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how to plot a normal distribution and calculate mean and standard deviation ?

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Amr Hashem
Amr Hashem 2015-9-17
评论： Amr Hashem 2015-9-18
I have a data which is (4259*1 cell)
i want to get its normal distribution and to calculate its mean and standard deviation to get a graph like this:
I try :
[ndata text alldata] = xlsread('final53.xlsx','device age manuf');
[R,C]=size(alldata);
colsize=max(C);
data=alldata(:,14);
[mean,st]=normfit(data);
but i get an error:
Undefined function or method 'times' for input
arguments of type 'cell'.
Error in ==> normfit at 102
sumx = sum(freq.*x);
Error in ==> plotdata at 42
[mean,st]=normfit(data);
how to plot the normal distribution and calculate mean and standard deviation?

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采纳的回答

Star Strider
Star Strider 2015-9-17
One option is to use the cell2mat function to define ‘data’ as a double array.

更多回答（1 个）

Image Analyst
Image Analyst 2015-9-17
Try using ndata instead of alldata.

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