cellchat@data.signaling 0 x 12257 sparse Matrix of class "dgCMatrix"

[changtongwa]

I meet a question that when i build a CellCall file
cellchat = createCellChat(object = T_cells1,meta =T_cells1@meta.data, group.by = "celltype")

and find
cellchat@data 21247 x 12257 sparse Matrix of class "dgCMatrix"
but
cellchat@data.signaling 0 x 12257 sparse Matrix of class "dgCMatrix"

Hope you can give me a hand,thank you.

[changtongwa]

sorry,I find the question is silly.THANK YOU

[changtongwa]

I build a CellCall file through seurat ,but there is a error

cellchat <- identifyOverExpressedGenes(cellchat)

Error : in identifyOverExpressedGenes(cellchat) : Please check object@data.signaling and ensure that you have run subsetData and that the data matrix object@data.signaling looks OK.

so does it mean I have to get signaling before I build the CellCall file ?