| PARTVELVEC procedure not overplotting despite setting over keyword, Trouble with OPLOT [message #77103] |
Wed, 27 July 2011 16:39 |
jake
Messages: 2
Registered: July 2011
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Junior Member |
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Hi all,
This is my first post on this message board so I will try and be as
succinct as possible. In essence, I have been trying to plot vector
arrows (using the partvelvec procedure) ontop of a previously plotted
flux distribution to help visualize the direction of a gradient. One
uncertainty I have is the coordinate system Partvelvec expects. One
individual I have communicated with believes that the program utilizes
"the data coordinate system of the positions you pass into
Partvelvec." Is this correct? I have been inclined to use normalized
coordinates after seeing a null plot spanning from 0 to 1 on the x and
y axes. I realize that if the positions I define in my argument do not
match up with the previously established positions, i.e. on the flux
distribution, then that could be particularly problematic in getting
the result I want. Apart from this, or perhaps because of this, my
setting the overplot keyword seemed to have no effect. Just to throw
in a few lines of interest from my code:
Partvelvec,grad_intensity_x,grad_intensity_y, xarrow, yarrow, $
color = 'white', /over, length = 0.1.
While this is somewhat vague I have taken care to verify that the
above arguments are adequately defined.
Also, just to try my luck in plotting something ontop of the
aforementioned flux distribution I have overplotted a couple asterisks
upon normalizing my data, calling:
pointx = [0.25, 0.75] & pointy = [0.25, 0.75]
OPLOT, pointx, pointy, color = 190, linestyle=0, $
SYMSIZE=10.0, PSYM=2
PLOTS, pointx, pointy, color=190, linestyle=0, $
SYMSIZE-10.0, PSYM=2, /NORMAL
PLOTS seemed to work better than OPLOT as OPLOT only partially
displayed an asterisk in the lower left window ontop of my color bar.
Any ideas why?
Thanks,
Jake
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