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b3m2a1
b3m2a1
4:53 AM
Really nice example by jkuczm (who I don’t think uses the site anymore) of how to build out an efficient, general function by being using Compile to do the lower level dirty work and Mathematica for validation: mathematica.stackexchange.com/a/126185/38205
 
 
2 hours later…
anhnha
anhnha
7:14 AM
any idea?
https://mathematica.stackexchange.com/questions/213250/plot-function-with-parameters-from-reduce?noredirect=1#comment545978_213250
 
 
2 hours later…
Lorenzo F
Lorenzo F
8:50 AM
Goodmorning everyone. Is there someone who can help me? I really need it. Thank you all
https://mathematica.stackexchange.com/questions/212788/levenberg-marquardt-method-for-fitting
 
Silvia
Silvia
9:22 AM
A rolling square
user image
2
 
anhnha
anhnha
10:21 AM
@LukasLang thanks, I think that solved my problem. I'm trying to understand the code now.
The figure looks very complex. Is there anyway to use Manipulate so I can examine a small set of figures at a time so it's easier to see?
 
 
5 hours later…
Lukas Lang
Lukas Lang
2:53 PM
@anhnha You should be able to just store the list of solutions into a variable, and then plots a selection on them using Manipulatet[Plot[solutions[[pos]]//Evaluate, …], …], where pos depends on Manipulate variables in some way
 
Feeds
Feeds
3:17 PM
Wolfram Blog: Biodiversity, Wealth Distribution, Mandelbrot Sets and More: Wolfram Community Highlights
posted on January 21, 2020 by Chapin Langenheim

It’s been another busy few months on Wolfram Community! If you’ve kept up with the latest posts, you may have noticed that many are live, interactive notebooks embedded directly from the Wolfram Cloud. Take advantage of this feature for your next post on the Community: when authoring your post, use the “Add Notebook” button in [...]

 
Chris K
Chris K
@Feeds I see some familiar SE names in this post!
 
 
2 hours later…
anhnha
anhnha
5:49 PM
@LukasLang
ConditionalExpression[
m /. ToRules[And @@ Cases[#, _Equal]],
And @@ Cases[#, Except@_Equal]
] & /@ List @@@ List @@ # & // Evaluate
the line ends with &
that means it's a function
but where do you apply argument to this function?
Also isn't it And @@ Cases[#, _Equal] same as And[#, _Equal]
so why do you need Cases here?
 
Lukas Lang
Lukas Lang
6:24 PM
@anhnha The full line is of the form Plot[comb // … // … & // Evaluate, …] - the application of the function happens with the // (the postfix form)
 
anhnha
anhnha
I know that postfix
but the whole expression is too complex for me to make sense
How about my two questions above?
 
Lukas Lang
Lukas Lang
As for the Cases thing: Cases[#, _Equal] evaluates to a list of matches before the And @@ part is applied - so no, the two things are not the same here
 
anhnha
anhnha
what's the argument that will replace # there?
 
Lukas Lang
Lukas Lang
the list of conditions for a single solution
I have updated the answer to be a bit more readable and added some comments - hopefully they help
A good way to see what's going on is to wrap stuff in Echo - for example Cases[Echo@#, _Equal] shows you whats being passed to Cases
 
anhnha
anhnha
6:40 PM
That's much easier to read now
One question
the argument of Plot is m
but why do you start with comb instead of m?
it looks like you're plotting comb instead of m
also do you know parameters for each bundle like this?
I want to separate them with manipulate
or different plot if not possible
 
 
2 hours later…
Arnoud Buzing
Arnoud Buzing
9:02 PM
Please note that the URLs for Technical Support "Quick Answers" have changed from e.g. support.wolfram.com/kb/41501 to support.wolfram.com/41501 (in other words, the /kb/ part is now gone)
5
The old links still work (via a redirect), but going forward please use the new URL pattern if you need to point to a "Quick Answer"
(Also the old links were briefly broken earlier today, but that should all be ok now; thanks to anyone who reported the issue!)
 

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