R：稀疏矩阵（simple_triplet_matrix - TextDocumentMatrix）大到要处理的应用

Question

我有TextDocumentMatrix tdm（条款：66779，文档：609551，非稀疏条目：9704315）。我正在尝试使用下面列出的代码处理它：

# 1. counting sum of term values for each document
colTotals = apply(tdm , 2, sum)

# 2. Singular Value Decomposition 
s = svd(as.matrix(tdm), nu = nrow(tdm), nv = ncol(tdm))

# 3. Latent Semantic Analysis (with lsa package)
sp = lsa(tdm)

上面列出的每个调用（1,2,3）都会导致错误：

Error in vector(typeof(x$v), nr * nc) : vector size cannot be NA
In addition: Warning message:
In nr * nc : NAs produced by integer overflow

如何处理如此大的矩阵？