Limits must be a 2-element vector of increasing durations.

%% question1 part(a)
load handel.mat

filename = 'handel.wav';
audiowrite('handel.wav',y,Fs)
clear y Fs

info = audioinfo('handel.wav')
[y,Fs] = audioread('handel.wav');
%sound(y,Fs);

t = 0:seconds(1/Fs):seconds(info.Duration);
t = t(1:end-1);

plot(t,y)
xlabel('Time-sec')
ylabel('Amplitude')

%% question1 part(b)
amplitudes = abs(y);   % abs(a) is the amplitudes in an all-positive sense
mp = max(abs(y));        % max  is the highest amplitude.
L=8;

dyn_range_of_interval = 2*mp/L;
thresholds 	=  linspace(-(mp-dyn_range_of_interval),(mp-dyn_range_of_interval),L-1);
Temp_vector = [-mp  thresholds  mp]; 
for  k=1:length(Temp_vector)-1
codebook(k) = (Temp_vector(k)+Temp_vector(k+1))/2; end

[index,quants] = quantiz(y,thresholds,codebook);
plot(t,y,'x',t,quants,'.')
legend('Original signal','Quantized signal');
xlim([0.2 0.4])

[Abdur Raziq khan]

I want to plot handel.mat and quantized signal on same plot from t=0.2sec to t=0.4sec but i'm gonna getting this error ? How can I solve this issue?

[Abdur Raziq khan]

Error using xlim (line 31)

Limits must be a 2-element vector of increasing durations.

Error in task1 (line 33)

xlim([0.2 0.4])

[Abdur Raziq khan]

I take two element vector of increaning duration but gives me error?

Answer 1

[Cris LaPierre]

You are plotting a variable of data type duration as x. Therefore, your axis is made up of durtions. The xlim values you use must also be of datatype duration. You use seconds to create t, so do the same for xlim.

%% question1 part(a)
load handel.mat

t = 0:seconds(1/Fs):seconds(length(y)/Fs);
t = t(1:end-1);

plot(t,y)
xlabel('Time-sec')
ylabel('Amplitude')

%% question1 part(b)
amplitudes = abs(y);   % abs(a) is the amplitudes in an all-positive sense
mp = max(abs(y));        % max  is the highest amplitude.
L=8;

dyn_range_of_interval = 2*mp/L;
thresholds 	=  linspace(-(mp-dyn_range_of_interval),(mp-dyn_range_of_interval),L-1);
Temp_vector = [-mp  thresholds  mp]; 
for  k=1:length(Temp_vector)-1
    codebook(k) = (Temp_vector(k)+Temp_vector(k+1))/2; 
end

[index,quants] = quantiz(y,thresholds,codebook);
plot(t,y,'x',t,quants,'.')
legend('Original signal','Quantized signal');
xlim(seconds([0.2 0.4]))

[rajshri simhadri]

how to add a noise signal to this orginal signal?

[Cris LaPierre]

Create a noise signal the same length as the original signal, and then add the two together.

[Kosta Manser]

I have been trying to use the xlim(seconds([start end])) in a subplot but it does not wok in that scenario. The xlimits are not enforced and no error is given.

[Cris LaPierre]

There must be some details missing. Is your xdata of data type duration? What code follows your xlim code?