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Student Support Forum: 'Threshold Value, evaluate function.' topicStudent Support Forum > General > Archives > "Threshold Value, evaluate function."

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PS
02/28/12 8:29pm

Hi,

I'm new to mathematica, so I'm sorry if this is a no-brainer.

I am trying to plot a function which is dependent upon another function's output reaching a given threshold value. Both are functions of t. The second function is dependent upon a pulse function and is plotting just fine, but the second isn't working.

The error message I keep receiving is:
ReplaceAll::reps: {___________________} is neither a list of replacement rules nor a valid dispatch table, and so cannot be used for replacing. >>

for instance: ReplaceAll::reps: {If[Y[0.0000715]>=0.5,Z[t]==(E^(-d t) (E^Times[<<2>>] p1 p2 \
Pmax-Power[<<2>>] p1 p2 Pmax Plus[<<2>>]+d^2 \
(Times[<<3>>]+Zbasal)))/d^2,Z[t]==0]} is neither a list of replacement rules nor a valid dispatch table, and so cannot be used for replacing. >>


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Author Date Posted
Threshold Value, evaluate function. PS 02/28/12 8:29pm
Re: Threshold Value, evaluate function. Bill Simpson 02/29/12 1:42pm
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