Scilab 5.5.2
Change language to:
English - Français - Português - Русский

Please note that the recommended version of Scilab is 2024.1.0. This page might be outdated.
See the recommended documentation of this function

# czt

チャープz変換アルゴリズム

### 呼び出し手順

`[czx]=czt(x,m,w,phi,a,theta)`

### 引数

x

m

cztはz平面の`m` 個の点で評価されます

w

phi

a

theta

czx

チャープz変換出力

### 説明

`k=0,1,...,m-1`として 点`[a*exp(j*theta)][w^kexp(j*k*phi)]`における z平面の螺旋上でz変換を計算するチャープz変換アルゴリズム.

### 例

```a=.7*exp(%i*%pi/6);
[ffr,bds]=xgetech(); //カレントのコンテキストを保存
rect=[-1.2,-1.2*sqrt(2),1.2,1.2*sqrt(2)];
t=2*%pi*(0:179)/179;xsetech([0,0,0.5,1]);
plot2d(sin(t)',cos(t)',[2],"012",' ',rect)
plot2d([0 real(a)]',[0 imag(a)]',[3],"000")
xsegs([-1.0,0;1.0,0],[0,-1.0;0,1.0])
w0=.93*exp(-%i*%pi/15);w=exp(-(0:9)*log(w0));z=a*w;
zr=real(z);zi=imag(z);
plot2d(zr',zi',[5],"000")
xsetech([0.5,0,0.5,1]);
plot2d(sin(t)',cos(t)',[2],"012",' ',rect)
plot2d([0 real(a)]',[0 imag(a)]',[-1],"000")
xsegs([-1.0,0;1.0,0],[0,-1.0;0,1.0])
w0=w0/(.93*.93);w=exp(-(0:9)*log(w0));z=a*w;
zr=real(z);zi=imag(z);
plot2d(zr',zi',[5],"000")
xsetech(ffr,bds); //コンテキストを回復```
 Report an issue << cspect spectral_estimation intdec >>

 Copyright (c) 2022-2024 (Dassault Systèmes)Copyright (c) 2017-2022 (ESI Group)Copyright (c) 2011-2017 (Scilab Enterprises)Copyright (c) 1989-2012 (INRIA)Copyright (c) 1989-2007 (ENPC)with contributors Last updated:Wed Apr 01 10:25:01 CEST 2015