How to combine multiple plots using subplot

Question

ethan watts on 26 Apr 2022

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Answered: Johannes Hougaard on 27 Apr 2022

I'm new to matlab and am having showing all 16 graphs only a few to be showing up. The current code is:

clear
clc
N = 256;
n = 0:N-1;
x0000 = [ones(16,1); zeros(240,1)];
x0000 = x0000/norm(x0000);
x0001 = [zeros(16,1); ones(16,1); zeros(224,1)];
norm(x0001);
x0001 = x0001/norm(x0001);
x0010 = [zeros(32,1); ones(16,1); zeros(208,1)];
norm(x0010);
x0010 = x0010/norm(x0010);
x0011 = [zeros(48,1);ones(16,1); zeros(192,1)];
norm(x0011);
x0011 = x0011/norm(x0011);
x0100 = [zeros(64,1);ones(16,1); zeros(176,1)];
norm(x0100);
x0100 = x0100/norm(x0100);
x0101 = [zeros(80,1); ones(16,1); zeros(160,1)];
norm(x0101);
x0101 = x0101/norm(x0101);
x0110 = [zeros(96,1); ones(16,1); zeros(144,1)];
norm(x0110);
x0110 = x0110/norm(x0110);
x0111 = [zeros(112,1); ones(16,1); zeros(128,1)];
norm(x0111);
x0111 = x0111/norm(x0111);
x1000 = [zeros(128,1); ones(16,1); zeros(112,1)];
norm(x1000);
x1000 = x1000/norm(x1000);
x1001 = [zeros(144,1); ones(16,1); zeros(96,1)];
norm(x1001);
x1001 = x1001/norm(x1001);
x1010 = [zeros(160,1); ones(16,1); zeros(80,1)];
norm(x1010);
x1010 = x1010/norm(x1010);
x1011 = [zeros(176,1); ones(16,1); zeros(64,1)];
norm(x1011);
x1011 = x1011/norm(x1011);
x1100 = [zeros(192,1); ones(16,1); zeros(48,1)];
norm(x1100);
x1100 = x1100/norm(x1100);
x1101 = [zeros(208,1); ones(16,1); zeros(32,1)];
norm(x1101);
x1101 = x1101/norm(x1101);
x1110 = [zeros(224,1); ones(16,1); zeros(16,1)];
norm(x1110);
x1110 = x1110/norm(x1110);
x1111 = [zeros(240,1); ones(16,1)];
norm(x1111);
x1111 = x1111/norm(x1111);
signals=[x0000,x0001,x0010,x0011,x0100,x0101,x0110,x0111,x1000,x1001,x1010,x1011,x1100,x1101,x1110,x1111];
subplot(911);
stem(n,x0000, 'b','Marker','none','LineWidth',1)
title('Signal x0000 - Transmit to send a digital 0000','fontSize',18)
subplot(912);
stem(n,x0001, 'r','Marker','none','LineWidth',1)
title('Signal x0001 - Transmit to send a digital 0001','fontSize',18)
subplot(913);
stem(n,x0010, 'r','Marker','none','LineWidth',1)
title('Signal x0010 - Transmit to send a digital 0010','fontSize',18)
subplot(914);
stem(n,x0011, 'r','Marker','none','LineWidth',1)
title('Signal x11 - Transmit to send a digital 0011','fontSize',18)
subplot(915);
stem(n,x0100, 'r','Marker','none','LineWidth',1)
title('Signal x11 - Transmit to send a digital 0100','fontSize',18)
subplot(916);
stem(n,x0101, 'r','Marker','none','LineWidth',1)
title('Signal x11 - Transmit to send a digital 0101','fontSize',18)
subplot(917);
stem(n,x0110, 'r','Marker','none','LineWidth',1)
title('Signal x11 - Transmit to send a digital 0110','fontSize',18)
subplot(918);
stem(n,x0111, 'r','Marker','none','LineWidth',1)
title('Signal x11 - Transmit to send a digital 0111','fontSize',18)
subplot(919);
stem(n,x1000, 'r','Marker','none','LineWidth',1)
title('Signal x11 - Transmit to send a digital 1000','fontSize',18)
subplot(921);
stem(n,x1001, 'r','Marker','none','LineWidth',1)
title('Signal x11 - Transmit to send a digital 1001','fontSize',18)
subplot(922);
stem(n,x1010, 'r','Marker','none','LineWidth',1)
title('Signal x11 - Transmit to send a digital 1010','fontSize',18)
subplot(923);
stem(n,x1011, 'r','Marker','none','LineWidth',1)
title('Signal x11 - Transmit to send a digital 1011','fontSize',18)
subplot(924);
stem(n,x1100, 'r','Marker','none','LineWidth',1)
title('Signal x11 - Transmit to send a digital 1100','fontSize',18)
subplot(925);
stem(n,x1101, 'r','Marker','none','LineWidth',1)
title('Signal x11 - Transmit to send a digital 1101','fontSize',18)
subplot(926);
stem(n,x1110, 'r','Marker','none','LineWidth',1)
title('Signal x11 - Transmit to send a digital 1110','fontSize',18)
subplot(927);
stem(n,x1111, 'r','Marker','none','LineWidth',1)
title('Signal x11 - Transmit to send a digital 1111','fontSize',18)
noisefactor = 0.2
TX = randi([1 16]);
y=signals(:,TX) + noisefactor*randn(size(x0000));
y=y./norm(y); % normalize y
subplot(928)
stem(L,L,'k','Marker','none','LineWidth',1)
title('Received signal - Which Symbol is it?','fontSize',18)
%compute the inter products between y and all of the symbols:
innerproductsym0000 = abs (dot(y,x0000) )
innerproductsym0001 = abs (dot(y,x0001) )
innerproductsym0010 = abs (dot(y,x0010) )
innerproductsym0011 = abs (dot(y,x0011) )
innerproductsym0100 = abs (dot(y,x0100) )
innerproductsym0101 = abs (dot(y,x0101) )
innerproductsym0110 = abs (dot(y,x0110) )
innerproductsym0111 = abs (dot(y,x0111) )
innerproductsym1000 = abs (dot(y,x1000) )
innerproductsym1001 = abs (dot(y,x1001) )
innerproductsym1010 = abs (dot(y,x1010) )
innerproductsym1011 = abs (dot(y,x1011) )
innerproductsym1100 = abs (dot(y,x1100) )
innerproductsym1101 = abs (dot(y,x1101) )
innerproductsym1110 = abs (dot(y,x1110) )
innerproductsym1111 = abs (dot(y,x1111) )

2 Comments
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Jan on 26 Apr 2022

If you do not hide an index in the name of the variable as in "x0000", but use an array instead, the code could be simplified massively using loops.

The notation "subplot(928)" is outdated for over 25 years now. Prefer the modern subplot(9, 2, 8).

You post some code. What is your question? What do you want to "combine" and how?

ethan watts on 27 Apr 2022

yes my question is how can i go about making all 16 graphs plot in the run window the current code is giving me this, and it is still missing 3 out of the 13 plots

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Answer 1

Johannes Hougaard on 27 Apr 2022

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https://in.mathworks.com/matlabcentral/answers/1705890-how-to-combine-multiple-plots-using-subplot#answer_951935

Open in MATLAB Online

You have to define all your subplots in the [9 2] grid - the code you present show the first 9 graphs in a [9 1] grid and the last 7 in a [9 2] grid.

That would be that you change the code to

subplot(9,2,1);
stem(n,x0000, 'b','Marker','none','LineWidth',1)
title('Signal x0000 - Transmit to send a digital 0000','fontSize',18)
subplot(9,2,2);
stem(n,x0001, 'r','Marker','none','LineWidth',1)
title('Signal x0001 - Transmit to send a digital 0001','fontSize',18)
% Many lines to follow until
subplot(9,2,10);
stem(n,x1001, 'r','Marker','none','LineWidth',1)
title('Signal x11 - Transmit to send a digital 1001','fontSize',18)
subplot(9,2,11);
stem(n,x1010, 'r','Marker','none','LineWidth',1)
title('Signal x11 - Transmit to send a digital 1010','fontSize',18)
% Finishing with
subplot(9,2,16);
stem(n,x1111, 'r','Marker','none','LineWidth',1)
title('Signal x11 - Transmit to send a digital 1111','fontSize',18)
noisefactor = 0.2
TX = randi([1 16]);
y=signals(:,TX) + noisefactor*randn(size(x0000));
y=y./norm(y); % normalize y
subplot(9,2,17)
stem(L,L,'k','Marker','none','LineWidth',1)
title('Received signal - Which Symbol is it?','fontSize',18)

Which for your full code could be something like this

clear

clc

N = 256;

n = 0:N-1;

x0000 = [ones(16,1); zeros(240,1)];

x0000 = x0000/norm(x0000);

x0001 = [zeros(16,1); ones(16,1); zeros(224,1)];

norm(x0001);

x0001 = x0001/norm(x0001);

x0010 = [zeros(32,1); ones(16,1); zeros(208,1)];

norm(x0010);

x0010 = x0010/norm(x0010);

x0011 = [zeros(48,1);ones(16,1); zeros(192,1)];

norm(x0011);

x0011 = x0011/norm(x0011);

x0100 = [zeros(64,1);ones(16,1); zeros(176,1)];

norm(x0100);

x0100 = x0100/norm(x0100);

x0101 = [zeros(80,1); ones(16,1); zeros(160,1)];

norm(x0101);

x0101 = x0101/norm(x0101);

x0110 = [zeros(96,1); ones(16,1); zeros(144,1)];

norm(x0110);

x0110 = x0110/norm(x0110);

x0111 = [zeros(112,1); ones(16,1); zeros(128,1)];

norm(x0111);

x0111 = x0111/norm(x0111);

x1000 = [zeros(128,1); ones(16,1); zeros(112,1)];

norm(x1000);

x1000 = x1000/norm(x1000);

x1001 = [zeros(144,1); ones(16,1); zeros(96,1)];

norm(x1001);

x1001 = x1001/norm(x1001);

x1010 = [zeros(160,1); ones(16,1); zeros(80,1)];

norm(x1010);

x1010 = x1010/norm(x1010);

x1011 = [zeros(176,1); ones(16,1); zeros(64,1)];

norm(x1011);

x1011 = x1011/norm(x1011);

x1100 = [zeros(192,1); ones(16,1); zeros(48,1)];

norm(x1100);

x1100 = x1100/norm(x1100);

x1101 = [zeros(208,1); ones(16,1); zeros(32,1)];

norm(x1101);

x1101 = x1101/norm(x1101);

x1110 = [zeros(224,1); ones(16,1); zeros(16,1)];

norm(x1110);

x1110 = x1110/norm(x1110);

x1111 = [zeros(240,1); ones(16,1)];

norm(x1111);

x1111 = x1111/norm(x1111);

signals=[x0000,x0001,x0010,x0011,x0100,x0101,x0110,x0111,x1000,x1001,x1010,x1011,x1100,x1101,x1110,x1111];

fh = figure;

ii = 1;

subplot(9,2,ii); ii = ii+1;

stem(n,x0000, 'b','Marker','none','LineWidth',1)

title('Signal x0000 - Transmit to send a digital 0000','fontSize',18)

subplot(9,2,ii); ii = ii+1;

stem(n,x0001, 'r','Marker','none','LineWidth',1)

title('Signal x0001 - Transmit to send a digital 0001','fontSize',18)

subplot(9,2,ii); ii = ii+1;

stem(n,x0010, 'r','Marker','none','LineWidth',1)

title('Signal x0010 - Transmit to send a digital 0010','fontSize',18)

subplot(9,2,ii); ii = ii+1;

stem(n,x0011, 'r','Marker','none','LineWidth',1)

title('Signal x11 - Transmit to send a digital 0011','fontSize',18)

subplot(9,2,ii); ii = ii+1;

stem(n,x0100, 'r','Marker','none','LineWidth',1)

title('Signal x11 - Transmit to send a digital 0100','fontSize',18)

subplot(9,2,ii); ii = ii+1;

stem(n,x0101, 'r','Marker','none','LineWidth',1)

title('Signal x11 - Transmit to send a digital 0101','fontSize',18)

subplot(9,2,ii); ii = ii+1;

stem(n,x0110, 'r','Marker','none','LineWidth',1)

title('Signal x11 - Transmit to send a digital 0110','fontSize',18)

subplot(9,2,ii); ii = ii+1;

stem(n,x0111, 'r','Marker','none','LineWidth',1)

title('Signal x11 - Transmit to send a digital 0111','fontSize',18)

subplot(9,2,ii); ii = ii+1;

stem(n,x1000, 'r','Marker','none','LineWidth',1)

title('Signal x11 - Transmit to send a digital 1000','fontSize',18)

subplot(9,2,ii); ii = ii+1;

stem(n,x1001, 'r','Marker','none','LineWidth',1)

title('Signal x11 - Transmit to send a digital 1001','fontSize',18)

subplot(9,2,ii); ii = ii+1;

stem(n,x1010, 'r','Marker','none','LineWidth',1)

title('Signal x11 - Transmit to send a digital 1010','fontSize',18)

subplot(9,2,ii); ii = ii+1;

stem(n,x1011, 'r','Marker','none','LineWidth',1)

title('Signal x11 - Transmit to send a digital 1011','fontSize',18)

subplot(9,2,ii); ii = ii+1;

stem(n,x1100, 'r','Marker','none','LineWidth',1)

title('Signal x11 - Transmit to send a digital 1100','fontSize',18)

subplot(9,2,ii); ii = ii+1;

stem(n,x1101, 'r','Marker','none','LineWidth',1)

title('Signal x11 - Transmit to send a digital 1101','fontSize',18)

subplot(9,2,ii); ii = ii+1;

stem(n,x1110, 'r','Marker','none','LineWidth',1)

title('Signal x11 - Transmit to send a digital 1110','fontSize',18)

subplot(9,2,ii); ii = ii+1;

stem(n,x1111, 'r','Marker','none','LineWidth',1)

title('Signal x11 - Transmit to send a digital 1111','fontSize',18)

noisefactor = 0.2;

TX = randi([1 16]);

y=signals(:,TX) + noisefactor*randn(size(x0000));

y=y./norm(y); % normalize y

subplot(9,2,ii); ii = ii+1; clear ii

stem(L,L,'k','Marker','none','LineWidth',1)

Unrecognized function or variable 'L'.

title('Received signal - Which Symbol is it?','fontSize',18)

fh.WindowState = 'maximized'; clear fh

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