In this particular case, you can reformulate the plot with Csct instead of 1/Sint and things seem to work: ParametricPlot{Csct, t}, {t, 0, 3 Pi}, Exclusions -> {Sint == 0} I suspect the behavior with 1/Sint is simply a bug and will report it as such As a more-general workaround, you can wrap your original expression with Quiet to surpress the error messages: QuietParametricPlot{1/Sint, t}, {t, 0, 3 Pi}, Exclusions -> Sint == 0, Power::infy.
In this particular case, you can reformulate the plot with Csct instead of 1/Sint and things seem to work: ParametricPlot{Csct, t}, {t, 0, 3 Pi}, Exclusions -> {Sint == 0} I suspect the behavior with 1/Sint is simply a bug and will report it as such. As a more-general workaround, you can wrap your original expression with Quiet to surpress the error messages: QuietParametricPlot{1/Sint, t}, {t, 0, 3 Pi}, Exclusions -> Sint == 0, Power::infy.
Thanks! I didn't know about Quiet. – Rob N Oct 12 '10 at 22:38.
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