f_drawfilt.asv

DSP程序 Matlab是一套用于科学工程计算的可视化高性能语言与软件环境。它集数值分析、矩阵运算、信号处理和图形显示于一体

function [pos,colors,h] = f_drawfilt

%F_DRAWFILT: Draw a block diagram for GUI module g_filters
%
% Usage:   [pos,colors,h] = f_drawfilt;
%
% Outputs: pos    = position of axes for block diagram
%          h      = axis handle
%          colors = array of plotting colors 
 
% Draw block diagram

h = subplot(2,1,1);
cla
colors = get(gca,'ColorOrder');
pos = get(gca,'Position');
hold on
t1 = text (12,50,'x(k)');
set(t1,'Color',colors(1,:))
f_circle (20,50,2,colors(1,:));
f_vector (21,50,1,0,9,colors(1,:))
f_block (30,40,20,20,colors(2,:))
text (40,50,'H(z)','HorizontalAlignment','center','Color',colors(2,:))
f_line (50,50,1,0,9,colors(1,:))
f_circle (60,50,2,colors(1,:));
t2 = text (62,50,'y(k)');
set(t2,'Color',colors(1,:))
axis([0 170 0 60])
axis off
 

function f_drawfilt (h,colors)

%F_DRAWFILT: Draw a block diagram for GUI module g_filt3ersspectra
%
% Usage: f_drawspec (h,colors);
%
% Input: 
%        h      = axes handle
%        colors = array of plotting colors
 
% Initialize

ylim = get(h,'Ylim');
xlim = get(h,'Xlim');
y0 = (ylim(2)-ylim(1))/2;
axes (h);
hold on
arrow = 0.1;
boxwidth = 0.2;
boxheight = 0.2;
circle = 0.02;

% Draw block diagram

f_circle (0.5-arrow-0.5*boxwidth,y0,circle,colors(1,:));
text (0.5-arrow-0.5*boxwidth-0.04,y0,'x(k)','Color',colors(1,:),'HorizontalAlignment','center');
f_vector (0.5-arrow-0.5*boxwidth+0.5*circle,y0,1,0,arrow-0.5*circle,colors(1,:))
f_block (0.5-0.5*boxwidth,y0-0.5*boxheight,boxwidth,boxheight,colors(2,:))
text (0.5,y0,'DFT','HorizontalAlignment','center')
f_line (0.5+0.5*boxwidth,y0,1,0,arrow-0.5*circle,colors(3,:))
f_circle (0.5+0.5*boxwidth+arrow,y0,circle,colors(3,:))
text (0.5+0.5*boxwidth+arrow+0.04,y0,'y(k)','Color',colors(3,:),'HorizontalAlignment','center');