Hi Everyone, I am simply looking for a good tutorial that will walk me through how to create a SOM in R. I am reading Kohonen and Kaski's paper on using the maps to identify the structure of Welfare, and want to try the technique my self. I think many of the examples in R have a lot to be desired. I have looked on the web and didn't ...
I'm looking for a C, C++ or Java based SOM implementation with licensing applicable for commercial use (non-zero cost is okay). So far I'm aware that there exists SOM_PAK (from Kohonen), but the licensing forbids commercial use. Is anyone aware of alternative implementations? ...
I'm trying to cluster some images depending on the angles between body parts. The features extracted from each image are: angle1 : torso - torso angle2 : torso - upper left arm .. angle10: torso - lower right foot Therefore the input data is a matrix of size 1057x10, where 1057 stands for the number of images, and 10 stands for angle...
I like to stop the execution when Batch SOM becomes converged. What error function can I use to determine the convergence? ...
Hi Experts, I am working on Self Organizing Map (SOM) Implementation and i have a microarray dataset which i am trying to read in using some_read_data function, but i keep having an errors when i edit it to have it in SOM_PAK form which is recognise by SOM for reading such as ??? Error using ==> somtoolbox\som_read_data.m Only 69 vector...
According to "Introduction to Neural Networks with Java By Jeff Heaton", the input to the Kohonen neural network must be the values between -1 and 1. It is possible to normalize inputs where the range is known beforehand: For instance RGB (125, 125, 125) where the range is know as values between 0 and 255: 1. Divide by 255: (125/255) =...
I'm trying to pass a txt file to som_read_data from a GUI......i created a function that takes a txt file from the GUI and then passes it to som_read_data..but i'm getting some errors...here are a list of some of the errors.....any one with ideas? ??? Error using ==> ftell Invalid file identifier. Use fopen to generate a valid file ide...
I'm designing a GUI to implement SOM algorithm in MATLAB, but i'd want the user to be able to input the "No of iterations", "Initial and Final Neighborhood size" and "Initial and Final Learning Rates"....i'm using the SOM toolbox, how do i use these inputs gotten from the user to achieve my goal......any help please...rmbr files from the...
I would like to know how I can use SOM for disease detection. Given a lung cancer dataset, how can SOM be applied for detection, there are certain terminologies like, sensitivity, specificity and accuracy percentages....are there ways to calculate all these with the SOM algorithm? I would appreciate answers from anyone who can shed more ...
Hello, I just implemented a SOM algorithm in MATLAB that outputs component planes and U matrix....but i want to be able to calculate sensitivity, accuracy and specificity....how do i go about doing this in MATLAB??....any ideas or useful links would be highly appreciated?? ...
I have an input data in Excel which has 2000 rows and 60 columns. I want to read this data into MATLAB but I need to to interchange the rows and the column so that the matrix will be 60 rows and 2000 columns. How can I do this in MATLAB, because Excel only has 256 column which cannot hold 2000 columns. ...
I have the SOM toolbox with the original implmentation of a Kohonen network. I am looking for a fuzzy kohonen network implmentation. Does anyone have it or know where I can get it? ...