%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%?Figure?2.15?&?2.16
%?Beampattern?of?uniformly?weighted?linear?array
%?Xiaomin?Lu
%?Updated?1/5/99
%?Last?updated??by?K.?Bell?7/22/01?10/4/01
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

clear?all
close?all

N?=?11;				%?11?elements
%?Note?Eq.?（2.92）?is?in?fact?the?standard?Dirichlet?function
%?beam?=?diric（psi?N）;
%?if?you?don‘t?have?the?signal?processing?toolbox?this?does?the?same?thing
psi?=?（-5:1/400:5）*pi;
beam?=?zeros（1length（psi（:）））;
y=sin（.5*psi）;
i=find（abs（y）>1e-12）;????????????%?set?where?x?is?not?divisible?by?2?pi
j=1:length（psi（:））;
j（i）=[];?????????????????????????%?complement?set
beam（i）=sin（（N/2）*psi（i））./（N*y（i））;
beam（j）=sign（cos（psi（j）*（（N+1）/2）））;

plot（psi/pi?beam）
grid
xlabel（‘{\it?\psi}/\pi‘‘Fontsize‘14）
ylabel（‘Frequency?wavenumber?response?function‘‘Fontsize‘14）
axis（[-5?5?-0.4?1]）

figure
beam?=?20*log10（abs（beam））;
plot（psi/pibeam）;
xlabel（‘{\it\psi/}\pi‘‘Fontsize‘14）
ylabel（‘Frequency?wavenumber?response?function?（dB）‘‘Fontsize‘14）
axis（[-5?5?-25?0]）
grid

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2017-09-29?15:36??最優陣列\
?????目錄???????????0??2017-09-29?15:36??最優陣列\Figures?Chap?2-7\
?????目錄???????????0??2017-09-29?10:58??最優陣列\Figures?Chap?2-7\Ch2\
?????文件????????1076??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch2\fig2_1516.m
?????文件?????????757??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch2\fig2_17.m
?????文件????????2471??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch2\fig2_18.m
?????文件????????2598??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch2\fig2_19.m
?????文件?????????910??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch2\fig2_20.m
?????文件?????????757??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch2\fig2_22.m
?????文件?????????568??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch2\fig2_23.m
?????文件????????1649??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch2\fig2_24.m
?????文件?????????558??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch2\fig2_26.m
?????文件?????????499??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch2\fig2_29.m
?????文件????????4910??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch2\polardb.m
?????文件?????????259??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch2\sinc.m
?????目錄???????????0??2017-09-29?10:58??最優陣列\Figures?Chap?2-7\Ch3\
?????文件?????????385??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch3\cheby.m
?????文件?????????392??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch3\DPSS.m
?????文件?????????952??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch3\fig3_01.m
?????文件????????1039??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch3\fig3_02.m
?????文件????????1091??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch3\fig3_03.m
?????文件????????1239??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch3\fig3_04.m
?????文件????????2629??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch3\fig3_05_06_13.m
?????文件????????1477??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch3\fig3_07.m
?????文件????????1246??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch3\fig3_08.m
?????文件?????????569??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch3\fig3_10.m
?????文件????????1347??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch3\fig3_11.m
?????文件????????1253??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch3\fig3_12.m
?????文件????????1494??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch3\fig3_17_18.m
?????文件????????2617??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch3\fig3_19_20.m
?????文件????????2950??2009-03-19?02:51??最優陣列\Figures?Chap?2-7\Ch3\fig3_21.m
............此處省略298個文件信息