Hi,
I have a graph where I want to label each symbol with its own text to
identify it. I know I can do this using graph.style.text and specifying a
text= column and a general dx= and dy= for placement. The problem with this
is that since some of the symbols are close together the text labels then
overlap.
So I would like to specify the positions of the symbol labels individually,
to make the layout nicer. I was reading that you can do this by specifying a
dxname= and a dyname= column containing values and then a dxunit= and a
dyunit=. Well at this that is what I understand this to mean from the Pyx
manual:
"Alternatively you can specify a dxname and a dyname and provide appropriate
data in those columns to be taken in units of dxunit and dyunit to specify
the position of the text for each point separately."
I have tried this but it comes up with an error of " TypeError: __init__()
got an unexpected keyword argument 'dxunit'"
I am not sure if this is the way I have my script set up or if I am
misinterpreting what the dxname/dxunit functionality is for.
Could someone please tell me how to individually specify the position of the
labels?
This is my script:
from pyx import*
text.set(mode="latex")
text.preamble("\usepackage{wasysym}")
text.preamble("\usepackage[version=3]{mhchem}")
c = canvas.canvas()
g1=graph.graphxy(width=8,x=graph.axis.linear(min=0,max=70,title="cumulative
\%
yield"),y=graph.axis.linear(min=-20,max=20,title="$\delta$\ce{^{15}N}$_{AIR}
$ \permil"))
g1.plot(graph.data.file("roomn.dat", x=2, y=3, text=1, dxname=4, dyname=5,
title="precipitated at room
temperature"),[graph.style.symbol(graph.style.symbol.square,
size=0.15*unit.v_cm,
symbolattrs=[deco.stroked([color.rgb.black]),deco.filled([color.rgb.white])]
), graph.style.text(dxunit=0.25*unit.v_cm, dyunit=0.25*unit.v_cm)])
c.insert(g1)
g2=graph.graphxy(width=8,x=graph.axis.linear(min=0,max=70,title="cumulative
\%
yield"),y=graph.axis.linear(min=-30,max=30,title="$\delta$\ce{^{2}H}$_{SMOW}
$ \permil"),ypos=g1.ypos+g1.height+2)
g2.plot(graph.data.file("roomd.dat", x=2, y=3, text=1, dxname=4, dyname=5,
title="precipitated at room
temperature"),[graph.style.symbol(graph.style.symbol.square,
size=0.15*unit.v_cm,
symbolattrs=[deco.stroked([color.rgb.black]),deco.filled([color.rgb.black])]
), graph.style.text(dxunit=0.25*unit.v_cm, dyunit=0.25*unit.v_cm)])
c.insert(g2)
c.writePDFfile("room")
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