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op(plot1)

Posted on 2008-02-03 17:54 By alfrie55 (1)
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What is wrong in here, please help:

 

dustplot0:=(points)->odeplot(duffing, [x(t),y(t)], 0..(2*Pi*points), numpoints=points);
plot1 := dustplot0(100):
plot1;

plot2:=PLOT(POINTS(op(op(1,op(plot1))),COLOUR(RGB, 0, 0.2,0.5),SYMBOL(POINT))):
plot2;
Error, invalid input: op expects 1 or 2 arguments, but received 3

I do not understand the reason for this error.

 

Thanks
 

‹ converting tan(z) to sum form with assumption Adding in execution group ›

Is this what you want?

Comment on 2008-02-03 20:23 from jaytreiman (Maple Rating 1 41)

I think you got two things out of op(plot1).  Try

 

plot2:=PLOT(POINTS(op(1,op(1,plot1)),COLOUR(RGB, 0, 0.2,0.5),SYMBOL(POINT))):

or

plot2:=PLOT(POINTS(op([1,1],plot1),COLOUR(RGB, 0, 0.2,0.5),SYMBOL(POINT))):

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