} vs {n_cell_types}" sampled_cell_types = [] for voxel_idx in range(n_voxels): voxel_probabilities = probabilities[voxel_idx, :] voxel_probabilities /= np.sum(voxel_probabilities) sampled_cell_type_idx = np.random.choice(n_cell_types, p=voxel_probabilities) sampled_cell_type = predicted_cell_types[sampled_cell_type_idx] sampled_cell_types.append(sampled_cell_type) comb_adata.obs['sampled_cell_type'] = sampled_cell_types

KunHHE avatar Jan 15 '25 14:01 KunHHE