1,142 reputation
319
bio website
location Sherwood Park, Canada
age 55
visits member for 2 years, 8 months
seen Nov 20 at 15:02

I'm a "retired" junior/senior high math teacher. I now do a lot of one on one tutoring, and take my computer to illustrate concepts where possible. I've never had any formal computer training so I'm piecing together Mathematica knowledge as I read posts and get my questions answered. I appreciate the amazing help I've gotten at this website.


Nov
5
accepted How to have shaded grid entries
Nov
4
comment How to have shaded grid entries
I appreciate the pedagogical note, that IS important. Sadly, those kinds of subtle nuances are lost on about 99% of my students (pardon my cynicism!) I'm happy if they actually understand a dB is a tenth of a Bel!
Nov
4
comment How to have shaded grid entries
That looks fantastic, and simple to implement!
Nov
4
asked How to have shaded grid entries
Oct
24
comment Intersecting parabolas in an image
I tried to do a "brute force" parabola creation on the un-edited image. I'm no mathematician but I could NOT get the last parabola (farthest to the left) to match the bridge, but the one farthest to the right matched "perfectly". You could be right, but based on the answer below, my intuition tells me that the distortion WILL require correction...
Oct
24
comment Intersecting parabolas in an image
Brilliant,helpful, I appreciate your "step by step" discussion, I learned a lot.
Oct
24
comment Intersecting parabolas in an image
Amazing answer, I will have to experiment with edge detection for other photos!
Oct
24
accepted Intersecting parabolas in an image
Oct
23
awarded  Nice Question
Oct
23
comment Intersecting parabolas in an image
Yes, you got me there... I got the name from my friend (a Calgarian!) I guess even if you live there you may know all the names... I don't know all the bridge names for Edmonton (where I live). Thanks for the correction and link!
Oct
23
comment Intersecting parabolas in an image
Thanks for that, that's a great resource. I will have to see if there is data online for the bridge in my friend's photo (St. George's bridge in Calgary, AB)
Oct
23
asked Intersecting parabolas in an image
Sep
24
awarded  Autobiographer
Sep
20
answered How do I know if NotebookLocate did not find the cell tag?
Sep
19
comment Using Permutations to create numbers
I appreciate your answer, totally different approach. I did want 68, my questions was badly worded. I know the end of that command is something I need to learn more about... not using Mathematica a lot, it's concise and probably clear, but I can't navigate all the @# && once it gets beyond a certain level! Thank you for your answer!
Sep
19
comment Using Permutations to create numbers
I will admit to a poorly worded question. As I understand it, the answer is 68, and this answer was helpful, I did this... it works for me, I understand it, and I learned something from the n_? pattern which I am unfamiliar with, thank you Cases[Union[FromDigits /@ Permutations[Range[0, 5], 3]], n_?EvenQ] // Length
Sep
19
comment Using Permutations to create numbers
...and 1 digit numbers, but I blame that on my poorly worded question, thank you for this answer
Sep
19
comment Using Permutations to create numbers
I am really sorry my question was not clear. In that line I was using Mathematica to try, TRY, to find numbers that worked, but I figured they were supposed to be the values with 2 digits, so not less than 10. It indicates my lack of skill using Mathematica. I do in fact want ALL the possible answers , which includes 1, 2 and 3 digits, and I think the answer is in fact 68. I appreciate all the answers given!
Sep
19
revised Using Permutations to create numbers
added 349 characters in body
Sep
19
awarded  Good Question