回复：【求助集中贴10】求助集中处理帖

新手求助，用matlab来改进hilbert算法，下面是源程序：
function testhilbert()%t = linspace(0,10*pi,1024);
data = sin(t)+cos(5*t)+sin(t/2.0);figure(1);plot(t,data);hdata = hilbert(data);
a = (hdata.*conj(hdata)).^(0.5);p = angle(hdata);f = diff(p);
%figure(1);plot(t,real(a));figure(2);plot(t,p);figure(3);plot(t(1:length(f)),f);
fid = fopen('c:\\data\\fivtanks.dzt','rb')datagpr = fread(fid,[512,400],'uint8');
fclose(fid);
figure(10);imagesc(datagpr);
hdata = hilbert(datagpr);
a = (hdata.*conj(hdata)).^(0.5);p = angle(hdata);f = diff(p);figure(11);imagesc(real(a));figure(12);imagesc(p);figure(13);imagesc(f);

function testhilbert()
%
t = linspace(0,10*pi,1024);
data = sin(t)+cos(5*t)+sin(t/2.0);
figure(1);
plot(t,data);hdata = hilbert(data);
a = (hdata.*conj(hdata)).^(0.5);
p = angle(hdata);
f = diff(p);
%
figure(1);
plot(t,real(a));
figure(2);
plot(t,p);
figure(3);
plot(t(1:length(f)),f);
fid = fopen('c:\\data\\fivtanks.dzt','rb')
datagpr = fread(fid,[512,400],'uint8');
fclose(fid);
figure(10);
imagesc(datagpr);
hdata = hilbert(datagpr);
a = (hdata.*conj(hdata)).^(0.5);
p = angle(hdata);
f = diff(p);
figure(11);
imagesc(real(a));
figure(12);
imagesc(p);
figure(13);
imagesc(f);

用Matlab实现对26个英文字母有噪情况下的识别。谁会呀谁会呀

如何用matlab求borda数~万分感谢~~~~

nuWp=[1 80000 100000000];
dnWp=[1 70000 25000];
gainWp=0.0001;
Wp=nd2sys(nuWp,dnWp,gainWp);
nuWu=[0.385 1 1];
dnWu=[0.0001 0.002 1];
gainWu=1000000;
Wu=nd2sys(nuWu,dnWu,gainWu);
nuM=[1];
dnM=[0.00000000375 0.00012 1];
M=nd2sys(nuM,dnM);
nuWn=[0.1 1];
dnWn=[0.001 1];
gainWn=0.0006;
Wn=nd2sys(nuWn,dnWn,gainWn);
systemnames='G Wp Wu Wn M';
>> inputvat='[pert{15};dist;control;ref;noise]';
>> outputvar='[G(1:15);Wp;-Wu;ref+G(16)-Wn;M;Wn]';
>> input_to_G='[pert;dist+control]';
>> input_to_Wp='[-G(16)+M]';
>> input_to_Wu='[control]';
>> input_to_M='[ref]';
>> input_to_Wn='[noise]';
>> sysoutname='sys_ic';
>> cleanupsysic='yes';
>> sysic;
??? Error using ==> sysic at 128
Invalid Outputvar
请问我要怎么改就不会报错了

有两个长度相等行向量a,b。求他们在同一位置相等的元素，输出该元素和它的位置，如果没有，输出a从右向左的第一个不为零的元素和它的位置。好像循环可以做，但是我编不出来，可以给一下程序吗？

求助
volts=120;rs=50; rl=1:1:100; amps=volts./(rs+rl); pl=(amps.^2).*rl; plot(rl,pl); grid on
初学者 我想知道 像volts amps 后面加的点是什么意思 去点后提示??? Error using ==> mrdivideMatrix dimensions must agree.

怎么将视频按照时间分成几个区域，之后再从某个时间区域里面对视频取一帧？@dn1630 吧主和各位大神求救啊......