How do I convert a vector column to a primitive array column?

How can I convert a Deephaven vector column to a primitive array column in Deephaven?

You can convert a Deephaven vector column to a primitive array column by using the array() method in a selection method's query string. Similarly, the vec() method can convert a primitive array type to a Deephaven vector type. Here, the array method converts an IntVector column to an int[] array. Here's an example:

from deephaven import empty_table

# Create a table with an IntVector column
t = empty_table(10).update(["X = i%2", "Y = i"]).group_by("X")
tm = t.meta_table

# Convert the IntVector column to an int[] column with array()
t1 = t.update("YJArray = array(Y)")
t1m = t1.meta_table

# Convert the int[] column to an IntVector column with vec()
t2 = t1.update("YDHVec = vec(YJArray)")
t2m = t2.meta_table

The vec and array methods can handle the following types:

`vec()`	`array()`
byte[]	ByteVector
char[]	CharVector
double[]	DoubleVector
float[]	FloatVector
int[]	IntVector
long[]	LongVector
short[]	ShortVector

Note

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