How to calculate mean or variance in a string ?

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Hi, I have a jumbled text and i wish to straighten it out using machine learning . I wanted to calculate the variance of the jumbled text . Can anyone suggest me a method on how to do it ?
  2 Comments
Salaheddin Hosseinzadeh
Salaheddin Hosseinzadeh on 26 Aug 2014
Hi Mani,
I've no idea how to do that.
Do yourself a favor, add this details to your question, because I'm going to remove my answer so other ppl notice your question is left unanswered.
Thanks.
Star Strider
Star Strider on 26 Aug 2014
What do you mean by ‘jumbled text’? Is it a replacement cipher, with one letter replacing another repeatedly ( i.e. a=m, g=b, q=e ) or some such?

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Accepted Answer

Andrew Reibold
Andrew Reibold on 26 Aug 2014
Edited: Andrew Reibold on 28 Aug 2014
You can convert to ascii equivalent, then find variance.
jumble_text = 'alskdjbfalksjbdf'
ascii_text = double(jumble_text)
mean_text = mean(ascii_text)
squared_dif = (ascii_text - mean_text).^2
variance = mean(squared_dif)

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