Hi, have you considered using array, for example example<-array(1,dim=c(2,2,3)) dimnames(example)<-list(c("x1","x2"),c("y1","y2")) then if you want to extract the component "x1","y1" from every member of the list of matrices you have to example["x1","y1",] leaving blank in the last position. hope it helps. Victor
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