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Integration of very simple partwise definded functions fails

• To: mathgroup at smc.vnet.net
• Subject: [mg15720] Integration of very simple partwise definded functions fails
• From: "D.O." <oberfeld at psych.gp.TU-Berlin.DE>
• Date: Fri, 5 Feb 1999 03:42:18 -0500 (EST)
• Sender: owner-wri-mathgroup at wolfram.com

Hi,

I was quite surprised that Mathematica will not evaluate any Integrals
of simple functions like 

f[x_/;x<=2]:=1
f[x_/;x>2]:=2

Integrate[f[x],{x,0,1}]


NIntegrate also complains about singularities.

Do I miss something? There must be a fast way out...

Thanks for all suggestions!


Daniel Oberfeld
Institut fuer Psychologie
Allgemeine Psychologie
TU Berlin
FS1, Raum FS105
Franklinstr. 5-7
10587 Berlin
T. 030/314-79541
Fax. 030/314-25996

• Follow-Ups:
  • Re: Integration of very simple partwise definded functions fails
    • From: Jurgen Tischer <jtischer@col2.telecom.com.co>