### Raw EC Notes on Ringo Spectral Problem¶

#### Intro¶

Finshed Haskell code. It's a naked, raw EC. No frills but I have full control of everything.

#### Tried "Hail Mary" on 20 PCA cols and got ..¶

Messy printout but it says ...

• The best MSE was 1084 .. Bad
• The $\alpha's$ go between -8 to + 4 .. Bad
• It took over 3 minutes to run 1000 generations with a population of 300 .. Fair

#### Next Tried only 3 PCA columns¶

No better. The MSE is still 1084

#### Try a Tiny Test Matrix¶

The $\alpha's$ for this are, $[2,3,4]$

Let's run it !

A bit better ...

• MSE is 0.003.
• Took ony 4.3 seconds to run.
• Appears to show that the code is working.
• $\alpha's$ are between approximately 5 and -0.1. ... Bad

So now it appears that we need to reduce the search space by limiting the $\alpha's$ somehow. I'll have to think about this.

##### INotes¶
• Got it all working on Big Iron .. It runs slower! On the good side I changed the program to input random seeds from the command line so I can run 6 different seeds at the same time (one per core) without threading magic. I wrote a script to do this automatically. It hasn't melted the CPU yet.
• Even though I started off each individual with $\alpha's$ between zero and one it moved out of that range (often negative).