Getting multiple variables from the output of docker exec command in a bash script?

I would like to execute a script on a host machine (script_on_host.sh), which then reaches inside a docker container in order to grab some data using a second script (script_in_container.sh). The data is only available inside the container, and not from the host directly, hence the reason for doing it this way. I am having trouble passing data between the two scripts. I tried the following: **script_in_container.sh**

#!/bin/bash

x=1
y=2
z=6.3
echo $x
echo $y
echo $z

**script_on_host.sh**

#!/bin/bash

results=$(docker exec mycontainer './script_in_container.sh')
X=$results(1)
Y=$results(2)
Z=$results(3)

But it throws an error. Can someone help me with this? Is there a nice or more standard way to go about passing variables in this way? I feel like I'm maybe doing something a little clumsily here, by using echo to print multiple lines from the container script.