Find neighboring values of a target value in array

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Georg Söllinger
Georg Söllinger 2016-9-12
评论： Walter Roberson 2016-9-13
Hi everybody,
I have a matrix, whose values represent the points of geometry-changes of a specific 3D geometry (mainly sorts of angularly aligned cuboids) in intervals. What I want to do is: enter a height, in which the geometry is analyzed. Afterwards, the 2D geometry in the user defined height is processed.
With my knowledge, I would achieve the solution with a combination of for-loop (heigth-direction entities of the matrix) and some if-conditions, but I am sure, there exists a more elegant solution for my problem.
Is there any function, which finds the two height-value neighbors in the matrix entities? Then, the interpolation part is not a problem any more.
Can anyone help me? Thanks in advance!
Best wishes, Georg

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回答（1 个）

Walter Roberson
Walter Roberson 2016-9-13
Depending on how your values are represented, slice() might be what you need.
  2 个评论
Georg Söllinger
Georg Söllinger 2016-9-13
Hello Mr. Roberson,
Thanks for your reply! Actually, this function is not really what I need. I have z-Values arranged in an array together with x and y values, e.g.:
z = [7.200;16.715;36.245]
x = [...;...;...]
y = [...;...;...]
and e.g. a desired height of 30 -> the neighboring values in the array are 16.715 & 36.245. The function should either return the values or their array index.

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