MATLAB COMPILER RELEASE NOTES Guia do Utilizador descarregar pdf (Página 203)

100

101

Mathematics

6-13

Mathematics

Performance improvements and multithreading for airy, psi, and

Bessel functions

The following functions show improved performance: besselh, besseli, besselj, besselk,

bessely, airy, and psi.

ddensd function that solves delay differential equations of neutral type

with state-dependent delays

The ddensd function solves neutral delay differential equations that involve both the

solution and its first derivative evaluated in the past:

y '(t) = f(t, y(t), y(dy

),...,y(dy

), y '(dyp

),...,y '(dyp

))

The delays, dy and dyp, can be time-dependent, state-dependent, or both.

Signed integer support for bit-wise operations

The bitand, bitor, bitxor, bitcmp, bitshift, bitget, and bitset, functions now support signed

integers.

An additional input argument, assumedtype, is an optional string argument you can

pass to any of these functions. Use assumedtype to indicate the assumed integer class

for input values of type double. For example, bitor(14,240,'uint8') treats 14 and

240 as unsigned 8-bit integers even though they are passed as integers of type double.

assumedtype can be one of the following strings: 'int8', 'uint8', 'int16',

'uint16', 'int32', 'uint32', 'int64', or 'uint64'. The default value of

assumedtype is 'uint64' for input values of type double. If the input values belong to

an integer class, assumedtype defaults to the class of the input values.

atan2d function that calculates four-quadrant inverse tangent with result

in degrees

atan2d calculates the four-quadrant inverse tangent and returns angles in degrees that

lie in the closed interval [–180,180].

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