"Roger Stafford" <ellieandrogerxyzzy@mindspring.com.invalid> wrote in message <i35j1b$pal$1@fred.mathworks.com>...
> "kaleigh " <itsmeklee14@yahoo.com> wrote in message <i35esb$7q4$1@fred.mathworks.com>...
> > I am trying to plot something in matlab and cannot get anything but the axis showing up..
> >
> > I have a 6x6 matrix with sind(i) and cosd(i) in it, where i is an angle I need to vary from 0 to 30 degrees. My code I am using is
> >
> > for i = 0:1:30
> > A= [1 0 0 0 0 1; 0 1 0 1 0 0; 1 0 1 0 1 0; (.3*(cosd(i))) 0 0 0 0 0; ((.3*(sind(i))+.4)) 0 0 0 .8 0; (.3*(cosd(i))) 0 0 .8 0 0];
> > C = [0; 0; 981; 98.1; 490.5; 0];
> > D=inv(A);
> > F=D*C;
> > plot(F(6,:),i);
> > end
> >
> > Where F= [P, Ryb, Rzb, Rya, Rza, Rxa] and I need the plot of Rxa verse i (030 degrees).
> >
> > I am not very familiar with matlab so this maybe completely wrong but please help.
>            
> You need to do a "hold on" so that the successive points plotted do not erase previous points. If you look carefully at your plot you should see the last surviving point there as a single tiny point for i = 30.
>
> Another way is to store successive values of Rxa in an array and do the plot on this array versus the array 0:30 .
>
> Roger Stafford
In addition to Roger's suggestion, you might also consider replacing
plot(F(6,:),i);
by
plot(F(6,:),i, 'o');
or some other marker. Read the help for plot to learn more...
Cheers,
Ross
