复制网页上的代码后去除前面的序号的简便方法

 如下这种情况，复制完代码后，每行前面都有个标号：  

1: %% 看看写得wholeNetCost_and_grad 是否正确

2: DEBUG = true;

3: if DEBUG

4:     stackedAETheta=0.005 * randn(430, 1);

5:     inputSize = 20;

6:     trainData = randn(20, 100);

7:     hiddenSizeL1=10;

8:     hiddenSizeL2=10;

9:     numClasses=10;

10:     trainLabel= randi(10, 100, 1);%从[1,10]中随机生成一个100*1的列向量

11: [cost,grad] = wholeNetCost_and_grad(stackedAETheta, inputSize, hiddenSizeL1,hiddenSizeL2,numClasses, ...

12:                                              lambda,lambda2, sparsityParam, beta,trainData,trainLabel);

13:      %注意trainlabel输入需要是一个列向量                             

14: 

15: 

16: numGrad = computeNumericalGradient( @(x) wholeNetCost_and_grad(x, inputSize, hiddenSizeL1,...

17:                                                             hiddenSizeL2,numClasses, ...

18:                                              lambda,lambda2, sparsityParam, beta,trainData,trainLabel),...

19:                                        stackedAETheta  );                                    

20: 

21: disp([numGrad grad]);

22: diff = norm(numGrad-grad)/norm(numGrad+grad);

23: disp(diff);

24: end

------------------->解决办法：

首先将此段代码复制到【Word】或【UltraEdit】里，按住shift+alt键，进行选择序号，然后往下拖动，就会只选序号，而不选择文本内容。然后很简单，直接DELETE就OK了。