compute the 2 dimensional (x,y) with respect to time

I have those numbers that is 0 50 0 1 50 -9.8 2 50 -19.6 3 50 -29.4 4 50 -39.2 5 50 -49.0

Which I saved to a.dat file.

Then I have to write a script to read a.dat data from this file into a martix. first column is time , second is x and third is y. Now it have to compute the 2 dimensional (x,y) with respect to time. So far I got : load a.dat time = a(:,1); x = a(:,2);y = a(:,3) plot (time,x,y,'r--')

but it said Error in mysricpt(line 4) plot (time,x,y,'r--')

How should I correct my code?thanks

Answer 1

[Roger Stafford]

Let 'a' be the given vector.

   plot3(a(1:3:end),a(2:3:end),a(3:3:end),'r-')

Answer 2

[Youssef Khmou]

As long as there are three variables, you need to use :

       plot3(t,x,y); %.....