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

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?

[Stephan]

Hi,

if i understand correct, you do this:

% Some values to Play with
NOE = 250;
E_1 = 1;
E_2 = 2;
E_3 = 3;
E_4 = 4;
E_5 = 5;

% Build E 
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;

This code you use is working for me. What error do you get? Is the result not like expected?

[Rebeca Miyar]

This is the error I get: Error in Test_5 (line 93) 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; nothing to specific

[Stephan]

Please provide the complete red text. If possible attach your .m-file

[Rebeca Miyar]

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

[Stephen23]

@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:

vec = [1,2,3,4,5]
new = repelem(vec,50)

or for versions without repelem:

new = reshape(repmat(vec,50,1),1,[])

Simpler, better data design leads to simpler, better, more efficient code.