How do I format Xts data time in R?

my data is like this. i have to use this as index for xts in R. "01/04/2013 09:00:01.265381" "01/04/2013 09:00:01.265717" "01/04/2013 09:00:01.266342" "01/04/2013 09:00:01.266342" "01/04/2013...

04 May 2015 850 3 View

Priority queue in R?

Is it possible to implement priority queue in R? how to implement?

03 April 2015 8,745 1 View

What is the queue data structure in R?

I have to implement First In First Out queue in R for my work. Is there any library available or do I have to implement by myself. If I have to implement which data structure would be good...

02 March 2015 1,635 11 View

Octave or matlab?

I have to work on machine learning problems. I would like to know which is better for academic purpose?

01 February 2015 6,669 17 View

Book for machine learning ?

I have enrolled in Machine learning course from coursera. Prof Andrew Ng is really great. I would like to follow book . I am looking for a book which follow the lecture followed by Prof Andrew...

01 February 2015 2,746 3 View

How to find Uptick or downtick from limit order book?

I have to find the Uptick or Downtick from database which contains indian Historical Cash Market data and trade data for a day.

01 February 2015 7,243 1 View

How do I correct my string operations in MySQL?

01 February 2015 3,340 7 View

Research in Data mining?

I would like to publish research article so that I could get phd in good college. I am confused of where to start? could some one give me direction. I have six months and working on DBMS-MySQL.

31 December 2014 9,718 0 View

How do I select records in MySQL?

I have very large table around 15 GB. schema is create table cash_order(Record_Indicator char(2) not null, Segment char(4) not null,Order_number bigint unsigned not null, Transaction_Times bigint...

31 December 2014 8,030 7 View

How to upload large file in MySQL (more than 15 GB)?

I have csv file which minimum size 15 GB. I have to upload the data from file to mysql tables. I created the tables and I used the Load data infile command. It worked well on small size file of...

31 December 2014 9,505 10 View

What is your perception on using visual analysis or quantitative approaches to evaluate data from single-case research designs (n of 1 trials)?

Results of single-case research designs (i.e., n-of-1 trials) are often evaluated by visually inspecting the time-series graph and computing quantitative indices. A question our research team is...

03 March 2021 687 1 View

How to address this issue in the analysis of Real-Time PCR results?

To dear Researchers, I was analyzing a series of concentration for estimation of Real-Time PCR efficiency. The concentration was 1:10. I used MS-excel to evaluate Slope. The result of slope was -8...

01 March 2021 8,683 4 View

How to make a time series imputation benchmark ?

Hello ! In a work, I have to benchmark different algorithms to fill in missing values in time series. I insist on the fact that this is imputation and not forecasting. In my case, I have access...

24 February 2021 7,470 7 View

How to interpolate from a time-series database ?

Hi, I am having trouble with a problem, in the field of Optimal Control and the generation of optimal time-series. Let's consider a system, whose dynamics are represented by dx/dt =...

24 February 2021 9,105 2 View

Can we recognize signs of the "volatility clustering" property of a time series in its time domain plot?

My purpose is to recognize the volatility clustering property without statistical tests such as The Lagrange Multiplier (LM) test.

24 February 2021 4,150 3 View

How can I obtain time series data by country on night-time light (brightness) ?

Hi everyone, Please, how can I obtain time series data by country on night-time light (brightness) ? I've tried, but so far all I can find are maps. I am looking for numerical data, especially in...

24 February 2021 8,625 4 View

I have a time series data of some biochemical studies ( DNA and Chromosomal damage) which I intend to use to further predict into future ?

I have a time series data of some biochemical studies ( DNA and Chromosomal damage) which I intend to use to further predict into future without necessarily conducting the assay for an extended...

23 February 2021 7,842 1 View

How to run repeated measures in mvabund?

I have a dataset of fish species abundances collected from 6 different habitats over the course of 30 years. Fish were collected multiple times per year and environmental variables were recorded...

21 February 2021 3,838 1 View

Can someone help me with this error that I am getting while estimating a VAR model in R?

I am using annual time series data to estimate a VAR model in R. However, when I run the command to find the optimal lag length, I get the following error: Fehler in VARselect(data, lag.max = 10,...

18 February 2021 9,647 3 View

What is recommended and opened real-time or nearly real time geospatial data used in flood risk assessment and regional planning on a detailed scale?

I asked recommended real-time or nearly real-time data source for any parameters for flood risk on a microscale analysis for urban area cases in developing countries that had agglomeration urban...

18 February 2021 2,617 2 View