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Create 2D View of 3D Vector?
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Two questions:
1) Why is the 2D view in the attached file created from eq:1 blank? How can I make it visible?
2) Can you show side by side the 2D vector produced by multiplying a 3D vector by a 2x3 matrix?
Thanks
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geogebraexport.ggb
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I've posted to this forum several times already; each time my questions are vetted for hours before allowing to appear. Why are my questions on moderation for so long?
Well, there's no guaranteed GG 24h surveillance. Moderation is done by some team members, developpers and volonteers as I am one. I happen to live in Belgium and have some night rest and GGfree time during the day according to my time zone. Probably it's the same for others who're in. That's all
chris
Hi Dave,
your 2d View from the plane eq 2 is empty, because there are no objects in it, except the plane itself. You can currently show grids and axes on that View, but nothing else. Try creating a point on that plane, e.g. Point(eq2): this point will be shown both in 3D and 2d Views.
I think that what I've written above answers also your other question :smile: if you create a 2d View from a plane containing your vector.
Please use CAS for products of nonsquare matrices * vectors.
https://wiki.geogebra.org/e... (using the input line you can multiply only 2x2 or 3x3 matrices by a vector)
Please have a look at the sample file attached. Just a little rework of yours.
Open the CAS View to see the definition of the product.
I have created a vector u as product, then a plane through it, and a 2d view of the plane, where the vector, which lies on it, is visible. Is this what you want?
without CAS you can use vector(A v)
for A 2x3 matrix and vector v in R3 the result is in R2 in graphics window
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