How to get == to help solving equations
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Hello.
I cant get my matlab to stop putting out logical when i use the == command before trying to solve.
syms y
x = 5*y == 20
solve(x,y)
I can see that it makes sense that matlab says that 5*y is not equal to 20
but my study buddies can use the solve command after on x for the variable y to solve equations in matlab.
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Respuestas (2)
madhan ravi
el 15 de Oct. de 2020
Editada: madhan ravi
el 15 de Oct. de 2020
You should have the Symbolic Math Toolbox and the license for it to perform the above operation. In order to replicate your message , experimented with the below code:
>> y = 1
y =
1
>> syms y
x = 5*y == 20
solve(x,y)
x =
5*y == 20
ans =
4
>>
So probably it has to do with you not having the toolbox/license.
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Steven Lord
el 16 de Oct. de 2020
My guess would be that you had redefined y between the syms call and when you tried to use it as a symbolic variable.
syms y
f = 5*y == 20 % symbolic equation
syms z
z = 2; % z is no longer symbolic
g = 5*z == 20 % logical false as 10 is not equal to 20
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