Programmer Guide/Command Reference/EVAL/complex arithmetic: Difference between revisions
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* If a numerical object containing '''N x M''' complex numbers, is converted element-wise to real numbers, the resulting object consists of N rows and M columns. | * If a numerical object containing '''N x M''' complex numbers, is converted element-wise to real numbers, the resulting object consists of N rows and M columns. | ||
===complex -> complex=== | |||
{|class="einrahmen | |||
!argument ''x'' || any complex type | |||
!result ''r'' || same complex type as ''x'' | |||
|} | |||
;Usage: '''<code>cp2r(<var>xc</var>)</code>''' ... convert from polar to cartesian format | |||
:;<var>xc</var>: a complex scalar, vector or matrix in cartesian format (real part, imaginary part) | :;<var>xc</var>: a complex scalar, vector or matrix in cartesian format (real part, imaginary part) | ||
;Result: same type as ''xc'', but the complex numbers are stored in the polar format (length, phase) | ;Result: same type as ''xc'', but the complex numbers are stored in the polar format (length, phase) | ||
Revision as of 11:30, 7 April 2011
Because the current version of the STx EVAL command do not support a complex data type, a package of functions is used to implement arithmetic and special handling for complex numbers.
Note:
- A numerical object containing N x M complex numbers (N>=1, M>=1), consists of 2N rows and M columns, because each complex number uses two cells of a row.
- If a numerical object containing N x M complex numbers, is converted element-wise to real numbers, the resulting object consists of N rows and M columns.
complex -> complex
| argument x | any complex type | result r | same complex type as x |
|---|
- Usage
cp2r(xc)... convert from polar to cartesian format- xc
- a complex scalar, vector or matrix in cartesian format (real part, imaginary part)
- Result
- same type as xc, but the complex numbers are stored in the polar format (length, phase)
- Usage
cp2r(xc)... convert from polar to cartesian format- xc
- a complex scalar, vector or matrix in polar format (length, phase)
- Result
- same type as xc, but the complex numbers are stored in the cartesian format (real part, imaginary part)
- Usage
cr2len(xc)... convert cartesian format to length (amplitude)- xc
- a complex scalar, vector or matrix in polar format (length, phase)
- Result
- same type as xc, but the complex numbers are stored in the cartesian format (real part, imaginary part)
r with same length as x containing the converted window function
cr2p
Convert Cartesian coordinates to Polar coordinates
Usage:
cr2p(xC)
Return Type:
like xC
complex numbers
