Hello everyone,
I'm looking for a way to find the horizontal (x) position of a bar in a
bar graph. I need it because I would like to draw some graphics aligned
underneath each of the bars. The following code does find the position
of the right edge of each of the bars, but it would be more useful to be
able to find where the middle of each bar is. If I knew the width of
each bar I could calculate the position of its middle by doing: x_middle
= x_right - width/2, but I don't really know how to do that either.
Thanks in advance,
Stathis
from pyx import *
d = graph.data.list([
("A", 1404),
("B", 918),
("C", 850)
], y=2, xname=1)
g = graph.graphxy(
width=8,
x=graph.axis.bar(),
y=graph.axis.linear(min=0, max=2000)
)
g.plot(d, [
graph.style.bar([color.rgb.white]),
graph.style.text("y")])
g.dolayout()
x = g.axes["x"].convert(("A", 1));
x = x * g.width + g.xpos;
g.stroke(path.line(x, g.ypos, x, g.ypos + g.height));
x = g.axes["x"].convert(("B", 1));
x = x * g.width + g.xpos;
g.stroke(path.line(x, g.ypos, x, g.ypos + g.height));
x = g.axes["x"].convert(("C", 1));
x = x * g.width + g.xpos;
g.stroke(path.line(x, g.ypos, x, g.ypos + g.height));
g.writePDFfile("graph")
-------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
_______________________________________________
PyX-user mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/pyx-user
