Hi! I am a beginner user, I would like to plot a Quadrilateral shape function that I am studing. I know the theoretical functions and the graphical results (show bellow) but I am failing to plot the same graphics.
Just the first plot seems to be correct.
[s,t]=meshgrid(0:0.1:1,0:0.1:1)
N1=(1/4)*(t-1)*(s-1);
subplot(2,2,1)
surf(s,t,N1)
[s,t]=meshgrid(0:0.1:1,0:0.1:1)
N2=@(s,t)(1/4)*(t+1)*(s-1);
subplot(2,2,2)
surf(s,t,N2(s,t))
[s,t]=meshgrid(0:0.1:1,0:0.1:1)
N3=@(s,t)(1/4)*(t+1)*(s+1);
subplot(2,2,3)
surf(s,t,N3(s,t))
[s,t]=meshgrid(0:0.1:1,0:0.1:1)
N4=@(s,t)(-1/4)*(t-1)*(s+1);
subplot(2,2,4)
surf(s,t,N4(s,t)
Thank you.
Best Answer