Re: Problems with Solve
- To: mathgroup at smc.vnet.net
- Subject: [mg17032] Re: [mg17010] Problems with Solve
- From: Maarten.vanderBurgt at icos.be
- Date: Wed, 14 Apr 1999 02:11:49 -0400
- Sender: owner-wri-mathgroup at wolfram.com
Tanveer,
You can use the ReplaceAll (/.) substitution command as in the example
below.
Here the two solutions of x^2 + a == b are stored in variables x1 and x2.
In[1]:= sol = Solve[x^2 + a == b, x]
Out[1]= {{x -> -Sqrt[-a + b]}, {x -> Sqrt[-a + b]}}
In[2]:= x1 = x /. sol[[1]]
x2 = x /. sol[[2]]
Out[3]= -Sqrt[-a + b]
Out[4]= Sqrt[-a + b]
Maarten
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Maarten van der Burgt
R&D Department
ICOS Vision Systems
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tel. + 32 16 398220 direct + 32 16 398316 fax. + 32 16
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e-mail: maarten.vanderburgt at icos.be
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Tanveer Choudhury <tanveer at wam.umd.edu> on 10-04-99 08:13:40 AM
Subject: [mg17032] [mg17010] Problems with Solve
I have an equation
eqn == rhs
Solving in the following way
Solve[eqn,x]
the output is something like
x->2.11
how do I save the value for x to someother variable...
u can mail to tanveer at wam.umd.edu
thanx