functions in graph.i - r

             range, ymin, ymax  
 
     sets the y-axis plot limits in the current coordinate system to  
     YMIN, YMAX, which may be nil or omitted to leave the corresponding  
     limit unchanged, a number to fix the corresponding limit to a  
     specified value, or the string "e" to make the corresponding limit  
     take on the extreme value of the currently displayed data.  
     Use    limits, xmin, xmin  
     to accomplish the same function for the x-axis plot limits.  
interpreted function, defined at i0/graph.i   line 773  

             raw_style: get_style, set_style, read_style, write_style  
             #include "style.i"  
 
     alternatives to the style= keyword of the window command which  
     allow the interpreter to set or get all the details of the  
     window style.  Include "style.i" and read the help for get_style.  
builtin function, documented at i0/graph.i   line 1439  

             rays=   plotting keyword  
 
     selects unadorned lines (rays=0), or lines with occasional ray  
     arrows (rays=1).  Ignored if type is "none".  The spacing and phase  
     of the occasional arrows can be altered using the rspace and rphase  
     keywords; the shape of the arrowhead can be modified using the  
     arroww and arrowl keywords.  
   PLOTTING COMMANDS: plg, plc  
keyword,  defined at i0/graph.i   line 979  

             redraw  
 
     redraws the X window associated with the current graphics window.  
builtin function, documented at i0/graph.i   line 278  

             region=   plotting keyword  
 
     selects the part of mesh to consider.  The region should match one  
     of the numbers in the IREG array.  Putting region=0 (the default)  
     means to plot the entire mesh, that is, everything EXCEPT region  
     zero (non-existent zones).  Any other number means to plot only  
     the specified region number; region=3 would plot region 3 only.  
   PLOTTING COMMANDS: plm, plc, plv, plf  
keyword,  defined at i0/graph.i   line 1076  

             rgb = rgb_read()  
          or rgb = rgb_read(n)  
 
     Read contents of current graphics window, or of graphics window N.  
     RGB is a 3xNXxNY array of char where NXxNY is the current shape of  
     the window in pixels.  RGB(1,,) is the red component, RGB(2,,) is  
     the green component, and RGB(3,,) is the blue component, with 0  
     black and 255 full intensity.  RGB(,,1) is the top row of the  
     window, RGB(,,2) the second row, and so on to RGB(,,0), which is  
     the bottom row.  (So RGB(,,::-1) to pli redraws a copy.)  
builtin function, documented at i0/graph.i   line 1376  

 rphase  
 
keyword,  defined at i0/graph.i   line 991  

             rspace=   plotting keyword  
          or rphase=   plotting keyword  
          or arroww=   plotting keyword  
          or arrowl=   plotting keyword  
 
     selects the spacing, phase, and size of occasional ray arrows  
     placed along polylines.  The spacing and phase are in NDC units  
     (0.0013 NDC equals 1.0 point); the default rspace is 0.13, and  
     the default rphase is 0.11375, but rphase is automatically  
     incremented for successive curves on a single plot.  
     The arrowhead width, arroww, and arrowhead length, arrowl are  
     in relative units, defaulting to 1.0, which translates to an  
     arrowhead 10 points long and 4 points in half-width.  
   PLOTTING COMMANDS: plg  
keyword,  defined at i0/graph.i   line 991