Generate a correlated distribution

A

adan

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Oct 31, 2020
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Hi,
I have a list of items each having a value between 0 and 1. I want to add another value to each item such that the new value is negatively/positively correlated with the first value.
The new value should be between 0 and 5.
Is there any formula that I can use for that? I would appreciate your help.
Thanks
 
adan said:
Hi,
I have a list of items each having a value between 0 and 1. I want to add another value to each item such that the new value is negatively/positively correlated with the first value.
The new value should be between 0 and 5.
Is there any formula that I can use for that? I would appreciate your help.
Thanks
Click to expand...
I suggest you right a formal (formulaic?) statement of the problem -- this often helped me to figure out the solution.
 
blamocur said:
I suggest you right a formal (formulaic?) statement of the problem -- this often helped me to figure out the solution.
Click to expand...
Hi, thanks for your comment. I find it challenging to formulate the problem, I am not a mathematican.
 
adan said:
Hi, thanks for your comment. I find it challenging to formulate the problem, I am not a mathematican.
Click to expand...
I do not understand your question. Correlation requires two variables/vectors.
How did you find the correlations of the 5 values you have? Please share your work.
 
adan said:
Hi,
I have a list of items each having a value between 0 and 1. I want to add another value to each item such that the new value is negatively/positively correlated with the first value.
The new value should be between 0 and 5.
Is there any formula that I can use for that? I would appreciate your help.
Thanks
Click to expand...
Is this problem related to the problem you had posed in:

Build functions

Hi, This is part of a project I am currently working on. I want to build two functions of one indpenendent variable x between 0-1, and the dependent variable y between 0-5. In the first function y and x have a positive relation. In the second function, y has a negative relation with x. Any...
www.freemathhelp.com

And you have not responded to the "request for more information".
 
Subhotosh Khan said:
Is this problem related to the problem you had posed in:

Build functions

Hi, This is part of a project I am currently working on. I want to build two functions of one indpenendent variable x between 0-1, and the dependent variable y between 0-5. In the first function y and x have a positive relation. In the second function, y has a negative relation with x. Any...
www.freemathhelp.com

And you have not responded to the "request for more information".
Click to expand...

Hi,
Thanks for your comment.
This problem is not the same one you mentioned.

I could not find an edit option so I can add more details. It seems that I missed explaining the problem concisely. Sorry for that!

There is a variable X that holds more than 1000 items, each item is a tuple (i,j). I have already computed i using a given data. Now I need to generate random values for j between 0 and 5 such that:
j is positively correlated with i
j is negatively correlated with i
 
Last edited:
adan said:
Hi,
Thanks for your comment.
This problem is not the same one you mentioned.

I could not find an edit option so I can add more details. It seems that I missed explaining the problem concisely. Sorry for that!

There is a variable X that holds more than 1000 items, each item is a tuple (i,j). I have already computed i using a given data. Now I need to generate random values for j between 0 and 5 such that:
j is positively correlated with i
j is negatively correlated with i
Click to expand...
Still don't understand your question, but if you set i=j, then i and j would correlate positively and perfectly. But that's not randomly generated?
 
Subhotosh Khan said:
Is this problem related to the problem you had posed in:

Build functions

Hi, This is part of a project I am currently working on. I want to build two functions of one indpenendent variable x between 0-1, and the dependent variable y between 0-5. In the first function y and x have a positive relation. In the second function, y has a negative relation with x. Any...
www.freemathhelp.com

And you have not responded to the "request for more information".
Click to expand...
Did you finish the problem that you had posted in your thread above.

What did you derive as answer ?
 
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