ToDo.md

• copy to buffer if non-contiguous.gc

• contract contiguous dimesions.gc

• transpose and flatten reduce dimeinsion to last user dimension. -- almost done.

• NArray with 1-d index and md-shape??

• enable a[a.sort_index] == a.sort for multi-dimensional array -- perhaps done.

• specify Input/Overwrite array -- already has OVERWRITE

• accept int-array as index argument of aref.gc

• convert binary from/to Stringgc

• Complex#seq allows complex stepgc

• Frozen array -- checking OBJ_FROZEN.

• Marshaling -- perhaps done except Bit, Struct.

• inspect Enumerable#step objectgc

• contiguous checkgc

• propagate_nan for min,max,sum,...gc

• parsing keyword arguments -- use ruby api.

• use erbpp2gc

• switch to TypedData.gc

• how to get the element size value effectivelygc

• introduce keyword :keepdims (keep dimension/axis) for reduce_dimension.gc

• refactoring array.c: avoid using na_compose_t and na_ary_composition.gc

• reshape!gc

• flatten_dim

• name of new_zeros, zeros_like etc.

• NMath.sin => DFloat.sin ??

• contiguous if na_view->stridx == NULL ?

• store_binary with bite_swap.

• write barrier?

• move "reduce" field from RNArray to RNArrayView?

• unify RNArrayBase and RNArrayView structure??

• Thread-locked array??

• use rb_thread_call_without_gvl??

• alignment

• force buffering option

• update MT Random Number Generator

• GVL release

• Ctrl-C stop during method

• floor method should be same as Ruby floor or C99 floor ??

constants

• NAN
• INF
• EPS

Matlab method

• logspace
• meshgrid
• rot90
• rad2deg
• deg2rad
• expm1
• histcount

from numpy

• <<,>>
• swapaxis
• squeeze
• trace
• ptp
• clip
• ravel
• take
• put
• choose choise
• select
• partition
• searchsorted / bsearch
• compress
• pad
• tile
• copysign
• bincount
• unique
• roll
• repeat
• logical_and/or/not - Bit & | ^
• minimum,maximum
• shuffle
• interp
• intersect1d
• asarray - cast
• persentile

Math

• csc,sec,cot
• csch,sech,coth
• acsc,asec,acot
• acsch,asech,acoth