I want to check that my R data are reading correctly into Stan. In Stan I would like to work with arrays of length V made up of vectors of length D. Following past guidance this is said to be VxD array so I wrote that into my data list in R, as below:

```
stan_data <- list(
D = 3,
V = 2,
dat = array(c(c(1,2,3), c(1,2,3)), dim=c(V,D))
)
```

prints as

```
[,1] [,2] [,3]
[1,] 1 3 2
[2,] 2 1 3
```

and does not look great in R but, but I have read elsewhere that to read into an array of vectors VxD that is how the dims should be written in R.

For Stan code I have

```
write("data {
int<lower=0> D; // vector length inside array
int<lower=0> V; // length of array
array[V] vector[D] dat;
}
generated quantities {
print(dat);
}",
"test.stan")
```

Which prints the same as the R input as `[[1,3,2],[2,1,3]] `

But if I try to switch the order of the input array to read more true to expectations:

```
stan_data <- list(
D = 3,
V = 2,
dat = array(c(c(1,2,3), c(1,2,3)), dim=c(D,V))
)
```

with output

```
[,1] [,2]
[1,] 1 1
[2,] 2 2
[3,] 3 3
```

and run with the same Stan code I get the error `mismatch in dimension declared and found in context; processing stage=data initialization; variable name=dat; position=0; dims declared=(2,3); dims found=(3,2)`

.

How can I rearrange things to get my expected Stan output of `[[1,2,3],[1,2,3]] `

?