Flatten a (x,y,z,data) surface and save as a matrix

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TheDude 2020 年 7 月 8 日

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https://jp.mathworks.com/matlabcentral/answers/561938-flatten-a-x-y-z-data-surface-and-save-as-a-matrix

回答済み: Prabhan Purwar 2020 年 7 月 13 日

I am calculting spherical harmonics projected on an oblate spheroid via surf(x,y,z,data) - example output like:

I would like to save a matrix that is the flattened version of this via some set perspective (the plot below is constructed from the above plot with the view(90,0) command included):

While this output gives the exact appearance that I am looking for, I do not know how to save this data into another matrix.

I imagine some loop that cuts through a section each itteration and saves the values into a blank matrix, however, I was wondering

if there was a built in function or some better way to go about this... Thank you!

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TheDude 2020 年 7 月 11 日

I am looking for a way to directly manipulate the data like an image, but not from a screenshot type of interpretation. Thank you though

Walter Roberson 2020 年 7 月 11 日

For each x y z combination is there x y -z exactly? or is it x y z and approximately x approximately y approximately -z?

Is the view needed only viewing from above on the z towards negative z or are arbitrary other angles required?

Are x and y strictly rectangular equal spaced, or is it only x that is equal spaced and y is not equal spaced in linear coordinates (e.g. might be linear spaced in a different coordinate system)? For that matter is the original coordinate system equal spaced in polar coordinates rather than rectangular?

Note that equal spaced in linear coordinates implies nan in the data so it is probably not what you used.

These questions have to do with figuring out which coordinates are on "top" to be able to reject the coordinates "underneath" when creating the image.

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