Solving an Equation with given variables
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I'm learning matlab and trying to set up an code to solve an equation with given inputs, where those inputs might not be for the same variable every time. e.g. f = x + y sometimes you have x and y, other times you have f and x, etc.
Right now I'm just trying to get the solve function to work, I can worry about input prompts later.
clc
syms f x y
f = 5;
x=2;
f == x + y;
S = solve(f,y)
I'm getting a return of an empty matrix.
S =
Empty sym: 0-by-1
The tutorial tells me it's because the solution doesn't exist. Obviously the solution is y=3.
Thank you for your assistance!
回答（1 个）
Walter Roberson
2017-6-10
f == x + y;
is not an assignment statement.
eqn = f == x + y;
S = solve(eqn, y)
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2017-6-9
2017-6-10
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