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bio website rodrigomurta.com
location Brazil
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visits member for 2 years, 2 months
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abouteMe={physicist, data scientist, programmer, Lover of Science and Math}

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Nov
15
comment Ways to overcome failure of TextRecognize on relatively simple price tag?
Just by curious. Is this a real World problem? If yes, do you more sample tags? Do you need all the label texts?
Nov
11
comment How do I remove Wolfram Branding in a CDF?
@GustavoDelfino, they are working on it. CDF player 10 should have this and another nice news.
Nov
10
comment How to prevent Round with hided fractions
I use it to create a SQL insert statement, where numbers are rounded to prevent unnecessary file size. My insert get much more fast with this rounded "bulk" mechanist. I'll post a question/answer showing how it works, it's interesting to be shared.
Nov
10
comment How do you round numbers so that it affects computation?
@ChrisDegnen I'm using N@Round[100*4.811,1/100] to solve that. But take care with automatic Map compilation, details here: 65298
Nov
10
comment How to prevent Round with hided fractions
Tks @Mr.Wizard, but I need it as numbers. Now I'm using N@Round[4.811, 1/100]. I have some problems with automatic compilation, but now it's ok. OutputForm has problems with big numbers, and InputForm works just nice.
Nov
10
comment How to prevent Round with hided fractions
Yes, corrected myround to round. N@Round[4.811, 1/100] is much faster. tks +1
Nov
9
comment How do you round numbers so that it affects computation?
There are some problems with Round. For example, try Round[4.811] and you get 4.8100000000000005, not 4.81 as expected.
Nov
8
comment Using 0 to create new columns in a list with Part
Very interesting to know.
Nov
8
comment Using 0 to create new columns in a list with Part
Now I want to understand what kind of Black Mathic is this! How is this pure function actually working? Any link? +1
Nov
8
comment Using 0 to create new columns in a list with Part
Interesting point about PackedArrays. It would be nice if we could just use Null as list[[All, {1, Null, 2, 3}]], and keep it packed but it's not possible. Tks +1
Oct
29
comment Converting hierarchies of rules to associations
ToAssociations do not work for lists with RuleDelayed, I used you second method as Replace[rdata, x : {__RuleDelayed | __Rule} :> Association[x], {0, Infinity}]. Tks! +1
Oct
22
comment Running postgresql query with backslash
@OleksandrR. What is the Vertica connection string? It's native into Mathematica?
Oct
8
comment Can't Get BarChart to use ColorFunction
@eldo no problem
Oct
8
comment Can't Get BarChart to use ColorFunction
@Edmund not for that. Happy coding :)
Oct
8
comment Can't Get BarChart to use ColorFunction
Why downvote? Someone knows?
Oct
8
comment Can't Get BarChart to use ColorFunction
@eldo, it's a positive variation. So, it's green...
Oct
6
comment Bad performance from SubsetQ?
Tks for the explanation. An Hashed Operator form for SubsetQ (IntersectingQ and so on) would be really welcome.
Oct
6
comment Bad performance from SubsetQ?
@DanielLichtblau Tks.
Oct
4
comment StringCases is Confused with Patterns in Version 10.0.1
Same on OSX 10.9.4
Sep
30
comment How to build a bvh player in Mathematica?
The highest answer/question vote relation ever... +1