Need multiple regression line on a scatter plot

[hansdecocq]

Hello

I'm able to produce a proper scatter plot
I manage to put the regression line on it as well. I do understand the equation.

I need extra regression line for MIN (X,Y) and Max (X,Y). (Want to emphasize the bandwidth)
Adding an extra trend line is no problem either, but to position it on the proper coordinates.

Do you have a suggestion form me
(read the other messages on the board but did they didn't work for me).

 

[Andrew Poulsom]

What do you mean by MIN(X,Y) and MAX(X,Y)?

 

[hansdecocq]

A trend-line between the value of the lowest X and the lowest Y variable and the same for the max value of the X and Y.

 

[Andrew Poulsom]

Can you post some sample data please?

 

[hansdecocq]

Can I post an excel-sheet? And how do I do that?

 

[Andrew Poulsom]

Just copy some data and paste it into a reply.

 

[GooberTron]

A workaround would be to plot a new series on the chart with those two points (minx,miny),(maxx,maxy) and then the linear trendline for that series will join them. However, if you want a proper prediction or confidence interval on the regression then that is a whole other story and probably best done in other software.

 

[hansdecocq]

Thanks for your sugestion I don't of this answers my question but I'll give it a try.
Copy and pasting a picture does not work on this board. And to send a copy of the data is not very informative for the solutoin of my quesntion. Is there an alternative for sending you the excel-sheet ?