st: weight marker symbol fill size and color?

[David Airey <david.airey@Vanderbilt.Edu>]

.

At this page, we see how to change symbol size by using (analytic)  
weights:

http://www.stata.com/support/faqs/graphics/gph/graphdocs/scatter5.html

e.g.,

webuse census
scatter death medage [w=pop65p], msymbol(circle_hollow)

Can we change both symbol size and color shading as in the R example  
below?

-Dave

###------------------create the test data.frame
y = c(.4, 1, 2.15, 1.8, 2.7, 2.2, 1.3, .25, 1.1, .1)
x = c(.35, .4, .41, 1.4, 2.1, 2.25, 2.15, 2.2, 1.45, 1.3)
z = c(9, 7, 7.5, 7.3, 7, 7.1, 7.75, 9.5, 8, 10)
d = data.frame(x = x, y = y, z = z)

d$col = gray(.5)
d$col[d$z>=9] = gray(.2)
d$col[d$z<7.5] = gray(.7)
#thikness = sqrt(d$y^2 + d$x^2)
thikness = abs(d$y) + abs(d$x)


###----------------simple, 2-D plot
plot(d$x, d$y, pch=19, cex=(d$z-min(d$z)/1.5), xlim = c(-1.5,4), ylim  
= c(-2.5,5), col=d$col)
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