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 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

Python stepwise regression with AIC?

Hi, what is the Python equivalent for R step() function of stepwise regression with AIC as criteria? Is there an existing function in statsmodels.api?

02 March 2018 349 1 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

Can linear DNA be used as template for site-directed mutagenesis?

Is it possible to induce site-directed substitution mutation by quick-change method on linear dsDNA? or it has to be cloned in some vector? If yes, should it be treated with the Dpn1 enzyme...

03 March 2021 401 4 View

PUC19 as a transfer plasmid for lentiviral delivery?

Hello, Is it possible to use pUC19 as a transfer vector to be packed in using the second generation viral particles packaging system( pMD2.G; psPAX2 plasmids)? As far as I understand it there is...

28 February 2021 4,868 2 View

How to get the vector of a specific vibration mode in phonon dispersion?

For example, I have this phonon dispersion(Fig. 1), and now I would like get vector of atoms which describes TA1 in P. I know v_sim can show vibrational animation of specific mode, but I do not...

20 February 2021 4,332 4 View

Specify the Burgers vectors for dislocations, which cannot be uniquely identified.?

1. A bcc metal single crystal was sliced along (1 -1 0) plane for TEM study. Assuming that the TEM available is equipped with a goniometer stage which tilts up to 45o. The Burgers vector of...

20 February 2021 2,370 1 View

I am working on image transmission, i converted the image into binary vector, i want to extract the MSB of each pixel ?

i have a vector 1*512 size, i want to take the first value every 8 elements and put these elements at the end of the vector,how to do this on matlab ?

19 February 2021 2,352 5 View

Does the property of GFP affect a fusion protein's localization?

Hello, I am planning to insert GOI between CaMV 35 promoter and mGFP in pCambia1302 to produce a fusion protein and see subcellular localization of the protein. But the vector says it's membrane...

15 February 2021 4,353 3 View

How much amount of DNA (ligation mix) should I use for transformation?

Hi Fellow Scientists! I am trying to clone my 300 bp insert into a 6 kb vector. I run a few different ligation reactions using (1:3 vector: insert molar ratios) 10, 20,30, and 40 ng/ul vector...

15 February 2021 9,563 6 View

Can I express protein of plant origin in E. coli strain (M15) using pET28a vector systems? Are M15 strains and pET vector systems compatible?

Are E.coli strains M15 and pET28a vector systems compatible? Can I over-express my protein which is of plant origin. Previously I was using BL21 DE3 strains. Was confused to use M15 strains for...

10 February 2021 2,564 3 View

Plasmid amplification in S2 cell?

When co-transfect S2 cell with selection vector (pCoHygro or pCoBlast ) to make a stable cell line, does the gene integrate into the genome or just like E.coli? How do the plasmids amplify within...

09 February 2021 5,423 1 View

No title

When I research the ransomware detection with adversarial examples, I extracted the dataset from the strings based on cuckoo dynamic analysis. Those datasets are based on the count of each string....

08 February 2021 7,049 3 View