Why this error is occured?
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>> a=imread('test.png');
>> imshow(a)
??? Attempt to call constructor image with incorrect letter case.
Error in ==> basicImageDisplay at 9 hh = image(xdata,ydata,cdata, ...
Error in ==> imshow at 246 hh = basicImageDisplay(fig_handle,ax_handle,...
>>
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mandakini behera
2019년 1월 17일
%this file remove noise from signal using filter
%%simulate noisy signal
Fs = 500;
f = 20;
n = [1/Fs:1/Fs:1];
x = sin(2*pi*f*n);
%add noise to the signal
y = x + rand(1,length(x));
%plot the noisy signal
subplot(3,4,1);plot(n,y);
title('noisy signal');
xlabel('time(s)');
ylabel('amplitude');
%spectral analysis of the signal
L = length(y);
NFFT = 2^nextpow2(L);
y_fft = abs(fft(y,NFFT));
%creating frequency axis
freq = Fs/2*linspace(0,1,NFFT/2+1);
%plot sigle sided amplitude spectrum
subplot(3,4,2);
plot(freq,y_fft(1:NFFT/2+1));
title('single-sided amplitude spectum of y(t)');
xlabel('frequency(Hz)');
ylabel('|y(f)|');
%%design filter and apply on the sequence.
o = 5;
wn = [3 7]*2/Fs;
[b,a] = butter(o,wn,'bandpass');
%see frequency response of the filter
[h,w] = freqz(b,a,1024,Fs);
subplot(3,4,3);
plot(w,20*log10(abs(h)));
title('magnitude response of the filter');
xlabel('frequency(Hz)');
ylabel('magnitude');grid on;
%filter the signal
y_filt = filter(b,a,y);
subplot(3,4,4);
plot(n,y_filt);
title('filtered signal');
xlabel('time(s)');
ylabel('amplitude');
By Executing this programe the error occurs like the following.how can it will be error free and give output ,kindly suggest me.
removenoise
Error using subplot (line 109)
Attempt to call constructor handle with incorrect letter case.
Error in removenoise (line 10)
subplot(3,4,1);plot(n,y);
채택된 답변
Walter Roberson
2014년 1월 23일
Somewhere in your MATLAB path, you have your own routine that has the same name as one of the internal MATLAB graphic routines.
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추가 답변 (1개)
Tesfatsiyon Mehale
2018년 12월 3일
In current folder path on Matlab that mean your default matlab file save path and check the file name image.m and remove it . after that it will be working .
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