Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Bill, (and Ugo),Thanks for that pointer. That's exactly what I need. I've translated it to Jython, and it seems to work, but not quite (or maybe I'm missing something): the bars are tied to the values in samples_Precip as symbols through pBarMap, and the bar lengths are tied to the same values with pBarScaleMap. And I get the part about having the pBars.coordinates to be a vertical line of arbitrary length to be controlled by samples_Precip.
Given that the arbitrary lines defined for pBars are (0.0, 0.0, 0.0, 0.0, -0.1, 0.0), and that my precipitation values are always positive, I expect to see vertical lines coming from below the horizontal axis up to my data points. Instead, I see bars floating in mid-air, starting at the data point, and extending a vertical distance upwards that is controlled by the value along the y-axis. I have to change the '-0.1' to '-10.0' in order to see what I describe above. I guess I need a rangewidget to cut off those lines at y=0.0.
Can anyone explain the threshold effect of the negative value for the pBars - shouldn't any negative value cause the desired lines from below y=0 up to the data point?
Apart from that question, the idea is awesome - I think it'll let me do everything I need to do. Too bad it doesn't appear to be in the tutorials anywhere... What's the status of that - is there some way to contribute examples, tutorial material, etc to this project?
Thanks, -Frank At 11:01 AM 8/5/2002, Bill Hibbard wrote:
Hi Frank, > I'm trying to create a two-dimensional display of some mass-spectrometry > results (observed and theoretical). For my particular work right now, that > means I'd like to create the following for each data point (x,y): > > 1. a vertical line that runs from (x,0) up to (x,y) > 2. a point somewhere along that vertical line (probably at the > top), indicating the mean value of the signal y for that x-value. > 3. two (or more) horizontal bars, one above the mean point, one > below, to indicate some kind of statistics (standard deviation, percentile > score, ... - basically some kind of error bar) > > From Ugo's excellent tutorial, I can see how to put in the point (in 2. > above) along with the lines. However, it's not clear how I can put in the > vertical lines. I guess I can fulfill 1. and 3. by using subs.drawLine() > function to draw the lines item by item. I'm just wondering if there isn't > a more "built-in" way of doing this for the set as a whole. See Ugo's message about making bar graphs at: http://www.unidata.ucar.edu/glimpse/visad-list/1107 You may be able to translate this logic into VisAD-Python. > Also, if I wanted to use a symbol for the point-markers in 2., is there any > way for me to do that? Instead of just a dot, could I put in a 'star' (*), > a cross (+) or some other textual symbol easily? The Shape logic may help you do this. This logic is accessible from VisAD-Python as described at: http://www.unidata.ucar.edu/glimpse/visad-list/3183 Good luck, Bill ---------------------------------------------------------- Bill Hibbard, SSEC, 1225 W. Dayton St., Madison, WI 53706 hibbard@xxxxxxxxxxxxxxxxx 608-263-4427 fax: 608-263-6738 http://www.ssec.wisc.edu/~billh/vis.html
PhD, Computational Biologist, Harvard Medical School BCMP/SGM-322, 250 Longwood Ave, Boston MA 02115, USA.Tel: 617-432-3555 Fax: 617-432-3557 http://llama.med.harvard.edu/~fgibbons
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