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Questions - forecast

Unable to append forecast results into a vector or dataframe

I have a dataframe with each column representing data for a year (from 2000 to 2018). I am using simple forecast() function to predict the result for 2019. The issue is while using for loop to generat...
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user17962048

r

dataframe

forecast

Votes: 0

Answers: 1

Latest Answer

It just seems to be an issue with how you're assigning the results. Your current code is overwriting the result at the end of each loop. Try this: Data = data.frame("2017" = c(20,30,45,66,12...
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rw2

Forecast model taking in consideration estimated external factors

I am trying to predict the sales of 4 products from different brands. I tried using ARIMA model and SARIMA but I am wondering if it is possible (and how) to include external factors say for instance t...
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Avad

r

time-series

prediction

arima

forecast

Votes: 0

Answers: 1

Latest Answer

Consider using the Forecasting Practices and Principles package from Rob Hyndman. The book can be purchased on Amazon, or viewed for free from the author. I very highly recommend this book. He has an ...
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Russ Conte

Does it exist a LSTM model that can have exogenous factors same as SARIMAX?

I have been working with SARIMAX a while now. I try to predict energy usage in large buildings. Im using weather data as exogenous variables. As I know the predicted weather from the weather forecast ...
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Peder Ward

machine-learning

lstm

recurrent-neural-network

forecast

sarimax

Votes: 0

Answers: 1

Latest Answer

You can handover as many variables/features to LSTM as you want. In the first layer you specify the input_shape(length, width), this defines how the first layer expects input. For example, if you have...
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Arne Decker

why does forecast function from package fabletools (R) back transform log(.) but not box_cox(., lambda)

It was my impression that the forecast function from the R package fabletools automatically back transformed forecasts: "If the response variable has been transformed in the model formula, the tr...
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Richard Martin

r

forecast

tsibble

fabletools

Votes: 0

Answers: 1

Latest Answer

Found the solution here: https://github.com/tidyverts/fabletools/issues/103 Hope this helps someone else. The crux of the issue is that you need to supply the value of lambda for the forecast period...
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Richard Martin

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