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7
votes
1answer
326 views
How can this type of optical illusion be created in Mathematica?
I see these around the web and would like to make them in Mathematica.
Combining them in an array is actually quite mesmerizing!
1
vote
1answer
109 views
How do I hide some of Input
I have a project with a friend, and we make some work in Mathematica. He is not very good at Mathematica, and I have made some long necessary formulas we need. I would like to show what I've made but ...
10
votes
3answers
374 views
Extract connected components from PNG image file and write to individual PNG files
Given the PNG image below with the three leaves in it, I'd like to extract each individual leaf and write it to its own PNG file, using Mathematica 9. Note that in the original image, the box bounding ...
27
votes
2answers
604 views
Playing with Matrix falling code in Mathematica
I was trying to create a Matrix falling code image with Mathematica. Here is my code:
...
6
votes
4answers
232 views
How to set Block local variables by code?
I need to create a user defined Block function where the Block variables values are defined by code. For example, imagine I have:
...
1
vote
2answers
365 views
Faster way to convert real strings into numbers [duplicate]
Working with big files, I have to convert some numbers that are in string format into real MMA numbers. I know that I can use ToExpression but it's slow when ...
4
votes
3answers
669 views
Lyapunov Exponent
Does anyone know a (simple) Mathematica code for computing the Lyuponov Exponent for the Rossler System?
Thank you
Rossler System:
...
3
votes
0answers
708 views
Eulerian Video Magnification with CurrentImage[] [closed]
I saw yesterday a post here in SE that I think was deleted. It was about the recently published MIT algorithm called "Eulerian Video Magnification for Revealing Subtle Changes in the World ACM ...
12
votes
2answers
392 views
How to perform fuzzy lookup between lists?
I have two big lists with 10,000 lines each, with product names from different databases. They have a lot of common products (50%), but they are not typed in the same way. For example there is one ...
7
votes
5answers
275 views
Making a table with elements like {10i+j, i, j}
Table[10i+j,{i,4},{j,3}] will generate a table that looks like this:
{{11,12,13},{21,22,23},{31,32,33},{41,42,43}}
I would like ...
6
votes
3answers
240 views
Composition of mappings not working as expected
I have two functions $f,g:\mathbb{R}^2 \to \mathbb{R}^2$ and I define a third one $h:\mathbb{R}^2 \to \mathbb{R}^2$ as the composition $$h(x,y) = g(f(x,y))$$
I'm trying to get this function into ...
2
votes
1answer
1k views
Mathematica code for Bifurcation Diagram
At the moment I am trying to construct a bifurcation diagram of the iterative function $f(x)=$ $ax-1.1975x^3$. I've scoured the internet for pre-made bifurcation diagrams and found many (mostly of the ...
4
votes
1answer
311 views
Tooltip for a ListPlot3D
I am getting stuck with figuring out how to use Tooltip for a ListPlot3D.
Basically I have a list of values for the 3D plot (no ...
28
votes
2answers
4k views
Image Shadow Removal in Mathematica
The task is:
Image shadow removal is an important topic in image processing. If you feel curious about it, you may take a look here, or just google for it image shadow removal
There are also a ...
