Cannot set camera position because of negative integers

Question

link 2021-1-30

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/731483-cannot-set-camera-position-because-of-negative-integers

评论： link 2021-1-31

So I want to set the camera position depending on a 3d point in the figure. If I print the current camera position to the console, I get the following output

campos =
  279.5283
 -101.4030
 -740.6563

If I want to set the camera position

cpos =
  347.2583
  -96.3936
 -711.3793
 
 campos(cpos');

I get the error 'Array indices must be positive integers or logical values.'

I don't understand what I am doing wrong, because the campos cleary also has negative values.

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Answer 1

Walter Roberson 2021-1-30

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https://ww2.mathworks.cn/matlabcentral/answers/731483-cannot-set-camera-position-because-of-negative-integers#answer_610413

在 MATLAB Online 中打开

campos =
279.5283
-101.4030
-740.6563

That tells us that you assigned something to a variable named campos

campos(cpos');

and now you are trying to use campos as a function. But it is not a function, it is a variable because you assigned to it.

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Walter Roberson 2021-1-31

Notice your output had "compos =" at the beginning of it. If you had been calling the campos() function, then the result would have started "ans =" . MATLAB only displays "NAME =" when there is a variable with the given name that is being displayed.

link 2021-1-31