Help with Naive Bayes Model for FF

Hi:

I'm trying to build a predictive model in Alteryx for Fantasy Football. Initially, I tried using a linear regression model. But I then realized I needed to take a different approach.

So now I've developed a workflow that feeds 6 weeks worth of fantasy football data to train the model and then provide an unseen version as well.

I ran into an error at first saying that I had too many players. So I added a filter to focus on one player to see how the model works.

But now I'm getting an error on the Score tool saying that the execution was halted because ... predProb.naiveBayes(mod.obj,newdata = new.data).

Anyone familiar with the error and how to resolve? Thanks!

FFBayesianModel 2019Oct21 v1.yxmd

Predictive Analysis

Accepted answers

ivesbr

Hi @ChrisHe:

Quick question about the "other options" section in the configuration panel of the ARIMA tool. It looks like the model is taking the 6 weeks of data from the input file and generating an additional 6 weeks worth of forecasted values.

I assumed that I could configure the number of forecasted periods by adjusting the value under: "number of periods to include in the forecast plot." But that doesn't seem to be the case. Any chance you can confirm how one could go about adjust the number of forecasted outputs? Thanks!

All the best,

All comments

ChrisHe

Hey @ivesbr - could you also pass along the Excel file used in your workflow too? I'll take a look and investigate!

-Chris

LukeG

Hey @ivesbr

After briefly looking at your workflow, I notice two things that may be negatively impacting your model.

1. The metadata shows that all fields are string values. Most of the fields should be numeric.

2. Naive Bayes is a classifier that is meant to predict categorical variables. When predicting fantasy points (numeric), you would be better off with a linear regression, random forest, or any other model that is meant to predict continuous numeric variables.

Let me know if those changes get your model up and running

Luke

ivesbr

Hi @ChrisHe:

Sure thing ... here's the flat file. Thanks!

All the best,

FF Model Data.xlsx

ivesbr

Hi @LukeG:

Thanks for the quick note back. I actually posted a workflow to the Alteryx community last week that was based off a linear regression. But I was advised to try a different model.

So, I tried the Bayesian Model and to your point ... it runs off text (e.g. VString) as opposed to numerical values (e.g. Double). As a result, I flipped all the values to VString so I could run the model.

Not sure if this context helps, but that's the method to my current madness 🙂

All the best,

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