Why do I get an error when I try to use the solve function?

Question

0 个投票

When I type the following command in matlab >> [x,y] = solve('x+2*y=4','2*x - y=3'),

I get the following error

Check for incorrect argument data type or missing argument in call to function 'solve'.

I was hoping someone could help me fix this. Thanks.

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Answer 1

Star Strider 2022-3-20

0 个投票

The quoted character array notationi may no longer be usable.

Try this isntead —

syms x y 
[x,y] = solve(x+2*y == 4, 2*x - y == 3),
x = 2
y = 1

.

Answer 2

Paul 2022-3-20

0 个投票

solve() requires the inputs to be Symbolic Math objects

syms x y
[x,y] = solve(x + 2*y == 4, 2*x - y == 3)  % note the use of == as required to define an equation
x = 2
y = 1