Can you confirm whether the following is working:
```
cran <- getOption("repos")
cran["dmlc"] <-
"https://apache-mxnet.s3-accelerate.dualstack.amazonaws.com/R/CRAN/";
options(repos = cran)
install.packages("mxnet")
library(data.table)
library(mxnet)
data <- matrix(rnorm(9*5), ncol = 9)
fwrite(x = as.data.table(data), file = "data.csv", col.names = F)
labels <- matrix(rnorm(9*5), ncol = 9)
fwrite(x = as.data.table(data), file = "label.csv", col.names = F)
iter <- mx.io.CSVIter(data_csv = "data.csv",
data_shape = c(9),
label_csv = "label.csv",
label_shape = c(3,1,3),
batch.size = 2)
iter$reset()
iter$iter.next()
iter$value()
```
This has been run on Windows 10 and R 3.5.1 and worked fine.
>From the error message provided `symbol$infer.shape(list(...))`, issue seems
>more related to the network definition.
[ Full content available at:
https://github.com/apache/incubator-mxnet/issues/12428 ]
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