Standard Deviation

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Firoz Alam
Firoz Alam on 28 Sep 2011
Hi, I have S=[2 4 4 4 5 5 7 9]; can any one tell me how can I count and plot standard deviation in this values?
  2 Comments
Image Analyst
Image Analyst on 28 Sep 2011
Sorry, no. Not until you supply more info on what you mean, like why you expect more than one standard deviation from that set of observations.
Firoz Alam
Firoz Alam on 29 Sep 2011
or if the data set is s = [1:5; 6:10; 11:15], what will b the Std and std plot plz ? each row represent freq and column measurement valus... hope u undstd now

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Accepted Answer

Walter Roberson
Walter Roberson on 29 Sep 2011
numdev = floor((mean(S)-min(S))./std(S));
Determining the position of each standard deviation and plotting is left as a homework exercise.
Though possibly you want
numdev = floor((mean(S,2)-min(S,[],2))./std(S,[],2));
  4 Comments
Firoz Alam
Firoz Alam on 30 Sep 2011
thnx :)
Shivakumar
Shivakumar on 25 Sep 2013
Thank you. I was helped by the answer.

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More Answers (1)

the cyclist
the cyclist on 29 Sep 2011
The standard deviation of the values in S can be calculated with the std() command:
>> std(S)
I'm not sure what you mean by plotting that standard deviation.
  3 Comments
the cyclist
the cyclist on 29 Sep 2011
Sorry, but I am very confused. The standard deviation is one number. What exactly do you want to plot? What are you trying to do, see, or understand about that set of numbers by plotting? Type "help plot" for help on one simple plotting command.
Firoz Alam
Firoz Alam on 30 Sep 2011
its done ! thnx :)

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