更新时间:2023-12-01 12:06:58
这只是一种扩充,不是吗?
This is just an augmentation, isn't it?
X <- as.matrix(x) rbind(cbind(diag(nrow(X)), X), cbind(t(X), diag(ncol(X))))
数据帧变成对称矩阵,同时保留所有行和列