5.4.2 Captions and Presentation

• xgrid : adds a grid on a 2D graphic; the calling parameter is the number of the color.
• xtitle : adds title above the plot and axis names on a 2D graphic
• titlepage : graphic title page in the middle of the plot

  //Presentation
  x=-%pi:0.3:%pi;
  y1=sin(x);y2=cos(x);y3=x;
  X=[x;x;x]; Y=[y1;y2;y3];
  plot2d1("gnn",X',Y',[1 2 3]',"111","caption1@caption2@caption3",...
  [-3,-3,3,2],[2,20,2,5]);
  xtitle(["General Title";"(with xtitle command)"],"x-axis title","y-axis title (with xtitle command)");
  xgrid();
  xclea(-2.7,1.5,1.5,1.5);
  titlepage("Titlepage");
  xstring(0.6,.45,"(with titlepage command)");
  xstring(0.05,.7,["xstring command after";"xclea command"],0,1);
  

  Figdirfigures/
  

    

  Figure 5.5: Grid, Title eraser and comments

  
  
  

• plotframe : graphic frame with scaling and grid

We have seen that it is possible to control the tics on the axes, choose the size of the rectangle for the plotand add a grid. This operation can be prepared once and then used for a sequence of different plots. One of the most useful aspect is to get graduations by choosing the number of graduations and getting rounded numbers.

rect=[-%pi,-1,%pi,1];
tics=[2,10,4,10];
plotframe(rect,tics,[%t,%t],...
['Plot with grids and automatic bounds','angle','velocity']);

• graduate : a simple tool for computing pretty axis graduations before a plot.