RE : how can I solve a function Erfc
- To: mathgroup at smc.vnet.net
- Subject: [mg48425] RE : [mg48396] how can I solve a function Erfc
- From: "Florian Jaccard" <florian.jaccard at eiaj.ch>
- Date: Sat, 29 May 2004 03:06:46 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Bonjour !
Est-ce que cela te va ?
In[7]:=
Information["Erfc", LongForm -> False]
"Erfc[z] gives the complementary error function erfc(z)
In[8]:=
Information["InverseErfc", LongForm -> False]
"InverseErfc[s] gives the inverse complementary error \
function obtained as the solution for z in s = erfc(z)
In[9]:=
L/(4*(Dg*t)^(1/2)) == InverseErfc[0.9]
In[10]:=
Solve[{%, Dg == 5*10^5}, t]
In[11]:=
Plot[%[[1,1,2]], {L, -10, 10}]
Meilleures salutations
F.Jaccard
-----Message d'origine-----
De : aude [mailto:montgermont.aude at ec-lille.fr]
Envoyé : vendredi, 28. mai 2004 06:50
À : mathgroup at smc.vnet.net
Objet : [mg48396] how can I solve a function Erfc
Hi,
I have to solve this function:
Erfc[L/(4*(Dg*t)^(1/2))]= 0.9
Dg is constant.
Dg=5*10^5
I want to plot t as a function of L.
thanks.
aude