Names 2d coordinates of Row/Col are misleading. X, Y instead of Y, X

[walldiss]

n the GetCell/SetCell functions, the input coordinates are reversed. For example, in the code here, the row is accessed using the X coordinate and the column with the Y coordinate. Traditionally, the X axis refers to the horizontal axis and the Y axis to the vertical. Therefore, the row index should be identified by Y, and the column index by X. This inconsistency also appears in other functions like col, getColRoot, colSlice, etc.

Example:

func (ds *dataSquare) rowSlice(x uint, y uint, length uint) [][]byte {
	return ds.squareRow[x][y : y+length]
}

Perhaps we should swap the use of X and Y coordinates in these functions and in other similar functions.

[rootulp]

Alternatively we can replace all usages of x and y with the more explicit row and col.

[walldiss]

The problem with row and col are usually used for variable pointing to axis slice itself. So it rather needs to be rowIdx and colIdx, which not so nice

[rootulp]

I'm fine with either: rowIdx/colIdx or fixing x/y