Display

Note

Colour attributes, in the current FEMAG versions, should be declared in strings , e.g. “red” instead of red.

Command: grf_clear()

Deletes the contents of the graphics window.

Command: adapt_window()

Adjusts a section of the graphics window to it contents.

Command: draw_spels()

Draw the superelements.

Command: draw_ndchns()

Draw node chains.

Command: draw_elem(elkey, color, mode)

Draw an element in a specified colour

Parameter

elkey element number

color colour (“red”, “blue”, “green”)

mode 0 : display without edges; 1 : display with edges

Example: Addressing by element number

draw_elem(elkey,"blue",0)
draw_elem(elkey,blue,0)        -- deprecated version

Command: draw_elem(x, y, color, mode)

Draw an element in a specified colour

Parameter

x,y x,y coordinates

color colour (“red”, “blue”, “green”)

mode 0 : display without edges; 1 : display with edges

Example: Addressing by coordinates

draw_elem(x,y,"blue",0)
draw_elem(x,y,blue,0)         -- deprecated version

Command: draw_mesh_edge()

Draw the mesh.

Command: save_metafile(file)

Save the contents of the graphics window as an image file.

Parameter

file file name, with extension (.eps, .PS, .svg)

Command: plot_2d(x, y, pos)

Create a line plot in the graphics window based on the pair values x and y at the position pos

Parameter

x,y x,y coordinates

pos position code

Example:

px, py = {}, {}          -- generate example data
for i=1,400 do
  px[i] = i
  py[i] = math.sin(i/180*math.pi)
end

plot_2d(pxx,pyx,6)     -- plot the diagramm

Further display adjustments can be made with arguments that are passed in a data structure like the following example shows.

Example: Expanded call with optional arguments (opt.).

plot_2d(x = px,                -- x data array
         y = py,                -- y data array
         pos = 7,               -- placement code
         xmin = 0,              -- x range lower limit (opt.)
         xmax = 400,            --         upper limit (opt.)
         ymin = 0,              -- y range lower limit (opt.)
         ymax = 1,              --         upper limit (opt.)
         xlabel = "xlabel",     -- x axis label (opt.)
         ylabel = "ylabel",     -- y axis label (opt.)
         ylabel2 = "ylabel2",   --        sub label (opt.)
         color = "blue")       -- color code or description string (opt.)

See also applications examples Ausgabe von Diagrammen und Verwendung von poc-Files in individuellen Berechnungsabläufen.