Index in position 2 exceeds array bounds (must not exceed 1).?

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ismail alakel
ismail alakel 2022-3-28
评论： Image Analyst 2022-3-29
hello
i made code
t=robot.fkine( th1 th2 th3);
g= t(1,4);
then show error
Index in position 2 exceeds array bounds (must not exceed 1).
how i can solve it
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回答（2 个）

Star Strider
Star Strider 2022-3-28
Ran in:
I am not certain what ‘t’ is.
However it appears to be a column vector, so the second index is not appropriate for it.
t = rand(5,1)
t = 5×1
0.2687 0.8310 0.7643 0.9909 0.8982
g = t(1,1)
g = 0.2687
g = t(1,4)
Index in position 2 exceeds array bounds. Index must not exceed 1.
.
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Star Strider
Star Strider 2022-3-29
The error indicates that is not reality.
However I get the feeling that this could require the Robotics Toolbox or some other function I don’t have.

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Image Analyst
Image Analyst 2022-3-28
编辑：Image Analyst 2022-3-28
What does this show:
t = robot.fkine(th1 th2 th3);
size(t) % Do NOT use a semicolon here!
g = t(1, 4);
If t is an N-by-1 column vector, try
g = t(4);
Actually that should work for either a row vector or a column vector.
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