Senior PM @LumenTechCo. Exploring data and deep learning
Atlanta, GA
Joined February 2016
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This week, I rebuilt my housing-price model from scratch and explored how collaborative filtering predicts outcomes beyond movie ratings.
nickbuildsai.substack.com/p/…
This week, I tested whether equal-weight ensembles of my random forest, linear model, & neural network could beat my best housing-price model; none did. Next, I’m rebuilding the workflow from memory before moving on to collaborative filtering.
nickbuildsai.substack.com/p/…
This week, I trained a random forest with 25% lower error than my linear housing-price model on the same validation set. Then I used maps and feature importance to explore what it had learned about location and transit access.
Link: nickbuildsai.substack.com/p/…
This week, I built and tested linear-model and neural-network ensembles to predict real-estate prices. Both had lower validation error than their members’ average, but neither beat its best individual model.
nickbuildsai.substack.com/p/…
This week, I built a linear model and neural network to predict real-estate prices on an unfamiliar dataset. Along the way, I fixed mismatched error metrics and inconsistent feature scaling, and learned to rebuild/explain the workflow on my own
nickbuildsai.substack.com/p/…
After six hours of waiting for my NLP classifier to train, it never finished; I cut the sample size way down, ran it again, and finished in a few minutes. In the future, I'll start with a smaller sample size and add more samples as needed.
nickbuildsai.substack.com/p/…
This week, I trained a movie-review classifier to 94% training accuracy this week, using a sample of reviews from IMDB. Turns out, I was using a pretrained model without knowing it
nickbuildsai.substack.com/p/…
I rebuilt the training process for my MNIST classifier from scratch and caught a bug: the optimizer was using the wrong model’s parameters. After several weeks on fastai’s Lesson 3, I understand how the pieces fit together and am ready to move on to NLP.
nickbuildsai.substack.com/p/…
I finished first working versions of both fastai Chapter 4 assignments. I still need the code open beside me.
nickbuildsai.substack.com/p/…
I could understand the training loop while reading chapter 4, but I could not reconstruct it from a blank notebook. The course teaches it bottom-up; I naturally build software top-down.
nickbuildsai.substack.com/p/…
This week, I rebuilt gradient descent in PyTorch from memory, then tested five ResNet models on my zoysia disease classifier. ResNet-101 reached 91% validation accuracy.
nickbuildsai.substack.com/p/…
This week, I built a regression model in Excel, then extended it into a small neural network by combining two ReLUs.
nickbuildsai.substack.com/p/…
🤖 Made with AI
After failing to learn deep learning three times, I’ve finally found the right approach.
NickBuildsAI.substack.com/p/…
Nick Swekosky retweeted
What’s life like outside of the megaregions
I feel like I’ve lived a lot of places but turns out never outside of a megaregion
Nick Swekosky retweeted
BREAKING: Nvidia and PulteGroup are partnering with startup Span to install mini data centers on the walls of new homes
Each unit packs 16 Nvidia Blackwell GPUs, 4 AMD EPYC CPUs, and 3TB of RAM - and taps unused home electrical capacity to run AI inference workloads
Nick Swekosky retweeted
Also don’t remember. But it’s been living rent free in my head ever since. Puts a very important truth that you intuit when building companies in a very accessible form.
