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

Python time conversition?

03 April 2015 531 0 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 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

Physics: Why do we describe light by referring to its wavelength, but microwaves and radar pulses by referring to their frequency?

In physics, the description of the properties of light generally refers to its wavelength (nm), while in the range of microwaves and radio waves we refer to the frequency of a signal (e.g. kHz or...

03 March 2021 1,682 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

What is the most Operating System (OS) which can be INSTALL on Tiny hard devices like Raspberry Pi (RPi) hardware ?

I'm targeting to deploy a mesh network and manually configure MANET routing protocols. I'm preparing scenarios, architectures, and hard devices needed to do that. Are there some step-by-step...

03 March 2021 1,931 5 View

Could you recommend any books about Number Theory?

Beginner level books. High level books. Analytical Number Theory. Algebraic Number Theory. Combinatorical Number Theory. Books about partitions. Books about primes.

03 March 2021 7,174 5 View

Looking for Materials with high thermal expansion coefficient and high temperature resistance?

03 March 2021 8,272 1 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View

What kind of intervention will be relevant to increase motivation among young sport trainees?

Any suggestion on what book to read is also welcome.

03 March 2021 1,646 4 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

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