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B.14.2 Examples

Here are some examples of plot2d in use:

stilts plot2d in=cat.xml xdata=RMAG-BMAG ydata=BMAG
Plots a colour-magnitude diagram. Since no omode or out value has been specified, the plot is posted directly to the graphics display for inspection. By adding the parameter out=xyplot.eps the plot could be written to an Encapsulated Postscript file instead.

The generated plot is here.

stilts plot2d in=6dfgs_mini.xml xdata=RMAG-BMAG ydata=BMAG
              subset1=SGFLAG==1 name1=galaxy colour1=blue   shape1=open_circle
              subset2=SGFLAG==2 name2=star   colour2=e010f0 shape2=x size2=3
              xlo=-1 xhi=4.5 ylo=10 yhi=20 xpix=500 ypix=250
              out=xyplot2.png
Plots a colour-magnitude diagram with multiple subsets. The subsets are labelled "1" and "2" with separate sets of parameters applying to each. The selections for the sets are given by the subset* parameters; set 1 is those rows with the SGFLAG column equal to 1 and set 2 is those rows with the SGFLAG column equal to 2. The boundaries of the plot in data coordinates are set explicitly rather than being determined from the data (this is faster) and the plot size in pixels is also set explicitly rather than taking the default values. Output is to a PNG file.

The generated plot is here.

stilts plot2d in1=iras_psc.fits cmd1='addskycoords fk5 galactic RA DEC GLON GLAT'
              xdata1=GLON ydata1=GLAT
              auxdata1=FNU_100 auxlog=true auxflip=true size1=0 transparency1=3
              in2=messier.xml   cmd2='addskycoords fk5 galactic RA DEC GLON GLAT'
              xdata2=GLON ydata2=GLAT
              txtlabel2=RADIUS>16?("M"+ID):"" cmd2='addcol SIZE sqrt(RADIUS/2)'
              xerror2=SIZE yerror2=SIZE
              subset2a=true hide2a=true colour2a=black errstyle2a=ellipse
              subset2b=true hide2b=true colour2b=black errstyle2b=filled_ellipse
                            transparency2b=6
              xlabel='Galactic Longitude' ylabel='Galactic Latitude' title='The Sky'
              legend=false grid=false fontsize=12 fontstyle=bold-italic
              xlo=0 xhi=360 ylo=-90 yhi=+90 xpix=600 ypix=300
              out=skyplot.png
You can do quite complicated things.

The generated plot is here.


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Next: plot3d: Old-style 3D Scatter Plot
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Previous: Usage

STILTS - Starlink Tables Infrastructure Library Tool Set
Starlink User Note256
STILTS web page: http://www.starlink.ac.uk/stilts/
Author email: m.b.taylor@bristol.ac.uk
Mailing list: topcat-user@jiscmail.ac.uk