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Questions tagged [som]

A self-organizing map (SOM) is a type of artificial neural network that is trained using unsupervised learning to produce a map reprensenting the input space of the training samples.

A self-organizing map (SOM) is a type of artificial neural network that is trained using unsupervised learning to produce a map representing the input space of the training samples. Also, some supervised and semi-supervised SOMs exist.

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Pointer declaration in .h, instantiation in .cpp but unresolved in other project files

I am trying to declare an array of pointers to my Node class/object in a header file and then in the constructor for the class I want to instantiate the size of the array. I then wish to initialize the array with Node object. The problems that I am…
aaron burns
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How plot U-Matrix, Sample Hit and Input Planes from a trained data by SOM

I have written a simple SOM algorithm in MATLAB. My big challenge is that, how can I visualize/plot data in the format of U-Matrix, Sample Hits and Component/Input Planes? These three plots exists in the SOM toolbox in MATLAB. But the problem is…
BlueBit
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Invoke Method with client.soda ( Statement Object Model )

I am trying to build Esper EPL statements in Java. I use the com.espertech.esper.client.soda lib for this, but I can't find a tutorial to help me. The PatternExpressions are the only part that I need as of now. As an example let's use the EPL: every…
Splitframe
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How to find values of the input data in plotsommaphits

I have used SOM tool box in MATLAB or iris data set. following example and using the plotsomhits i can see that how many data values are in each neuron of my neuron grid of the SOM . However I wish to know actual data values which are grouped in…
Nhqazi
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Save plots as a picture in MATLAB

I'm trying to get some images from neural network function in matlab. One of the functions that I'm using is: plotsomplanes(net) I could not find anyway to automaticlly save the plot in a PNG file. Thanks in advance for any help or idea.
Javid_p84
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Finding least number in a set with CUDA

Suppose you had a function that would take in a vector, a set of vectors, and find which vector in the set of vectors was closest to the original vector. It may be useful if I included some code: int findBMU(float * inputVector, float * weights){ …
user1231745
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SOM example with R explanation

This is a typical example of usage of som function in Kohonen package: library("kohonen") Loading required package: class data("wines") wines.sc <- scale(wines) set.seed(7) wine.som <- som(data = wines.sc, grid = somgrid(5, 4,…
user3351262
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How to process large data files iteratively?

I have a space separated data file with 4.5 million entries in the following format CO_1 A 0 0 0 0 1 CO_2 A 0 0 0 0 1 This data file is used as an input to the Self-Organizing Map (SOM) algorithm that iterates through this…
Synex
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SOM - neural networks

Can anyone tell me if it's possible and how to create neural network from a matrix 60 x 5, which describes 60 cities in 5 different parameters (population, bugdet, area, schools, hospitals). The final results should be presented as following:…
user3237786
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SOM U-Matrix generation

I have been searching online and trying to understand the literature I have, but something is eluding me. Given a SOM, when visualized with a U-Matrix, does the U-Matrix represent the distance between a given node and every other node, or the…
Jack H
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How to send binary image data to self organizing map

I have taken a scanned image with characters, cropped the characters and stored them in a matrix. X={}; Y={}; for cnt = 1:50 rectangle('position',box(:,cnt),'edgecolor','r'); X{cnt}=imcrop(I, box(:,cnt)); Y{cnt}=im2bw(X{cnt}); …
Yash Upadhyay
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Microcontroller, Touchscreen QVGA and a Web Client?

I've been working on a little ATmega for a year now, and have a pretty nice GUI and eventing system. Except, after completing the wireless driver, I'm left wondering, is there another way? I want to know if anyone has come across any device that has…
mriksman
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Matlab som access generated data and parameters

I'm completely new to Matlab and I need some help. I'm running a self-organising map with the Neural Networks toolbox. It all works fine, I use net = selforgmap([x y]); net = train(net,mydata); and then I get access to the nice plots. However I'm…
Marco M
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Related to SOM Tool Box

I need a help related to som tool box. Here is the question. "we have 100 input records(which belongs to two classes) how do we know from SOMToolbox output whether a particular input say number 35 is clustered as class 1 or class 2, can we finalize…
user1350746
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Transform 2d plot into 1d plot

I'm trying to understand self-organising map neural network with Python. Here's a code: import numpy as np from numpy.ma.core import ceil from scipy.spatial import distance from sklearn.preprocessing import MinMaxScaler from sklearn.model_selection…
Silentpig
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