How can I write the following matrix?
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Michelle Ashwini
am 13 Mär. 2014
Kommentiert: Michelle Ashwini
am 14 Mär. 2014
if true
A = [x(1)^2 x(1)*y(1) y(1)^2 x(1) 1;
x(2)^2 x(2)*y(2) y(2)^2 x(2) 1;
x(3)^2 x(3)*y(3) y(3)^2 x(3) 1;
x(4)^2 x(4)*y(4) y(4)^2 x(4) 1;
x(5)^2 x(5)*y(5) y(5)^2 x(5) 1;
x(6)^2 x(6)*y(6) y(6)^2 x(6) 1;
x(7)^2 x(7)*y(7) y(7)^2 x(7) 1;
x(8)^2 x(8)*y(8) y(8)^2 x(8) 1;
x(9)^2 x(9)*y(9) y(9)^2 x(9) 1;
x(10)^2 x(10)*y(10) y(10)^2 x(10) 1 ]
end
The integers 1-10 are meant to be subscripts. I've tried using the syms and repmat functions but have not gotten anywhere further.
1 Kommentar
Akzeptierte Antwort
Marta Salas
am 13 Mär. 2014
x = sym('x', [10 1]);
y = sym('y', [10 1]);
if true
A = [x(1)^2 x(1)*y(1) y(1)^2 x(1) 1;
x(2)^2 x(2)*y(2) y(2)^2 x(2) 1;
x(3)^2 x(3)*y(3) y(3)^2 x(3) 1;
x(4)^2 x(4)*y(4) y(4)^2 x(4) 1;
x(5)^2 x(5)*y(5) y(5)^2 x(5) 1;
x(6)^2 x(6)*y(6) y(6)^2 x(6) 1;
x(7)^2 x(7)*y(7) y(7)^2 x(7) 1;
x(8)^2 x(8)*y(8) y(8)^2 x(8) 1;
x(9)^2 x(9)*y(9) y(9)^2 x(9) 1;
x(10)^2 x(10)*y(10) y(10)^2 x(10) 1 ]
end
11 Kommentare
Marta Salas
am 14 Mär. 2014
Bearbeitet: Marta Salas
am 14 Mär. 2014
Type "ver" on the command line. MATLAB lists all the installed toolboxes. Look for Symbolic Math Toolbox. If you don't have the toolbox, you can not use the symbolic functions.
Weitere Antworten (1)
Azzi Abdelmalek
am 13 Mär. 2014
Bearbeitet: Azzi Abdelmalek
am 13 Mär. 2014
out=[x.^2 x.*y y.^2.*x ones(10,1)]
% x and y are column vextors
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