How can I concatenate unknown numbers of row vectors?

Question

ziad tarek 2020-12-16

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/695675-how-can-i-concatenate-unknown-numbers-of-row-vectors

回答： Walter Roberson 2020-12-16

在 MATLAB Online 中打开

if I have 3 (row vectors) for examble: A , B ,C

then I can do that

X=[A B C];

but, in my program : user will determine the number of (row vectors)

so in my case I want to do something like that:

X=[a(1),a(2),a(3),.....a(n)]

which a(1) .....a(n) is row vectors

how can I do that?

sorry for bad language.

if any one understand signals

this is code (but he does not work )

I want something like that

t1=linspace(-1,1,2000);
q{1}=4*cos(2*pi*t1/4);
 
t2=linspace(1,3,2000);
q{2}=3.*t2-5;
 
t3=linspace(3,5,2000);
q{3}=.5.*t3.^2-4;
 
t4=linspace(5,7,2000);
q{4}=4*exp(-0.5*t4);
 
t=linspace(-3,7,10000);
.
.
.
. 
q{n}=4*exp(2*tn);
%I want (loop for example) to Generate something like the next line:
y=[q{1} q{2} q{3} q{4} .. .. q{n}] 

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Answer 1

Ameer Hamza 2020-12-16

2
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/695675-how-can-i-concatenate-unknown-numbers-of-row-vectors#answer_577495

在 MATLAB Online 中打开

You don't need a for-loop. For example

t1=linspace(-1,1,2000);
q{1}=4*cos(2*pi*t1/4);
 
t2=linspace(1,3,2000);
q{2}=3.*t2-5;
 
t3=linspace(3,5,2000);
q{3}=.5.*t3.^2-4;
 
t4=linspace(5,7,2000);
q{4}=4*exp(-0.5*t4);
q_all = [q{:}]; % [1x8000] vector