Visualization of Vectors and Span in R2 and R3Worksheet by Michael K. May, S.J., revised by Russell Blyth.Expanded by Regina, Hugh and Harry --- Draft 2restart: with(LinearAlgebra): with(plots): with(plottools):
<Text-field style="Heading 1" layout="Heading 1">Outline</Text-field>The basic objectives are:1) Learn the basic mechanics of entering vectors, and producing linear combinations with either addition or scalar multiplication.2) Learn to plot a set of vectors in R2 and R3.3) Visualize the effects of multiplication by scalar and of addition of vectors in R2 and R34) Using a random number generator, see what typical linear combinations of a pair of vectors look like.5) See the effect of linear transformations on the linear combination of vectors6) Apply these concepts to understand and visualize the parametric description of a line and a plane in R3
<Text-field style="Heading 1" layout="Heading 1">1. Vectors in R<Font superscript="true">2</Font> and R<Font superscript="true">3</Font>:</Text-field>The easiest way to enter a vector in R2 and R3 is as a list with angle brackets. In Maple you separate the coordinates with commas for a column vector, and with vertical bars ( | ) for a row vector. The whole vector is surrounded the with angle brackets ( < and >).
Mentally check the computations Maple is doing.Notice that vectors need to have the same length before we can add them:<1,2> + <3,4,5>;We can also enter vectors in Maple with the Vector command, which is part of the LinearAlgebra package.
Mentally check the computations Maple is doing.
<Text-field style="Heading 2" layout="Heading 2">Exercises:</Text-field>1.1) Use the last 4 digits of your telephone number to create two vectors u1 and u2 in R2. Use Maple to compute the linear combination 2*u1 + 3*u2. (Be sure to label answers to all exercises. You can either add a comment like "The answer is ..." to the Maple worksheet, or write a comment on your printout.)2.1) Pick six integers from -10 to 10 (repetitions are allowed) to create two distinct nonzero vectors z1 and z2 in R3. Use Maple to compute 1.0*z1 + 2.0*z2. Compare this to z1+2*z2.
<Text-field style="Heading 1" layout="Heading 1">2. Plotting Lists of Points:</Text-field>We plot points representing vectors with the command pointplot, which is part of the plot package.
Notice that we can plot either a set of points (sets are enclosed in curly braces and are unordered) or a list of points (lists are ordered and enclosed in square brackets). When plotting, you may want to use the view option to specify the viewing window of the plot. For the two plots above, letting x and y both range from -5 to 5 is convenient. You can also specify a symbol size to make the points easier to see.
If the vectors are in R3 instead of R2, we use the command pointplot3dUnfortunately, the default option for 3-dimensional plots in Maple is to hide the axes. This can be fixed by either clicking once on the 3-D plot above and then clicking on the icon for normal axes or by using the axes=normal option. Once again there is a view option for these 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
Click on the graph and rotate the plot to get a good idea of the location of the two points.To help visualize the point in space, it might be helpful to plot the dashed lines (which indicate the projection of the point on the coordinate planes).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 can think of the tip of the red and green segments as the points, and of the segments itself as the vectors. Click on the graph and rotate the plot to get a good idea of the location of the two points.After you click on the graph, try typing \316\270=\342\210\222160 [Enter] and \317\225=60 [Enter] on the boxes (located at the top left of the tool bar). Which angles \316\270 and \317\225 give you a good view of these vectors?
<Text-field style="Heading 2" layout="Heading 2">Exercises:</Text-field>2.1) Plot the points [1, 1], [2, -2], [-3, 3], and [4, -4] all on the same graph.2.2) Using the points z1 and z2 you defined in Exercise 2 above, plot z1, z2, z1 + z2, and 2*z1 - z2 all on the same graph.2.3) Include the dashed lines and vectors to the pictures of z1, z2 and z1+z2. Choose angles \316\270 and \317\225 that give you a good view of these three vectors.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
<Text-field style="Heading 1" layout="Heading 1">3. Visualizing operations with vectors:</Text-field>Now we are ready to visualize the result of vector operations (multiplication by scalar and addition) This is a section that I, Harry Mills, volunteered to do for Hugh and Regina. Bogged down with details of other matters, I didn't get to it. The idea was to do a VERY modest enhancement of what Russell and Mike did with the vector space operations on vectors. About all that I was thinking of adding to what's been done already was to superimpose the original vectors in harpoon form on a "cloud" of points that resulted from various operations.The main place I saw this being of use was in the linear combinations of vectors example already done by our leaders. Adding the original "basis vectors for the subspace" in harpoon form to the resulting convex hull of linear combos is something I mentioned and then our workshop leaders did on their own.Something that has NOT been done, here or there, is, by taking scalars from a bounded set, it may be useful to illustrate, for instance, a 3-D convex hull constructed from a random triple of linearly independent vectors in 3-space. It wouldn't fill the screen, but the students could convince themselves that they could fill up a ball, and eventually absorb all of 3-space (by "un-bounding" their set of scalars), which would plant the "absorbing" idea in their heads, just in case they stumble into Functional Analysis in grad school.
<Text-field style="Heading 2" layout="Heading 2">Exercises:</Text-field>3.1)