Empty sym: 0-by-1
2 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
I am really really new to matlab and essentially just playing around with it. However, I have come across an issue that I am not fully sure how to resolve.
My code is incredibly simple:
syms R
X = 3;
h1 = .5 - [.25 - (1/4*(R^2))*((R^2)-.0625)]^(1/2) == 5;
solve(h1,R)
However, when I try to solve h1 when it equals any value other than zero, I get the error - Empty sym: 0-by-1. Can anyone explain to me why this is happening?
0 comentarios
Respuestas (1)
Marco Riani
el 4 de En. de 2020
First of all it is necessary to replace [ ] with ( ) in your equation.
h1= .5 - (.25 - (1/4*(R^2))*((R^2)-.0625))^(1/2) == 5;
solve(h1,R)
Finally, If you try to plot your equation
x=-200:0.1:200;
y=.5 - (.25 - (1/4*(x.^2)).*((x.^2)-.0625)).^(1/2) -5;
plot(x,y)
you can see that y is never 0
Hope it helps
1 comentario
Walter Roberson
el 4 de En. de 2020
It is not necessary to replace the [] with (), but the code is more efficient if you do use ()
Ver también
Categorías
Más información sobre Conversion Between Symbolic and Numeric en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!