st: problem with graph mspline, scheme(s2mono) (bug??)

[Ricardo Ovaldia <ovaldia@yahoo.com>]

I am ploting several curves using msplines with options -scheme(s2mono)- and also -scheme(sj)-. 
However, neither one seems to give me different line types wheh plotting more than one line per graph. Is this a bug or am I doing something wrong?
 
Here is a simple example with the auto data:
 
 sysuse auto, clear
. graph twoway (lfit  weight length if  foreign==0)  (lfit  weight length if  foreign==1), scheme(s2mono)
 
< this produces a graph with two line, one solid and another "dashed".
 
. graph twoway (mspline  weight length if  foreign==0)  (mspline  weight length if  foreign==1), scheme(s2mono)

< this also produces a graph with two line, but theya re both solid .
 
I know that I can use -lpattern()-, but I rather not have to do that.
 
 
Thank you in advance,
Ricardo

Ricardo Ovaldia, MS
Statistician 
Oklahoma City, OK

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