input file: snr_cnt
To plot the radial profile generated in the previous section:
xr> xplot xp> tabplot ``snr_cnt rad1 cnt/pix'' # sgraph must be given # these 3 parameters (input table, label of column giving x, # label of column giving y) as a group. If in interactive mode, # the 3 parameters must also be given as a group. # the second parameter is rad(one).
The plot will appear and will be autoscaled appropriately.
To make hardcopy type, xp> =gcur
Put cursor within plot boundary and type = .
Type q to return to text window.
To add error bars to above graph, the error bars must be generated then overlaid on existing graph.
xp> pltpar # puts plot parameter file in editor. move cursor to ``erraxis'', type 2 type ctrl x to exit editor (for emacs, ctrl d for vi) xp> epar tabplot move cursor to ``errcolumn'', type err/pix type ctrl x to exit editor (for emacs, ctrl d for vi) xp> tabplot ``snr_cnt rad1 cnt/pix'' append=yes # overlays data and error bars
N.B. Remember that this has permanantly changed the plot parameter file and the parameters must be reset for subsequent plots.