How to set up LSTM for Time Series Forecasting?

Hi All, My question is about modeling time series using LSTM (Long-Short-Term-Memory). I have 18 response variables for which all of them are monthly time series for about 15 years, and I would...

06 July 2018 6,753 1 View

How to add predictors to LSTM time series model?

Hi All, I'm doing Long-Short-Term-Memory (LSTM) to forecast time series. I was wondering, could we add x-reg part to an LSTM model? Like adding an X-Reg part to and ARIMA model? Say I have a...

06 July 2018 4,847 0 View

R String, return a boolean vector of if or not the character is alphabetic?

Hi All, I was wondering if there is a way I can do something like this: str = "3 .*MTNs2 AB33" This is a string of 14 characters I would like to have R return a vector of length 14, and true...

05 June 2018 6,153 1 View

R fitting arima, Error in optim, non-finite value supplied by optim?

Hi All, I'm fitting an arima with xreg: arima(temp_ts, order = c(1,1,1), seasonal = list(order = c(0,1,0), period = 12), xreg = temp_xreg, method="CSS") and it reported error: Error in...

03 April 2018 6,757 2 View

R Factor Analysis with huge amount of predictors resulting in system is computationally singular?

Hi All, I was trying to run Factor analysis for a dataset with around 150 variables but only have around 80 observations. I tried the "factanal" function in R and R reported error: Error in...

02 March 2018 3,962 3 View

PySpark Error on Jupyter Notebook (Py4JJavaError)?

This is a question regarding PySpark Error on Jupyter Notebook (Py4JJavaError) I'm running the demo code from https://spark.apache.org/docs/2.2.0/mllib-linear-methods.html regarding Linear least...

01 February 2018 8,007 0 View

R Logistic Regression Coef sensitive to epsilon = 1e-8. Coefficient not converge?

I'm running a logistic regression with about 200k observations, in which there is one binary predictor where out of the 200k observations there is only 4 occurrence of "1". And the coefficient I...

10 November 2017 2,758 2 View

Logistic Regression detecting over-dispersion and the impact?

Hi All, I'm fitting a logistic regression and I summed up the deviance and used a chi-square distribution to test over-dispersion with this code below: 2 Questions: Q1: I'm getting a p-value

10 November 2017 5,127 2 View

How to test "constant" over time?

How to test a Time Series to be "Constant" over time? I can think of: 1. No Trend (use linear regression and kernel regression) 2. No Seasonality (? Spectrum analysis with T = 2*pi /...

01 February 2017 2,199 7 View

What is the Fastest Neural Network Command in R?

05 June 2016 5,752 3 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence?

I am on the lookout for the Enhanced Yellow Fluorescent Protein (Aequorea victoria) DNA sequence. Does anyone know where I can find it? Thank you in advance

03 March 2021 3,568 1 View

What kind of fluid could I use for a pitfall trap that also does not invalidate molecular testing?

Hi, I want to start testing pitfall trap to obtain ants samples, but I need to conduct molecular analysis on those insects. So, what kind of fluid can I use? Ethanol expires too early and I need...

03 March 2021 5,978 5 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Irradiation data for JAPAN?

Hi, Could you help me to get the latest (2019, 2020) solar resource data for a particular site in JAPAN? PV GIS and NSRDB data are not in reach to JAPAN, I'm looking for some other database for...

03 March 2021 961 3 View

Logistical regression using SPSS for a dichotomous dependent variable, with an independent variable of 1, 2, 5 and 10 seconds?

I have an experiment with 28 participants The independent variable is the times 1, 2, 5, and 10 used as the cross hairs during a task These 4 times were tested using 4 different blocks, each...

03 March 2021 9,692 2 View

Do we need to write protocol for a second study of a systematic review that has been registered and published?

I have conducted and published a systematic review and meta-analysis research with the topic related to public health and health pomotion (protocol was registed in PROSPERO). Now we want to...

03 March 2021 8,920 3 View

How to increase a model accuracy ?

dear community, my model is based feature extraction from non stationary signals using discrete Wavelet Transform and then using statistical features then machine learning classifiers in order to...

03 March 2021 6,994 5 View

Do I need to do linear regression before running mediation analysis using PROCESS MACRO by Hayes ?

I just wanted to check if I need to run a linear regression separately if I am using PROCESS MACRO to run mediation analysis. Thank you.

02 March 2021 4,359 3 View

How to normalise data on OPM package from R Studio ?

Good afternoon, I recently used OmniLog from BIOLOG for my experimentations : I tested the metabolism of different strains on 2 types of plates. I have 16 strains of 3 different groups...

02 March 2021 3,584 1 View