How to calculate mean or variance in a string ?

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Mani 2014-8-26

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https://ww2.mathworks.cn/matlabcentral/answers/152346-how-to-calculate-mean-or-variance-in-a-string

编辑： Andrew Reibold 2014-8-28

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 ?

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Salaheddin Hosseinzadeh 2014-8-26

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 2014-8-26

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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Answer 1

Andrew Reibold 2014-8-26

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https://ww2.mathworks.cn/matlabcentral/answers/152346-how-to-calculate-mean-or-variance-in-a-string#answer_149864

编辑：Andrew Reibold 2014-8-28

在 MATLAB Online 中打开

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)