Chapter 4: Programming in Matlab - College of the Redwoods

330 Chapter 4 Programming in Matlab
We draw the square in counterclockwise order of vertices, starting at the
point (1, 1). In that order, we set the x- and y-values of the vertices in the vectors
x and y. We then draw the square with a thickened line width and color it dark
blue.
x=[1,-1,-1,1,1]; y=[1,1,-1,-1,1];
line(x,y,’LineWidth’,2,’Color’,[0,0,0.625])
Next, we set the number of darts thrown at 1000. Then we plot one dart
at the origin, change its linestyle to ’none’ (points will not be connected with line
segements), choose a marker style, and color it dark blue.
N=1000;
dart=line(0,0,...
’LineStyle’,’none’,...
’Marker’,’.’,...
’Color’,[0,0,0.625]);
In the loop that follows, we use the handle to this initial dart to add x- and
y-data (additional darts). First, we set the number of hits (darts that land inside
the circle) to zero (we don’t count the initial dart at (0, 0)).
hits=0;
for k=1:N
x=2*rand-1;
y=2*rand-1;
set(dart,...
’XData’,[get(dart,’XData’),x],...
’YData’,[get(dart,’YData’),y])
%drawnow
if (x^2+y^2