Array layout

[daniellga]

Hi! I got the array below with a layout CFcf. What does that mean? Is there a place where this is documented?

[[0.0, 0.0, 0.0, 0.0, 0.0, ..., -9.1552734375e-5, -6.103515625e-5, -3.0517578125e-5, 0.0, 3.0517578125e-5]], shape=[1, 294909], strides=[294909, 1], layout=CFcf (0xf), const ndim=2

[jturner314]

The string describing the layout in the debug format is effectively an internal implementation detail and may change, so it's not documented. The shape and strides fully describe the layout. The layout string is generated when formatting the array, based on the shape and strides. To answer your question, though, the C, F, c, and f are flags describing the shape and strides.

• A capital C means that the layout can be interpreted as being in C standard layout.
• A capital F means that the layout can be interpreted as being in Fortran layout.
• A lowercase c means that iteration prefers C order.
• A lowercase f means that iteration prefers Fortran order.

[daniellga]

Thanks for the detailed info!