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

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jarvan
jarvan 2014-10-26
回答： Roger Stafford 2014-10-26
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

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采纳的回答

Roger Stafford
Roger Stafford 2014-10-26
Let 'a' be the given vector.
plot3(a(1:3:end),a(2:3:end),a(3:3:end),'r-')

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Youssef Khmou
Youssef Khmou 2014-10-26
As long as there are three variables, you need to use :
plot3(t,x,y); %.....

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