Combining multiple plots in 1 graph

Question

Qatrisyia Zamzuri 2019-5-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/463584-combining-multiple-plots-in-1-graph

编辑： madhan ravi 2019-5-23

clc;
close all;
clear all;
echo on;
 
a=1;
b=3;         %resolution of 3
f=1;         %frequency of analog signal
fs=10;       %sampling frequency
t=0:1/fs:10; %time axis
x=a*sin(t) + (a/2)*cos(2*t); %sin and cosine wave
subplot(3,1,1);plot(t,x);grid
 
Nsamples=length(x); %sample number
q_out=zeros(1,Nsamples); %making an array of size=number of samples
%midrise
del=2*a/(2^b); %determining the step size
Ll=-a+del/2;
Lh=a-del/2;
for i=Ll:del:Lh    
    for j=1:Nsamples %taking the whole sampled vector
        if(((i-del/2)<x(j))&&(x(j)<(i+del/2)))
            q_out(j)=i;            
        end
    end
end
subplot(3,1,2);plot(t,q_out);grid %plotting wave forms.

Here's my code, how do I plot them on the same graph? I have tried it before but it seems that it does not work.

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Qatrisyia Zamzuri 2019-5-23

How do I plot the original signal and it's two quantized versions in the same graph?

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Answer 1

madhan ravi 2019-5-23

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/463584-combining-multiple-plots-in-1-graph#answer_376265

编辑：madhan ravi 2019-5-23

Read this once again:

Use hold on after the first plot() call and indeed remove subplot()

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Qatrisyia Zamzuri 2019-5-23

Sorry, here's my code

clc;

close all;

clear all;

echo on;

a=1;

b=3; %resolution of 3

f=1; %frequency of analog signal

fs=10; %sampling frequency

t=0:1/fs:10; %time axis

x=a*sin(t) + (a/2)*cos(2*t); %sin and cosine wave

%subplot(3,1,1);plot(t,x);grid

Nsamples=length(x); %sample number

q_out8=zeros(1,Nsamples);

q_out16=zeros(1,Nsamples);%making an array of size=number of samples

%midrise

del=2*a/(2^b); %determining the step size

Ll=-a+del/2;

Lh=a-del/2;

for i=Ll:del:Lh

for j=1:Nsamples %taking the whole sampled vector

if(((i-del/2)<x(j))&&(x(j)<(i+del/2)))

q_out8(j)=i;

q_out16(j)=i;

end

subplot(3,1,2);plot(t,x,'r',t,q_out8,'k',t,q_out16,'m');grid %plotting wave forms.

Qatrisyia Zamzuri 2019-5-23

在 MATLAB Online 中打开

clc;
close all;
clear all;
echo on;
a=1;
b=3;         %resolution of 3
f=1;         %frequency of analog signal
fs=10;       %sampling frequency
t=0:1/fs:10; %time axis
x=a*sin(t) + (a/2)*cos(2*t); %sin and cosine wave
plot(t,x);grid
hold on
Nsamples=length(x); %sample number
q_out8=zeros(1,Nsamples);
q_out16=zeros(1,Nsamples);%making an array of size=number of samples
%midrise
del=2*a/(2^b); %determining the step size
Ll=-a+del/2;
Lh=a-del/2;
for i=Ll:del:Lh
for j=1:Nsamples %taking the whole sampled vector
if(((i-del/2)<x(j))&&(x(j)<(i+del/2)))
q_out8(j)=i;
q_out16(j)=i;
  
end   
end   
end
plot(t,x,'r',t,q_out8,'k',t,q_out16,'m');grid %plotting wave forms.