9:54 AM
Russell Blyth: Ready to join the chat?
Mike May: Yes
Marius Buliga: hi
9:55 AM
Parviz Khalili: Good morning all
Tepper Gill: hi, whats the url
Mike May: rtsp://165.134.240.35/LA050630am1.sdp
Harry Mills: Checking my presence.
Harry Mills: OK. I'm here.
Mike May: Same VNC address
Joyce Quella has joined this chat.
Derrick Head: Please resend an invitation to David Thomas
Mike May: Sound and video up
10:00 AM
John Boncek has joined this chat.
John Boncek: good morning
Leah Wrenn Berman: thanks
Harry Mills: Hugh: My attempt to reply to your e-mail failed.
Harry Mills: Hi Regina. Nice work.
Luz DeAlba has joined this chat.
Russell Blyth: HM: email?
Regina Souza: hi
Tepper Gill: I need the am url for qt
Mike May: rtsp://165.134.240.35/LA050630am1.sdp
Hugh Sanders: I'm in.
Regina Souza: I had this big insight: "Maybe I should try the help command' 
Well, it solved my problem (what rookies get stuck at!)
Tepper Gill: ok, Iam in
Russell Blyth: anyone need video?
Harry Mills: No sound, as yet.
Joyce Quella: No sound
Christian Hellings: I have sound.
Russell Blyth: restart QT
Todd Ashby: I have sound
Suzanne Riehl: sound is good here
Russell Blyth: if no sound
Hugh Sanders: Sound is OK.
Dorothy Zeiser: I have sound
Michael Siddoway: Sound good here
Luz DeAlba: All OK here!
Regina Souza: not found - I'll try again
Harry Mills: Sound OK.
John Boncek: Certainly, you may go through the worksheet.
10:05 AM
Regina Souza: got it
Harry Mills: Russell: What's your "Email?" question about?
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Harry Mills: It was only about sending e-mail to Hugh. It was kicked back 
unsent.
Todd Ashby: were these worksheets sent to us via email?
Mike May: no
Mike May: with permission, we'll post them later
Todd Ashby: ok
Mike May: (Permission is now sought from the authors)
John Boncek: Mike = you may post mine. Suggestions/improvements 
welcome!
Mike May: David - please narrate as you see fit
Mike May: applies to each (set of) authors
Suzanne Riehl: You can post mine.
Mike May: if you have a worksheet to send, please ask me to invite you to a 
private chat so we can get the file via chat
10:10 AM
Mike May: That seems to work well
David Huckaby: Ok! Good tip for the first revision. 
Mike May: noting these are all *first* drafts - darn good ones
David Huckaby: Mine had a horizontal axis, but no vertical axis.
Regina Souza: Could you comment on the difference between plots and 
plottools? My code for arrow did not work because I had both packages loaded, 
and it wanted in the syntax for plottools
David Huckaby: Yours seems to have neither.
David Huckaby: regina2005mt, I had the same problem!
Mike May: did you code in 9.5 or 10?
David Huckaby: I just didn't load plottools.
Regina Souza: in 10
David Huckaby: I coded in 9.5.
Harry Mills: sound cut out.
Mike May: we're running in 10, that might explain the different appearance of 
this graph
Mike May: anyone else on sound?
10:15 AM
Suzanne Riehl: I still have sound
Harry Mills: Sound back.
Mike May: OK
Harry Mills: Had to re-open QT. Russell's link defaulted to realplayer.
Mike May: Ah - that would do it - don't click on the link, copy and paste only
Harry Mills: Thx, Mike.
Mike May: (just to be confusing, "Mike" is Russell right now  )
David Huckaby: That part of the code needs revision for the general case.
Harry Mills: The linear combo embedded in the text explanation. Can't you 
highlight it and click on Math button? If so, won't it look "better?"
David Huckaby: Not good practice, eh?
David Huckaby: Harry, what is the math button?
Mike May: is fine for first draft - good work for a day or two of warning
10:20 AM
David Huckaby: Harry, are you using 10 or 9.5?
Harry Mills: David: Upper left of Maple window. There're two buttons side=by-
side: Text and Math
Harry Mills: David: Don't sweat my teeny tiny comments. P.S. Mike's giving 
you a better explanation orally right now.
Mike May: change to next video am2
David Huckaby: Harry: I'll take all the help I can get! 
Mike May: up
Harry Mills: I'm using v10, David. And your work is just fine!
David Huckaby: Thanks. 
Harry Mills: I really like the renderings of scalar multiples of the vectors in 
different colors, so students can SEE what's going on.
Mike May: yes, that's nice
David Huckaby: That random stuff is of course all from you guys (and other 
participants noting what a great idea that is).
Harry Mills: Using different line thicknesses ensures that you can see all of 
'em, too. nice.
10:25 AM
David Huckaby: Yeah, but sometimes all the arrows show up, and 
sometimes some are obscured. Don't know why.
Harry Mills: David: It probably relates to the order in which you call them. I 
suspect if you plot the "smaller multiples" last, they'll superimpose on the larger. 
Using a greater thickness on the "larger/longer" ones
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David Huckaby: Ah!
David Huckaby: Harry: The problem was with the vectors that end up in 
exactly the same place. Even plotting the thinker ones first didn't work.
David Thomas: What is difference between a list and a set?
David Huckaby: But Mike's method (using the list rather than the set) seems 
to work well.
Mike May: A set is not ordered
David Thomas: Coding wise?
Mike May: {} for set
Mike May: [] for list
Mike May: <> for vector
10:30 AM
David Huckaby: Thanks, everyone. 
Mike May: Thanks for going first!
Suzanne Riehl: This is REALLY rough!
Suzanne Riehl: I didn't get to the plotting.
Mike May: that's ok
Suzanne Riehl: If your call the procedure with [0,0], it works.
Suzanne Riehl: I didn't hear your instructions, RB
Suzanne Riehl: I'm testing the procedure. If you use [0,0] instead of [5/7, 0], 
the procedure works.
10:35 AM
Regina Souza: I don't get the notation: it seems we are adding a number to a 
pair...
Todd Ashby: David: How long to create your workseet?
David Huckaby: I actually did it yesterday evening.
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Suzanne Riehl: I also tried using evalf([x1,y1], 3) as the last line of the 
procedure -- it returned a decimal but using that output the next time still caused 
problems.
David Huckaby: In fact, I had a first version in which I used row reduction 
rather than colspace, nullspace commands.
David Huckaby: And the computer froze and lost it!
Todd Ashby: Thanks.
David Huckaby: No problem. 
10:40 AM
Mike May: SR - right now you're trying to get the sub thing working, right, how 
to iterate?
Mike May: I really like the idea for this worksheet
Suzanne Riehl: Yes -- once the procedure works, then a loop will produce 10 
or 20 points to plot.
Mike May: yes
David Huckaby: Todd: One more thing. If you haven't started yet (or even if 
you have), you might consider working off one or more of Mike and Russell's 
worksheets. I used theirs as a template. Otherwise, it would have taken *much* 
longer.
10:45 AM
John Boncek: qrsvd: I agree. I found THAT out yesterday. 
Todd Ashby: understand.
Suzanne Riehl: Yes. the solution goes to 1,2
Mike May: changing tapes
Mike May: video off
Mike May: am3 coming up
Regina Souza: neat! Very instructive also in how to attempt to debug (not that 
I can see me operating at that level very soon)
Mike May: video should be up
Suzanne Riehl: Can you also plot the two equations?
10:50 AM
Suzanne Riehl: No -- method won't always work. Text book also shows points 
generated connected by dashed lines.
David Thomas: How did you get the return without moving to the next >?
John Boncek: in maple 8, you hold down the shift key and hit enter
Regina Souza: y from -5 to 5 also?
10:55 AM
Regina Souza: so that the y values will fit?
Suzanne Riehl: This is fun ... but it might be better to move on to next 
worksheet.
David Thomas: missing comma
John Boncek: This is a great worksheet.
Suzanne Riehl: Thanks for the help!
Regina Souza: why the view command did not work?
Steve Prothero: It might be nice to have a non-convergent example ready for 
students to try
Regina Souza: 
Steve Prothero: I didn't mean you/now I was suggesting that the prof be ready 
when using the sheet
11:00 AM
Parviz Khalili: This is a project that I gave my students
John Boncek: We have a "Computing for Mathematics" course -- this 
worksheet would be a great exercise to show what Maple can do.
Suzanne Riehl: The example the text has for divergence is x - y = 1 and 2x+y 
= 5, initial guess (0,0).
Parviz Khalili: This basically solves a least square problem.
Parviz Khalili: We solve AX=B with the least square method
Parviz Khalili: The next piece is the cubicfit
David Huckaby: That's really cool putting them on the same graph.
11:05 AM
Parviz Khalili: The next is sixth order fit
John Boncek: Nice graphic.
Parviz Khalili: That woild be nice
Mike May: video changing
Mike May: am4
11:10 AM
Mike May: up
Mike May: not up
Mike May: sorry
Mike May: now up
Mike May: any other comments/questions?
Parviz Khalili: That is more efficiet
Mike May: nice worksheet!
Parviz Khalili: I should have added more text
Mike May: PK and DH can we put your w/sheets on the web site?
Mike May: it's great for a short time
Parviz Khalili: Sure you can. Feel free to add text to it if you want
David Huckaby: As long as it's clear that it's just a first draft. 
John Boncek: my audio is in and out, so I might not catch everything. I see this 
as being a supplemental lecture that I can post online.
Harry Mills: Yes. This disc. relates to the use of "long" variable names. A, A1, 
B, B3, etc. aren't as transparent to the student as, for instance, 
BigMatrixThatDoesNeatThings
11:15 AM
John Boncek: Mike: I use BIG type on my machine too
Harry Mills: Careful about the use of "%". It can get you in trouble, because it's 
the LAST thing Maple executed, and not necessarily the line above.
John Boncek: Right -- I knew that!
Harry Mills: Heh.
John Boncek: John's Law: Don't Write Worksheets after Midnight.
Harry Mills: yes, it's useful. But students tend not to re-execute the line above 
in its appropriate context, and then wonder what's happening.
Harry Mills: It's a great way for an instructor to convince students that the 
software prefers the instructor over anyone else.
11:20 AM
Harry Mills: Same code. Works for me, but not for you. HA!
Regina Souza: I use !!! quite often (just in case)
John Boncek: I was thinking about starting in the middle. Hence the restart 
commands
Harry Mills: Now that I have a reasonably fast computer, I use !!! a lot more 
than I used to
John Boncek: That's the next draft -- I didn't get the graphics done!
11:25 AM
John Boncek: right
John Boncek: "a basis, but with redundancy"
Harry Mills: John: Very nice work. EVERYONE's work so far looks quite good. 
I would that I had done more mathematics in mine.
John Boncek: Signal processing!
Harry Mills: Mine'll take about 30 seconds to plumb.
Harry Mills: Not much there, other than some plotting play that's not very 
fundamental.
John Boncek: "Frame"-work. 
Suzanne Riehl: Is there a good place to learn the differences between "subs" 
"evalf" ...
John Boncek: These sheets are great. I have garnered several ideas that I 
think will be useful
Harry Mills: Where's the "Save" and "Load" worksheet? (Its name, i.e.)
Todd Ashby: Very nice, guys!
Leah Wrenn Berman: russell, you're very faint...
Tepper Gill: is there a simple proceedure to sum n (unknown) vectors
Leah Wrenn Berman: is there a way to convert decimals to 
integers??
Harry Mills: subs is symbolic, i.e.
Harry Mills: You had a lengthy procedure that you saved and then loaded.
Harry Mills: Day 1, I believe.
11:30 AM
Michael Siddoway: I'm having difficulty drawing figures like your "Big M." A 
simple <0,0>, <0,1>,  triangle won't connect points.
Harry Mills: Homework 1
Harry Mills: hw1.mw, IIRC.
Harry Mills: Thx.
Harry Mills: assign1.mw
Michael Siddoway: that is <1/2, sqrt(3)/2>
Harry Mills: I may have something nice for you after lunch.
Suzanne Riehl: Does "help" have a place to help you choose the correct 
command? I'm still in the learning mode -- I won't remember the details of 
commands. I haven't found "help" helpful.
Leah Wrenn Berman: are you in the help browser?
Michael Siddoway: OK!
Harry Mills: Suzanne: Right-clicking on the command line, I believe.
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Hugh Sanders: Regina,
Harry Mills: No promises. Thx, gents.
Regina Souza: yes
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Michael Siddoway: That did it. Thanks
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Harry Mills: Off to lunch (steam-cleaning carpet in the in-betweens)
Mike May: OK
David Huckaby: Thanks again. 
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Michael Siddoway: In R^3 does this work?
Hugh Sanders: Regina, I'll try to get what I was doing for Part 6 done between 
now and before the next session.
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Mike May: quit video
Mike May: bye for now
Harry Mills: I see it in assign1 on VNC. Thanks, guys.
Steve Prothero: see y'all this pm
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Michael Siddoway: Thanks for a great morning
Regina Souza: ok - I'll try to initiate private chat before the pm section
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Harry Mills: *bye 4 now*
Mike May: ok
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Suzanne Riehl: I'm not sure which help I used. Several times, though, "help 
on context" was not available.
11:35 AM
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11:40 AM
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