MATLAB POLYSPACE RELEASE NOTES Instrukcja Użytkownika Pobierz pdf (Strona 35)

Expressions

Complex conjugate transpose

()

Specify evaluation order

Functions

MATLAB provides a large number of standard elementary mathematical

functions, including

abs, sqrt, exp ,andsin. Taking the square root or

logarithm of a negative number is not an error; the appropriate complex result

is produced automatically. MATLAB also provides many more advanced

mathematical functions, including Bessel and gamma functions. Most of

these functions accept complex arguments. For a list of the elementary

mathematical functions, type

help elfun

For a list of more advanced mathematical and matrix functions, type

help specfun

help elmat

Some of the functions, like sqrt and si n,arebuilt in. Built-in functions are

part of the MATLAB core so they are very efficient, but the computational

details are not readily accessible. Other functions, like

gamma and sinh,are

implemented in M-files.

There are some differences between built-in functions and other functions. For

example, for built-in functions, you cannot see the code. For other functions,

you can see the code and e ven modify it if you want.

Several special functions provide values of useful constants.

3.14159265...

Imaginary unit,

Same as i

eps

Floating-

point relative precision,

realmin

Smallest floating-point number,

2-13

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 239 240

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MATLAB POLYSPACE RELEASE NOTES Instrukcja Użytkownika Strona 35