SWITCH expression must be a scalar or string constant 出错请教
我编了一个滤波器的程序,出现下列问题,请各位帮忙改改!谢谢!程序:
clear;
clc;
close all hidden;
fni=input('wenjian:','s');
fid=fopen(fni,'r');
fs=fscanf(fid,'%f',1);
fun=fscanf(fid,'%d',3);
mod=fscanf(fid,'%d',1);
if fun<=2
wp=fscanf(fid,'%f',1);
ws=fscanf(fid,'%f',1);
else
wp=fscanf(fid,'%f',2);
ws=fscanf(fid,'%f',2);
end
rp=fscanf(fid,'%f',1);
rs=fscanf(fid,'%f',1);
fno=fscanf(fid,'%s',1);
x=fscanf(fid,'%f',);
status=fclose(fid);
switch fun
case 1
ft='low';
case 2
ft='high';
case 3
ft='bandpass';
case 4
ft='stop';
otherwise
ft='low';
end
switch mod
case 1
=buttord(wp/(fs/2),ws/(fs/2),rp,rs);
=butter(n,wn,ft);
case 2
=cheb1ord(wp/(fs/2),ws/(fs/2),rp,rs);
=cheby1(n,rp,wn,ft);
case 3
=cheb2ord(wp/(fs/2),ws/(fs/2),rp,rs);
=cheby2(n,rs,wn,ft);
case 4
=ellipbuttord(wp/(fs/2),ws/(fs/2),rp,rs);
=ellip(n,rp,rs,wn,ft);
end
出现的问题:
??? SWITCH expression must be a scalar or string constant.
Error in ==> filterwo2 at 33
switch mod
谢谢各位!
[ 本帖最后由 eight 于 2007-9-15 10:25 编辑 ]
回复 #1 jingrenzhi 的帖子
这是不是王济那本书上的程序？回复 #2 zhangnan3509 的帖子
不知道,是朋友给的!回复 #2 zhangnan3509 的帖子
有啥问题吗?我也没有看明白!是同学的! 能不能把你要导入的文件也附上来啊~~~回复 #5 zhj0231984 的帖子
你好,我想问的是设计带通滤波器,频率需要设置成二元向量,在matlab程序中怎么设置?我不会用附件形式传上来!你帮忙看一下!我的数据是
"3.438134e-02
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1.639001e-02
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1.789714e-02
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1.309317e-02
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5.651727e-03
-3.767818e-04" 从程序和数据来看，是楼主给出的数据格式和程序不配。在程序中要从数据文件读入：
fni=input('wenjian:','s');
fid=fopen(fni,'r');
fs=fscanf(fid,'%f',1);
fun=fscanf(fid,'%d',3);
mod=fscanf(fid,'%d',1);
if fun<=2
wp=fscanf(fid,'%f',1);
ws=fscanf(fid,'%f',1);
else
wp=fscanf(fid,'%f',2);
ws=fscanf(fid,'%f',2);
end
rp=fscanf(fid,'%f',1);
rs=fscanf(fid,'%f',1);
fno=fscanf(fid,'%s',1);
x=fscanf(fid,'%f',);
fs, fun, mod, wp,ws, rp, rs, fno和x，但楼主的数据文件只给出x的数据。 发这么长的数据 好像水贴一样
呵呵 飘过 原帖由 jingrenzhi 于 2007-9-14 15:53 发表 http://www.chinavib.com/forum/images/common/back.gif
我编了一个滤波器的程序,出现下列问题,请各位帮忙改改!谢谢!
程序:
clear;
clc;
close all hidden;
fni=input('wenjian:','s');
fid=fopen(fni,'r');
fs=fscanf(fid,'%f',1);
fun=fscanf(fid,'%d' ...
先看看 switch 函数的用法，然后自己设置断点调试一下
ps：下次贴数据请使用附件，这样直接贴上来阅读不方便
回复 #7 songzy41 的帖子
谢谢,我也是刚开始学习matlab,很多地方不懂,以后多指教!:@)回复 #7 songzy41 的帖子
你好,我想问的是设计带通滤波器,频率需要设置成二元向量,在matlab程序中怎么设置?回复 #2 zhangnan3509 的帖子
你好!你说的"王济的书"是本啥样的书?书名是啥?
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