I only want to display 'position' in animation while tend <= 12:
This is the trial:
restart:with(plots):
for tend from 0 to 50
while (tend <= 12) do
pos:=animate(textplot3d,[[-1.8,0,alpha*tend, 'position']], tend=0..50,frames=150);
od;
display(pos);
I receive error messages:
error, (in plots/animate) 0=0..50 is an invalid animation range
Then I try:
restart:with(plots):
while (tend <= 12) do
