I would like to create a loop that creates a different variable name after each iteration

Question

I would like to create a set of distinct variables in the form of e_1, e_2, e_3... The number of variables would depend on the value of k as shown below.

for i = 1:k

  "create variable" = e_"i";

end

I will then want to call these variables; hence, I would need another loop that would be able to assign the correct value to each variable created before, or pull something out of the variable.

Why would you want to do this? Using an array will do the same job, right? http://www.ele.uri.edu/Courses/ele541/tutorials/matlab.html — Tharindu Rusira, Jul 09 '13 at 17:36
google it: http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F — user2482876, Jul 09 '13 at 17:48
possible duplicate of [How to concatenate a number to a variable name in MATLAB?](http://stackoverflow.com/questions/2809635/how-to-concatenate-a-number-to-a-variable-name-in-matlab), http://stackoverflow.com/q/16099398 — Amro, Jul 09 '13 at 17:52
Generally it is not considered good practice in Matlab to use variables like that. **Always** consider exploiting vector, matrix, cell, struct formats! — Schorsch, Jul 09 '13 at 18:18

score 1 · Accepted Answer · answered Jul 09 '13 at 17:50

1

One option would be to do something like this:

kk = 10;
for ii=1:kk
  eval(['e_' num2str(ii) '=[];'])
end

answered Jul 09 '13 at 17:50

m_power

3,156
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Thanks everyone, building a cell array solved all the problems – user2565552 Jul 09 '13 at 18:08

score -1 · Answer 2 · edited Dec 02 '15 at 12:35

I got just the fix for you. Was just trying to do the same thing. Needed to be able to create an array with an infinate number of variables. Here's what I came up with. Well, I was adding 2 variables at a time, so it may be a little different than your version.

String[] parts;
String x = "";
String var = "";
int i = 0;
//to add variables
if(x.contains("-"){
 x+="-"+var;
}
else{
x+=""+var;
}

then to get them, u just use.

if(x.contains("-")){
parts = x.split("-");
while(i<parts.length){
  var=parts[i];
  i++;
 }
}
else if (x!=""){
var = x;
}

Changing the variables is a whole other story. I'll let your gifted mind figure that out. I don't need that part yet.

*hint, you're going to have to loop and put together the whole String back together with the new variables. Hope this helped. Felt like this was a new way of looking at it.

I would like to create a loop that creates a different variable name after each iteration

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