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st: BatPlot options and Creating a Matrix


From   Diego Bellavia <messadua@yahoo.it>
To   STATAlist <statalist@hsphsun2.harvard.edu>
Subject   st: BatPlot options and Creating a Matrix
Date   Thu, 4 Aug 2011 12:44:46 +0100 (BST)

Dear Statalisters, 

I am struggling with batplot (quiet successfully I must say) and I have a couple 
of questions regarding the use of this command: 


1) Is there any way to modify the Y axis label options so that the "dashed" 
green line would be centered to 0 value on Y axis and the limits of agreements 
would be symmetric around the zero then ? Using the ylab options I can change 
the label but not the position of the graph...

2) The "grey" area defined by the B-A plot (using the notrend option) defines 
95% limits of agreeement, am I correct ? 


3) My Mentor here asked me to compute the "Bias" for the inter-observer 
agreement in the same dataset of measures. I am assuming this is the simple 
coefficient of variation (obtained as 100 * SDdiff / Mean-diff) am I correct ? 



I have also another question, totally unrelated to B-A plots: 

I have to run several simple regression models and would like to automatically 
group results (R2, regression coefficients and their standard deviation) having 
those automatically in a new table (instead of copying them manually, as I am 
doing at this time). I was thinking to create a script to build a matrix 
including all results in a polished matter...but I am not sure that would be the 
correct approach or even how to do it, any help would be greatly appreciated !

Thank you always for your help, 

Diego

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