Gym-MiniGrid/docs/environments/memory_s7.md

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title: Memory S7

Memory S7

Description

This environment is a memory test. The agent starts in a small room where it sees an object. It then has to go through a narrow hallway which ends in a split. At each end of the split there is an object, one of which is the same as the object in the starting room. The agent has to remember the initial object, and go to the matching object at split.

Mission Space

"go to the matching object at the end of the hallway"

Action Space

Num	Name	Action
0	left	Turn left
1	right	Turn right
2	forward	Move forward
3	pickup	Pick up an object
4	drop	Unused
5	toggle	Toggle/activate an object
6	done	Unused

Observation Encoding

• Each tile is encoded as a 3 dimensional tuple: (OBJECT_IDX, COLOR_IDX, STATE)
• OBJECT_TO_IDX and COLOR_TO_IDX mapping can be found in minigrid/minigrid.py
• STATE refers to the door state with 0=open, 1=closed and 2=locked

Rewards

A reward of '1' is given for success, and '0' for failure.

Termination

The episode ends if any one of the following conditions is met:

1. The agent reaches the correct matching object.
2. The agent reaches the wrong matching object.
3. Timeout (see max_steps).

Registered Configurations

S: size of map SxS.

• MiniGrid-MemoryS17Random-v0
• MiniGrid-MemoryS13Random-v0
• MiniGrid-MemoryS13-v0
• MiniGrid-MemoryS11-v0