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I have a list of (x,y) pairs that form a cluster of points. I was able to find the mean of the cluster, but I'd like to be able to find the standard deviation of the cluster. How can I define the standard deviation? I defined the mean as the point (mean of x values, mean of y values).

What type of standard deviation value is typical for clusters like this? I'd imagine I could get a standard deviation of the spread, or something like that?

This looks good. Gaussian on a cluster:

Gaussian Data http://upload.wikimedia.org/wikipedia/commons/thumb/d/d8/EM-Gaussian-data.svg/500px-EM-Gaussian-data.svg.png

How do I do this?

I have a list of (x,y) pairs that form a cluster of points. I was able to find the mean of the cluster, but I'd like to be able to find the standard deviation of the cluster. How can I define the standard deviation? I defined the mean as the point (mean of x values, mean of y values).

What type of standard deviation value is typical for clusters like this? I'd imagine I could get a standard deviation of the spread, or something like that?

This looks good. Gaussian on a cluster:

How do I do this?

I have a list of (x,y) pairs that form a cluster of points. I was able to find the mean of the cluster, but I'd like to be able to find the standard deviation of the cluster. How can I define the standard deviation? I defined the mean as the point (mean of x values, mean of y values).

What type of standard deviation value is typical for clusters like this? I'd imagine I could get a standard deviation of the spread, or something like that?

This looks good. Gaussian on a cluster. How do I do this?

http://en.wikipedia.org/wiki/File:EM-Gaussian-data.svg

I have a list of (x,y) pairs that form a cluster of points. I was able to find the mean of the cluster, but I'd like to be able to find the standard deviation of the cluster. How can I define the standard deviation? I defined the mean as the point (mean of x values, mean of y values).

What type of standard deviation value is typical for clusters like this? I'd imagine I could get a standard deviation of the spread, or something like that?

This looks good. Gaussian on a cluster:

Gaussian Data http://upload.wikimedia.org/wikipedia/commons/thumb/d/d8/EM-Gaussian-data.svg/500px-EM-Gaussian-data.svg.png

How do I do this?

I have a list of (x,y) pairs that form a cluster of points. I was able to find the mean of the cluster, but I'd like to be able to find the standard deviation of the cluster. How can I define the standard deviation? I defined the mean as the point (mean of x values, mean of y values).

What type of standard deviation value is typical for clusters like this? I'd imagine I could get a standard deviation of the spread, or something like that?

I have a list of (x,y) pairs that form a cluster of points. I was able to find the mean of the cluster, but I'd like to be able to find the standard deviation of the cluster. How can I define the standard deviation? I defined the mean as the point (mean of x values, mean of y values).

What type of standard deviation value is typical for clusters like this? I'd imagine I could get a standard deviation of the spread, or something like that?

This looks good. Gaussian on a cluster. How do I do this?

http://en.wikipedia.org/wiki/File:EM-Gaussian-data.svg