Why does the "simple" function in the Symbolic Math Toolbox cause MATLAB to hang when trying to simplify my expression?
23 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
MathWorks Support Team
el 2 de Dic. de 2014
Editada: MathWorks Support Team
el 12 de Ag. de 2020
I have created the following expression using symbolic variables:
>> syms x y z a b c iu iv su sv;
>> x_hat = cos(iv)*( cos(su)*sin(sv)*z - sin(su)*sin(sv)*y + cos(sv)*x +a ) ...
- sin(iv)*( cos(su)*cos(sv)*z - sin(su)*cos(sv)*y - sin(sv)*x +b ) ;
>> y_hat = cos(iu)*( sin(su)*z + cos(su)*y + c ) ...
- sin(iu)*sin(iv)*( cos(su)*sin(sv)*z - sin(su)*sin(sv)*y - cos(sv)*x +b ) ...
- sin(iu)*cos(iv)*( cos(su)*cos(sv)*z - sin(su)*cos(sv)*y - sin(sv)*x +a ) ;
When I try to simplify this expression with the "simple" function, it produces a lot of output to the Command Window, but remains 'Busy' and does not yield a simplified expression. How can I fix this?
>> simple(diff(atan( x_hat / y_hat ),x))
Respuesta aceptada
MathWorks Support Team
el 8 de Jul. de 2020
Editada: MathWorks Support Team
el 12 de Ag. de 2020
The use of 'simple' function is no longer supported. Instead, you should use the "simplify" function, which works much faster on this example and does yield a simplified form of the expression.
0 comentarios
Más respuestas (0)
Ver también
Categorías
Más información sobre Assumptions 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!