maybe a bug in core/fitness.py ?

[yudonglee]

in core/fitness.py

`def range_norm_trafo( arr: chex.Array, min_val: float = -1.0, max_val: float = 1.0 ) -> chex.Array: """Map scores into a min/max range.""" arr = jnp.clip(arr, -1e10, 1e10) normalized_arr = ( 2

• max_val
• (arr - jnp.nanmin(arr)) / (jnp.nanmax(arr) - jnp.nanmin(arr) + 1e-10)
• min_val ) return normalized_arr`

The range_norm_trafo function won't correctly normalize arr value to range of (min_val, max_val)

I think it maybe a bug? It should be modified as below: `normalized_arr = ( (max_val-min_val)

• (arr - jnp.nanmin(arr)) / (jnp.nanmax(arr) - jnp.nanmin(arr) + 1e-10)
• min_val )`

[RobertTLange]

You are completely right -- please excuse the inconvenience. I have just pushed the fix to the main branch in af5c322 -- it will be part of the next release. Please excuse the inconvenience and thank you for pointing this out!