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Question: Why does VectorCalculus:-PlotVector not work for only this specific choice of parameters of a VectorCalculus:-RootedVector?

Question:Why does VectorCalculus:-PlotVector not work for only this specific choice of parameters of a VectorCalculus:-RootedVector?

zenterix 405 Maple
vectorcalculus plotting plotvector
December 30 2022
1

I was just trying to follow along the Multivariate Calculus Study Guide.

There is an example where we are supposed to plot a "rooted vector". Basically, a vector where the tail is not at the origin.

The commands seemed pretty straightforward but are not generating the expected results. Here is a worksheet with the commands in question

w := VectorCalculus:-RootedVector(root = [-2, 1], `<,>`(1, 2))

Vector[column](%id = 36893488152235632508)

 (1)

VectorCalculus:-PlotVector(w, scaling = constrained)

  

VectorCalculus:-PlotVector(w)

  

NULL


Well wouldn't ya know? I am finally able to execute a worksheet in this question box. As you can see there is no vector being displayed. Now, after playing around with the values a bit, it seems that the root that I chose, [-2,1], seems to be the only one that won't work. In particular, the value 1 there seems to be problematic. If I use any other value (including for example 0.9999999), the vector seems to be drawn correctly. 

Why doesn't it work for the original parameters I chose?

Download PlotRootedVector.mw
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