# Adding array of numbers **URL:** \ **Category:** Ruby\ **Created:** [October 3, 2007, 5:39pm UTC](https://www.ruby-forum.com/t/adding-array-of-numbers/116231 "2007-10-03T17:39:05Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![dacbo](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/b9e5f3/32.png) [@dacbo](https://www.ruby-forum.com/u/dacbo)\ **Post date:** [October 3, 2007, 5:39pm UTC](https://www.ruby-forum.com/t/adding-array-of-numbers/116231/1 "2007-10-03T17:39:05Z")
Given a file that looks like so: 7 ==\> training Set length 11 ==\> file length 1 0 0 0 0 1 0 0 0 1 1 1 0 0 1 0 1 0 1 0 1 0 1 1 1 0 1 1 1 1 1 1 0 0 1 0 1 1 1 1 1 1 0 1 0 1 1 0 0 0 0 1 0 1 0 1 1 1 0 0 1 0 0 1 1 1 0 0 0 0 0 0 0 1 0 1 0 1 1 0 1 1 1 1 1 0 0 0 ==\>end of file #training set #Answer For now, I need to do this : get the dotProduct of the vector training set and weight vector, and if that number is \> 0 , output 1 ,else output 0. later in the problem I compare that to the answer, but I’m not there yet. Here is what I have(with tests) to try to get 1 training set to add up all numbers(without the dotProduct of weights) using IO.readlines, splitting each line using split, for loops to get an array of integers to be added together to get output for Perceptron\_Bond object named einstein. coding is as follows class Perceptron\_Bond attr\_reader :weights, :output attr\_writer :weights, :output def initialize(input, weights) @weights = weights @input =input end def output y = @input.inject(0) {|sum, element | sum+element} @output=y end end str = ARGV[0] inputs = Array.new inputs1 = Array.new inputsNum = Array.new setArr = Array.new answers = Array.new arr = IO.readlines(str) arr.shift arr.shift arr.each { |y| inputs1.push(y.split)} inputs1.each do|x| answers.push(x.last) x.pop end for i in 0…inputs1.length setArr[i]= Array.new for j in 0…inputs1[i].length inputsNum[j] = Array.new inputsNum[j].push(Integer(inputs1[i][j])) if j==(inputs1[i].length-1) then inputs[i] = inputsNum end end puts inputs[i].to\_s end puts inputs.to\_s puts inputs[2][1].class ==\> Array #i want fixnum initWeights = Array.new(inputs.length) { |index| index =0 } einstein = Perceptron\_Bond.new(inputs[0] , initWeights) puts einstein.output #should produce fixnum 2 i get an error as well in output telling me I cannot coerce an Array to a fixnum Im guessing its stemming from the nested for loops I have, but I am just stumped I need help in a bad way, please. ---
**Author:** ![dacbo](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/b9e5f3/32.png) [@dacbo](https://www.ruby-forum.com/u/dacbo)\ **Post date:** [October 3, 2007, 6:14pm UTC](https://www.ruby-forum.com/t/adding-array-of-numbers/116231/2 "2007-10-03T18:14:31Z")
-------- Original-Nachricht -------- > Datum: Thu, 4 Oct 2007 00:39:09 +0900 > Von: Chris B. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) > An: removed\_email\_address@domain.invalid > Betreff: adding array of numbers > 1 1 0 0 1 0 0 1 > to be added together to get output for Perceptron\_Bond object named > > answers = Array.new > end > > stumped > I need help in a bad way, please. > > Attachments: > [http://www.ruby-forum.com/attachment/524/somefile.rb](http://www.ruby-forum.com/attachment/524/somefile.rb) > > – > Posted via [http://www.ruby-forum.com/](http://www.ruby-forum.com/). Dear Chris, if I understand you correctly, a first problem is that you need to get the scalar product of two vectors. I’d like to suggest that you use GSL [http://www.gnu.org/software/gsl/](http://www.gnu.org/software/gsl/) and its Ruby bindings ruby-gsl [http://rb-gsl.rubyforge.org/](http://rb-gsl.rubyforge.org/) to do these manipulations - they have them implemented in C code, so the actual computations are faster than in Ruby, besides the fact that you don’t have to recode everything by yourself. I have written some code below to extract a matrix and the answer vector from a file, and to calculate the dot product. I think you can go on from there … or just ask again 🙂 Best regards, Axel * * * require “gsl” =begin I assume that the file “dat.txt” contains 1 0 0 0 0 1 0 0 0 1 1 1 0 0 1 0 1 0 1 0 1 0 1 1 1 0 1 1 1 1 1 1 0 0 1 0 1 1 1 1 1 1 0 1 0 1 1 0 0 0 0 1 0 1 0 1 1 1 0 0 1 0 0 1 1 1 0 0 0 0 0 0 0 1 0 1 0 1 1 0 1 1 1 1 1 0 0 0 =end text=IO.readlines(“dat.txt”) matrix\_lines=[] answer\_vec=[] text.each{|entry| s=entry.split(/ +/) matrix\_lines\<\ **Author:** ![dacbo](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/b9e5f3/32.png) [@dacbo](https://www.ruby-forum.com/u/dacbo)\ **Post date:** [October 4, 2007, 3:13pm UTC](https://www.ruby-forum.com/t/adding-array-of-numbers/116231/3 "2007-10-04T15:13:52Z") 2007/10/3, Chris B. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid): > 1 1 0 0 1 0 0 1 > to be added together to get output for Perceptron\_Bond object named > > answers = Array.new > end > > stumped > I need help in a bad way, please. > > Attachments: > [http://www.ruby-forum.com/attachment/524/somefile.rb](http://www.ruby-forum.com/attachment/524/somefile.rb) I am not sure whether I understood properly which of the vectors you want to multiply with which ones. Is this what you want? Kind regards robert ---
**Author:** ![dacbo](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/b9e5f3/32.png) [@dacbo](https://www.ruby-forum.com/u/dacbo)\ **Post date:** [October 4, 2007, 10:46pm UTC](https://www.ruby-forum.com/t/adding-array-of-numbers/116231/4 "2007-10-04T22:46:40Z")
On Oct 3, 2007, at 9:39 AM, Chris B. wrote: > 1 1 0 0 1 0 0 1 > 1 1 0 0 0 0 0 0 > 0 1 0 1 0 1 1 0 > 1 1 1 1 1 0 0 0 ==\>end of file > #training set #Answer not answering your question, but you _really_ want to be using NArray [http://narray.rubyforge.org/](http://narray.rubyforge.org/) kind regards. a @ [http://drawohara.com/](http://drawohara.com/) ---
**Author:** ![dacbo](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/b9e5f3/32.png) [@dacbo](https://www.ruby-forum.com/u/dacbo)\ **Post date:** [October 4, 2007, 7:58pm UTC](https://www.ruby-forum.com/t/adding-array-of-numbers/116231/5 "2007-10-04T19:58:04Z")
Robert K. wrote: > 2007/10/3, Chris B. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid): > > > 1 1 0 0 1 0 0 1 > > to be added together to get output for Perceptron\_Bond object named > > > > answers = Array.new > > end > > > > stumped > > I need help in a bad way, please. > > > > Attachments: > > [http://www.ruby-forum.com/attachment/524/somefile.rb](http://www.ruby-forum.com/attachment/524/somefile.rb) > > I am not sure whether I understood properly which of the vectors you > want to multiply with which ones. Is this what you want? > > Kind regards > > robert The problem was to make a perceptron learning algorithm. you take the 1 1 0 0 1 0 0 string then initially multiply it by the weight vector of all 0s. The output is the dot product of the two vectors. Then you compare that output to the answers that are on the right. If the perceptron did not fire(0), when it should have, you add the dot product to the old weight vector, and the converse(1 when it should be 0) you subtract here is the speudocode w= random vector repeat Get input x Get neuron output y = (1 if w ⋅ x ≥ 0; otherwise 0) Find correct output y# Compute error e= y# − y If e ≠0 w= w + ex until w stops changing hope that helps ---
**Author:** ![dacbo](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/b9e5f3/32.png) [@dacbo](https://www.ruby-forum.com/u/dacbo)\ **Post date:** [October 12, 2007, 9:30pm UTC](https://www.ruby-forum.com/t/adding-array-of-numbers/116231/6 "2007-10-12T21:30:04Z")
ok, so I got the thing to work, with just arrays, but now i want to ask the user if he/she wants to go through the set again, with ‘yes’ and ‘no’ as the values, and what I end up with is an infinite loop. while gets != ‘no’ einstein.input.each\_index { |x| einstein.c\_weights(einstein.input[x], einstein.weights, matrix\_ans[x][0]) } end I was wandering if having the ARGV[0] as the filename has anything to do with it.