Thank you for your answers. I succeed to extract two tables, one with two colums with cell sequence (UMI) associated with its cell label (CD4, CD8, DC etc...) and another with gene expression per cell sequence.
In case if someone is getting the same problem I use this command in R to write it in two files :
Cell Sequence and Cell Label (pmbc is my data)
write.table([email protected], file="Convert_UMI_Label.tsv", quote=FALSE, sep='t', col.names = TRUE)
Gene counts per cell
write.table([email protected][["RNA"]]@counts, file="Gene_Count_per_Cell.tsv", quote=FALSE, sep='t', col.names = TRUE)
After I used a little script in Python to merge these two files getting Gene Counts per cell labeled with their cell type 🙂 (I could surely do it in R but my knowledge in this language is limited).
Visit this page it explains how to extract some interessant content from seurat object : satijalab.org/seurat/v3.0/interaction_vignette.html