solve is returning symbolic value.

2013 11 30
1 个回答
更新时间：2013 11 30
10 次查看（30 天）

0 个投票

i am using the solve function but i am getting weird symbolic result instead of getting the interval i want. how can i solve this? thank you.
>> syms p
>> solve(3.1416*p/(1-p^2)^0.5<2.3)
ans =
solve([(3.1416*p)/(1.0 - 1.0*p^2)^(1/2) < 2.3], [p])
>> solve('3.1416*p/(1-p^2)^0.5<2.3')
ans =
solve([(3.1416*p)/(1.0 - 1.0*p^2)^0.5 < 2.3], [p])

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回答（1 个）

Walter Roberson
Walter Roberson 2013-11-30

0 个投票

That can happen if solve() decides that it is a kind of problem that it does not know how to answer.
Generally speaking, you should solve for equalities rather than inequalities.
One trick is to convert something of the form
syms A B
solve(A < B)
into the form
syms A B
syms delta positive
A = B - delta

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提问:

Paolo
Paolo
2013-11-30

回答：

Walter Roberson
Walter Roberson
2013-11-30

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