How to calculate mean or variance in a string ?

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 ?

[Salaheddin Hosseinzadeh]

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]

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?

Answer 1

[Andrew Reibold]

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)