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Surface plot interprets dims 1 and 2 of a matrix to be y and x (should be reversed)

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
35/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
r

Research direction

Start with the plot_ly(z = ~volcano, type = "surface") example and trace how matrix dimensions are mapped for surface plots. Compare the convention with MASS::kde2d(), then verify that the first matrix dimension maps to x and the second to y in the rendered surface.

Written by the indexing model from the issue text.

Description

For example:

plot_ly(z = ~volcano, type = "surface")

Obviously, the 1st dimension of matrix volcano is interpreted as the 'y', while the 2nd dimension as the 'x'.

However, a more natural order is: 1st dimension of matrix to be 'x', while the 2nd dimension to be 'y'. Such interpretation is in other R packages such as MASS: the function kde2d() will returns x, y and z matrix, where the dim1 and 2 of z is x and y respectively.

Dominant language
R
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