Subs with 2 numbers returns a number
2 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
Subs when given 2 numbers, returns a number. But I need a string/function to be returned
example:
>> syms x y;
>> f=-y+x+2;
>> subs(f, [x,y], [2,2])
ans =
2
>>
But I need it: -2+2+2
0 comentarios
Respuestas (2)
Star Strider
el 10 de Nov. de 2021
It is doing the substitution and the calculation at the same time, and providing the answer.
Using symbolic arguments instead —
syms x y a b
f=-y+x+2;
subs(f, [x,y], [a,b])
as expected.
.
0 comentarios
John D'Errico
el 11 de Nov. de 2021
Simple enough. Convert the original expression to a string. Now just do string processing, with finds and replace operations.
Can you do it using symbolic computations? Probably not, since subs will combine those numeric constants for you automatically.
0 comentarios
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!