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Axis swap

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+

New in version 5.0.0.

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+

Change the order and sign of 2,3 or 4 axes.

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Alias

axisswap

Domain

2D, 3D or 4D

Input type

Any

Output type

Any

+

Each of the possible four axes are numbered with 1–4, such that the first input axis +is 1, the second is 2 and so on. The output ordering is controlled by a list of the +input axes re-ordered to the new mapping.

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+

Usage

+

Reversing the order of the axes:

+
+proj=axisswap +order=4,3,2,1
+
+
+

Swapping the first two axes (x and y):

+
+proj=axisswap +order=2,1,3,4
+
+
+

The direction, or sign, of an axis can be changed by adding a minus in +front of the axis-number:

+
+proj=axisswap +order=1,-2,3,4
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+
+

It is only necessary to specify the axes that are affected by the swap +operation:

+
+proj=axisswap +order=2,1
+
+
+
+
+

Parameters

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++order=<list>
+

Ordered comma-separated list of axis, e.g. +order=2,1,3,4. +Adding a minus in front of an axis number results in a change of direction +for that axis, e.g. southward instead of northward.

+

Required.

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