vectors must be the same length

Question

0 个投票

I have position vector

r(t)=<t , t^2 , 2>,

I have to plot it using plot3 function and also plot tangent at the point P(-1 , 1, 2) but I cant figure it out. Can you help me please?

t = 0:pi/50:10*pi;
st = t;
ct = t.^2;
figure
plot3(st,ct,2)

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Kuatra Patil 2019-4-21

it is position vector's i j k components and t is variable for time

Image Analyst 2019-4-21

We're getting there, but not quite. So are you saying that

i, which is x, goes from some unspecified negative number up to 0
j, which is y, goes from some negative, unspecified t to some positive, unspecified t
k, which is z, goes from 2 up to some unspecified max z value.

Can you specify the unspecified range limits?

Answer 1

madhan ravi 2019-4-21

编辑：madhan ravi 2019-4-21

0 个投票

Make the vectors the same length then exactly as the error message tells you! 2 is a scalar, each component of your vector represents x, y & z.

plot3(st,ct,repmat(2,1,numel(t)))