单层神经网络中的matlab语法错误 [英] matlab syntax errors in single layer neural network

问题描述

我必须实现一个单层神经网络或感知器，为此，我有2个文件数据集，一个用于输入，一个用于输出，我必须在matlab中执行此操作而不使用神经工具箱.下面给出2个文件.

I have to implement a single layer neural network or perceptron.For this, I have 2 files data sets , one for the input and one for the output.I have to do this in matlab without using neural toolbox.The format of 2 files is given below.

 In:
    0.832 64.643
    0.818 78.843
    1.776 45.049
    0.597 88.302
    1.412 63.458


Out:
0 0 1
0 0 1
0 1 0
0 0 1
0 0 1

目标输出是对于相应输入所属的特定类别为1，对于其余2个输出为" 0.

The target output is "1 for a particular class that the corresponding input belongs to and "0 for the remaining 2 outputs.

我试图这样做，但是它对我不起作用.

I tried to do this, But it is not working for me.

load in.data
load out.data
x = in(:1);
y = in(:2);

learning rate = 0.2;
max_iteration = 50;

function result = calculateOutput(weights,x, y)
s = x*(weights(1) +weight(2) +weight(3));
if s>=0
 result = 1
else:
 result = -1
end
end

Count = length(x);
weights[0] = rand();
weights[1] = rand();
weights[2] = rand();

iter = 0;
do {
  iter++;
  globalerror = 0;
  for(p=0; p<count;p++){
    output = calculateoutput(weights,x[p],y[p]);
    localerror = output[p] - output
    weights[0]+= learningrate *localerror*x[p];
    weights[1]+= learningrate *localerror*y[p];
    weights[2]+= learningrate *localerror;
    globalerror +=(localerror*localerror);
   }
}while(globalerror != 0 && iter <= max_iteration);

此算法的错误在哪里?

我指的是下面链接中给出的示例:-

I am referring the example given in the link below:-

感知器学习算法未收敛到0

推荐答案

以下是我认为有误的列表:

Here's a list of what I see wrong:

深呼吸

• 索引语法(:1)不正确.也许您的意思是(:,1)，如列1的所有行"中一样.
• 在MATLAB中没有do ... while循环之类的东西.仅 FOR 和不等于" MATLAB中的运算符是~=，而不是!=.
• 对向量和矩阵进行索引需要用括号()而不是方括号[].
• 所有这些都在功能中还是脚本?您无法在脚本中定义函数，即calculateOutput.您必须将其放在自己的m文件calculateOutput.m中.如果所有代码实际上都在一个较大的函数中，则calculateOutput是嵌套函数，并且应该可以正常工作(假设您已经用end结束了较大的封闭函数).
• 对于变量名，您有许多明显的错别字:
  • weight与weights(根据
  • The indexing syntax (:1) is incorrect. Perhaps you mean (:,1) as in "all rows of column 1".
  • There is no such thing as a do...while loop in MATLAB. Only FOR and WHILE loops. Also, your for loop is defined wrong. MATLAB has a different syntax for that.
  • There are no ++ or += operators in MATLAB.
  • The "not equal" operator in MATLAB is ~=, not !=.
  • Indexing of vectors and matrices needs to be done with parentheses (), not square brackets [].
  • Is all of this inside a function or a script? You can not define functions, namely calculateOutput, in a script. You would have to put that in its own m-file calculateOutput.m. If all of the code is actually inside a larger function, then calculateOutput is a nested function and should work fine (assuming you have ended the larger enclosing function with an end).
  • You have a number of apparent typos for variable names:
    • weight vs. weights (as per phoffer's answer)
    • Count vs. count (MATLAB is case-sensitive)
    • calculateOutput vs. calculateoutput (again, case-sensitivity)
    • learning rate vs. learningrate (variables can't have spaces in them)

    大量呼气;)

    简而言之，它需要大量工作.

    In short, it needs quite a bit of work.

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