• howto
• do a plot

do a plot

Initialisation

• At first a graphic figure should be prepared. It is possible to clear an existing figure or to generate a new one.
• Launch the following commands :

  • .

     scf(num) // create figure with number num or set figure num to the current figure
    
     clf(num) // clear figure num
    
    xdel(num)  // closes grafic windows num
    

All plotting action will be done in the currend figure. The variable num can be leaved out, to address the current figure (e.g. clf()).

example

• scf(0); //create figure
  clf(0); //clear figure
  //definition of the x-axis and the y values
  x= [0: (%pi/20): 2*%pi];
  y=sin(x);
  //plot the data
  plot2d(x,y);
  plot2d(x,2*y); // will be plotted in the same figure
  xdel(0); //close figure
  

Using plot2d()

Take a look at the scilab help.

Using gca()

Using gca is useful to change the setting of the figure.