Solving a system of equations.

>> syms alpha delta
>> solver = @(x,y) solve(x ==alpha / delta^2 , y ==(( (3*alpha*(1+delta)^2) + ( (1+alpha)*(1+alpha*delta^2)))^(0.5))/((1+alpha)^2), alpha, delta,'IgnoreProperties', true);
>> sol = solver(x,y);

Pass the desired values of x and y to the function named "solver". This will return a structure that contains the values of "alpha" and "delta", for the given x and y values.

Refer to the MATLAB documentation of solve for more details.

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Christopher Marlar 2016-2-3

在 MATLAB Online 中打开

This is what I get as an output when I try to run the solver.

Warning: Possibly spurious solutions.

In symengine
In mupadengine/evalin (line 102)
In mupadengine/feval (line 158)
In solve (line 292)
In Alpha_Delta>@(x,y)solve(x==alpha/delta^2,y==(((3*alpha*(1+delta)^2)+((1+alpha)*(1+alpha*delta^2)))^(0.5))/((1+alpha)^2),alpha,delta,'IgnoreProperties',true)

Walter Roberson 2016-2-3

Your delta is always squared so algebraically both negative and positive values are valid. The message is warning you that multiple solutions have been returned but that they might not all make sense in the overall context.

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