How can I create a 1X250 array with every 50 numbers being the same?

6 次查看（过去 30 天）

Rebeca Miyar 2018-8-15

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/414919-how-can-i-create-a-1x250-array-with-every-50-numbers-being-the-same

编辑： Stephen23 2018-8-15

I'm trying to create a matrix in matlab that is 1X250, that every 50 numbers are the same. It needs to look something like this: [111222333...] I tried the following code:

E=[zeros(1,NOE)];
E(1:50)=E_1;
E(51:100)=E_2;
E(101:150)=E_3;
E(151:200)=E_4;
E(201:250)=E_5;

While E_1/2/3/4/5 are num. that I defined earlier in program. I keep getting an error, what can I do?

5 个评论
显示 3更早的评论隐藏 3更早的评论

Rebeca Miyar 2018-8-15

It worked now, just had a problem with one of the variables, thank you very much for your help!

Stephen23 2018-8-15

编辑：Stephen23 2018-8-15

在 MATLAB Online 中打开

@Rebeca Miyar: note that these square brackets do nothing:

E=[zeros(1,NOE)];

Square brackets are a concatenation operator, and you are not concatenating anything together with that code: zeros already returns a vector, so the square brackets do nothing whatsoever, except perhaps slowing your code down and making it more complex.

https://www.mathworks.com/matlabcentral/answers/35676-why-not-use-square-brackets

Using numbered variables is a sign that you are doing something wrong. If those variables are numbered and belong in a sequence, then they should be stored in one variable. This will make your code simpler and more efficient. For example, if you stored those value in one vector then you could have simply done this: