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We think therefore we RNarrating mathematics with R
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Narrating mathematics with R
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We think therefore we R: Principal component analysis : Use extended to Financial economics : Part 1
http://programming-r-pro-bro.blogspot.com/2011/10/principal-component-analysis-use.html
We think therefore we R. Narrating mathematics with R. Sunday, 16 October 2011. Principal component analysis : Use extended to Financial economics : Part 1. While working for my Financial economics project I came across this elegant tool called Principal component analysis (PCA)which is an extremely powerful tool when it comes to reducing the dimentionality of a data set comprising of highly correlated variables. This tool finds majority application in genetic research. That the above simplification can ...
We think therefore we R: Modelling with R: part 3
http://programming-r-pro-bro.blogspot.com/2011/10/modelling-with-r-part-3.html
We think therefore we R. Narrating mathematics with R. Wednesday, 5 October 2011. Modelling with R: part 3. The previous posts, part 1. Detailed the procedure to successfully import the data and transform the data so that we can extract some useful information from them. Now it's time to get our hands dirty with some predictive modelling. 21: Logistic regression- - - - - - # # # # # # # #. Family = binomial(link = "logit"), data = dev). The glm command is for "Generalized Linear Models". The above code i...
We think therefore we R: June 2012
http://programming-r-pro-bro.blogspot.com/2012_06_01_archive.html
We think therefore we R. Narrating mathematics with R. Friday, 1 June 2012. Term structure of interest rate spread volatility : Unit root test. Recently, I was working on my master's thesis and came across an interesting observation regarding the term structure of interest rate spread volatility that I wish to share. Let me first try and throw some light on the jargon that I have used. To begin with, term structure of interest rates. Well, the trading of bonds. Daily term structure rates. When we visuali...
We think therefore we R: March 2013
http://programming-r-pro-bro.blogspot.com/2013_03_01_archive.html
We think therefore we R. Narrating mathematics with R. Tuesday, 19 March 2013. Dealing with different object types in a vector in R. I came across a little problem while dealing with a vector in R which had one of the most simple solutions. These are, in my opinion, the most annoying problems with the most simple and commonsensical solution. Anyways, yet again Utkarsh. How to deal with different object types in one vector. Testdata - data.frame(id = c(1:5), x = c(1,2,3,NA,"Shre"). Id x "integer" "factor".
We think therefore we R: December 2012
http://programming-r-pro-bro.blogspot.com/2012_12_01_archive.html
We think therefore we R. Narrating mathematics with R. Tuesday, 4 December 2012. R FAQs for the fresh starters. Keeping that in mind, I thought it would be nice to have a repository of Frequently Asked Questions. I can then directly refer the inquirers to the webpage. Below are the queries that I have been asked most often, not necessarily in order of number of queries though. We will use the classic iris data set to illustrate the code with examples. 1 51 3.5 1.4 0.2 setosa. To get brief info, do. The b...
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Using neural network for regression | Heuristic Andrew
https://heuristically.wordpress.com/2011/11/17/using-neural-network-for-regression
Good-enough solutions for an imperfect world. Using neural network for regression. November 17, 2011. Indeed, and the first example of neural networks in the book “Data Mining Techniques: Second Edition” by Berry and Linoff is estimating the value of a house. Now, let’s use the function train() from the package caret to optimize the neural network hyperparameters decay and size, Also, caret performs resampling to give a better estimate of the error. In this case we scale linear regression by th...Train n...
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Thoughts on Programming
Friday, March 7, 2014. The Obligatory Sudoku Example. No discussion about constraint solvers is complete without the obligatory sudoku example. Unfortunately, sudoku is such a basic exercise for a constraint solver that it doesn’t really tell you much about the engine. But if anything, because sudoku is so standard, it has become a good way to get a feel for the. Of the constraint DSL. To follow the example, the main thing you need to know about Loco is that the notion of a subscripted variable, like.
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Software Development resources including software and IT jobs, training and online courses. Interview questions in Software programming, QA, testing and project management. Programming Tips, QTP Tips. Wipro Freshers jobs for Engineering and Science Graduates. Here is the information as taken from the Wipro website regarding the job openings for freshers from Engineering and Science graduates. See here for more details:. Freshers jobs for Engineering Graduates. Freshers jobs for Science Graduates. Accentu...
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We think therefore we R
We think therefore we R. Narrating mathematics with R. Wednesday, 8 April 2015. The curious case of ARIMA modelling using R. I recently made an interesting observation that I thought is worth sharing. During a data expedition process while trying to fit an ARIMA (auto-regressive moving average) model in order to check for seasonality, I observed something strange while fitting an ARMA model using the function arma{tseries}. Above information is cited directly from the package documentation in R. Given th...
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programming-review « WordPress and other programming
PR – Home. Find and grep commands for searching. Examples: Find files named core in or below the current directory find . -name core Find files starting with core […]. December 22nd, 2011. PHP enable more room for file upload. The first things to check is PHP.ini file. The values of upload max filesize, memory limit and post max size in the php.ini configuration file […]. June 1st, 2015. Detect all links from all your posts. May 26th, 2015. Object is not a function message. February 24th, 2015. Here is t...
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