Data visualization with SAS programming

What is the ELLIPSE statement used to do?

Reply
Frequent Contributor
Posts: 86

What is the ELLIPSE statement used to do?

Dear,

I am recently used the proc sgplot and found there is a ELLIPSE statement could be used after the scatter plot, after I read the documentation, I still felt confused about the rationale and function of the ELLIPSE. Could anyone help me on this?


Thanks in advance.

Super Contributor
Posts: 307

Re: What is the ELLIPSE statement used to do?

A ellipse is a graphical representation of the area in which a new obs would be expected to appear (at a given probability level, based on the x and y values in your data).

Frequent Contributor
Posts: 86

Re: What is the ELLIPSE statement used to do?

Dear Fugue,

Really appreciated for your help. Could I understand your words as this is a prediction plot at a given significance level based on the given x & y data?

Super Contributor
Posts: 307

Re: What is the ELLIPSE statement used to do?

That would be correct!

SAS Super FREQ
Posts: 3,234

Re: What is the ELLIPSE statement used to do?

For more information about prediction ellipses, see my blog post "Add a prediction ellipse to a scatter plot in SAS"

For statisticians who need to go beyond the capabilities of the ELLIPSE statement, see the advanced article "Computing prediction ellipses from a covariance matrix"

Post a Question
Discussion Stats
  • 4 replies
  • 351 views
  • 0 likes
  • 3 in conversation