how to use the output of 'solve' in another equation
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Hi everyone I used 'solve' function to solve an equation and got a variable 'v' then I converted it to double. The problem is when I wrote two equations with two variables x and y which contain v as a constant, I did not get the values of x and y but instead a symbolic expression in v. How can I make the program substitute with the value of v I already got from the first step. v=double(solve('3*v/5+v+8')); S=solve('x+y=1','x-11*y=-v'); yield a solution in v S.x=11/12-1/12*v S.y=1/12*v+1/12
1 comentario
Walter Roberson
el 5 de Dic. de 2011
http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup
Respuesta aceptada
Walter Roberson
el 5 de Dic. de 2011
Sx = double(subs(S.x, 'v', v));
Sy = double(subs(S.y, 'v', v));
However, it would be shorter if you used
syms x y
[Sx Sy] = double( solve('3*v/5+v+8', 'x+y=1','x-11*y=-v', x, y) );
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