Questions tagged [c#]
C-sharp is a general-purpose object-oriented programming language created & managed by Microsoft.
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What does it mean to have a "transient state" or a "transient phase" in an Ising model?
I downloaded a simple implementation of the Ising model in C# from this link.
I have understood more or less the entire code except the following routine:
...
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326
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Confirm bug in t-test calculation
Question
Suspected a bug in a T-Test c# code and ask if somebody could confirm.
Sidenote
My question might be a candidate to be closed, as "Bugs in the software (report them to the makers of that ...
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2
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469
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ML-Agent "std of reward: 0.000." Agent stops learning
I've been trying to train my self-balancing agent to learn to keep his waist above a certain position. But after a while, he just repeatedly keeps trying the same approach/tactic over and over again. ...
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1
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352
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How can i normalize the input data to neural network [duplicate]
I've got a question. I thought about it so much, but cant get an idea how can I do that.
I want to create neural network in Encog framework. The neural network is about shopping. I have a database ...
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Why doesn't my Feed-forward NN work when I try to train it with multiple inputs? [duplicate]
Basically I am trying to create a Neural Network in c# from scratch, without using any libraries.
The issue that I am facing with right now is whenever I try to train my network with different inputs ...
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1
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159
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How can we calculate mean? [closed]
In the AForge.net the mean value of a vector is calculated as follows:
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Similiarity between temperature vectors [closed]
Please help in the following problem: I have a set of data consisting of daily temperatures, gathered every hour, togheter with daily energy consumption. Given the temperature forecast on the next day,...
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504
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SVD based recommender system C#
I'm trying to reduce the number of dimensions in my dataset for a movie recommender system using SVD. I'm using the 'MovieLens 1M Dataset' from GroupLens.org. I've used the MathNet library for ...
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354
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How to determine states for Hidden Markov Model
I am trying to learn about machine learning using Accord.Net.
I created a project that has a number of labeled states that represent screens a user visited in a sequence. I created some unit tests to ...
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1
answer
2k
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Interpreting the entropy of a Dirichlet distribution
I was looking for a measure to interpret the "spikiness" of categorical histograms. So, if it becomes unnaturally skewed towards a certain value at a given time, I want a metric that will show some ...
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2
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1
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686
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Neural network vectorization, no convergence
2I am trying to implement a fully vectorized neural net following this example Stanford. I am using C# with Math.net numerical library of which the binaries can be downloaded here NuGet. Because the ...
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94
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How to calculate ideal amount of reps needed for good average in R
Basically, I have some samples I'm processing to get moisture results on and I want to get a good average on the readings based on the ideal amount of repetitions. Duplicates is not enough and 10 ...
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351
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Calculate value needed to reach target by the end of a year [closed]
I have a set of values (scores to a particular KPI), these are reported monthly. I need to calculate what I'd have to score every month from now until the end of the year to reach that target.
I'm ...
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1
answer
7k
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Time-series forecasting (in C#)
I'm developing an app in C# (WPF) that amongst other things, it makes a time-series based forecast of sales (4-5 months into the future). I'm an industrial engineer so I'm not pro in statistics nor in ...
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850
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How do I ensure my implementation of a MLP from Weka is correct?
I have been training MLPs for a binary classification problem in the Weka explorer and now have one with an acceptable level of accuracy. I've written some code to parse the text of the model which ...
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155
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Validating logistic regression - formulas needed for simulation
This is related to a data classification problem having a Boolean output variable.
Summary: Once I perform the ML task using Logistic regression, I get the required coefficients. I use the ...
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1
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1k
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Visualizing large file-based or Redis-in-memory stored large datasets (millions of data points)
I am very active at StackExchange's QuantFinance forum but thought this question is more suitable to be asked here.
I am generating large time series data and store them in-memory in Redis (...
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1
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397
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When should I update a recommendation engine?
[I asked this on StackOverflow and was told it would be a better fit here]
I am including a basic recommendation engine in a very small project for my final exam. I understand the code and the math ...
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1
answer
3k
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Using multinomial regression's coefficients to derive predicted outcomes in C#
I am attempting to use C# (and the alglib library) to calculate the predicted probability that an outcome ends up in one of five classes. I have managed to calculate parameter estimates (i.e. slope ...
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3
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314
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Comparing odds and payouts of different lotteries
I'm not a statistician, but I'm interested in how far I can push myself with my basic algebra skills, armed with a C# development background and Excel.
Suppose I have several lotteries, each with ...
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1
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2k
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Dividing and forecasting a normal distribution
I have a collection of real-world samples that I am trying to model and then forecast.
There are 10 datasets – each has an increasing number of data points (from 1 to 10). The points are equi-...
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Math Statistics Bell Curve Computing % correct given 2 numbers (C#) [duplicate]
Possible Duplicate:
Computing per cent correctness from a bell curve
I've been trying to remember my High School teachings and are falling short.
I'm working on a project where I need to give a %...
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