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Philip Durbin
@pdurbin
heh
Alice Jiang
@becausealice2
if anyone is looking for free data, I've just discovered the Food and Agriculture Organization of the United Nations' FAOSTAT and OHMYGOD so much information
(in case it needs to be stated explicitly, it's all agricultural-related data)
ruitoantunes
@ruitoantunes
Hi
ruitoantunes
@ruitoantunes
i'm starting programming in php and would like to have some support on the php code
Alice Jiang
@becausealice2
@ruitoantunes I don't know that many people here would be able to help with PHP, it's not a very common language in Data Science. Perhaps if you share a code snippet someone could have a look?
ruitoantunes
@ruitoantunes
Ok thanks.
Sakitha
@Sakitha
Hi, does apply in df.apply(fun) iterate over each columns in 'df' data-frame and pass them to 'fun' function as a series?
Eric Leung
@erictleung
@Sakitha hi there! What language and package are you working with? I'm assuming Python and pandas but just wanna be sure.
Alice Jiang
@becausealice2
@Sakitha :point_up: making that same assumption, yes. Each column is passed as a Series object to fun
Philip Durbin
@pdurbin
I like the sound of apply(fun)
Alice Jiang
@becausealice2
I wonder what that does :weary:
I shouldn't be so dramatic :laughing:
Philip Durbin
@pdurbin
:)
Atharva Kulkarni
@IronVenom
hello
Eric Leung
@erictleung
@IronVenom hello and welcome! :smile:
abraham anak agung
@padunk
hello, anybody here? :smile:
Philip Durbin
@pdurbin
Some of us are here. :) What can we do for you?
abraham anak agung
@padunk
@pdurbin It is ok, SO to the rescue :smile: . Just confuse why np.std() return different value compare to pandas std.
Philip Durbin
@pdurbin
np is numpy, I assume
Sundeep
@pidugusundeep
Hey
Anu-Pra
@Anu-Pra
Hey
Is anyone interested in forming a study group for learning P1xt Data Science guide?
I need a study partner
Eric Leung
@erictleung
@padunk if you remember, what is the difference between np.std() and pd.std()? I'd like to know :smile:
@pidugusundeep hello!
@Anu-Pra I don't think I have the bandwidth to join, but feel free to use this space to bounce ideas! People around here have a range of expertise, but we're all interested in learning as well. Questions you may have while going through the guide are probably general enough for us to answer.
Eric Leung
@erictleung

For those who use R and the tidyverse, tidyr has been updated to 1.0.0! https://www.tidyverse.org/articles/2019/09/tidyr-1-0-0/

Some notable updates:

  • New pivot_longer() and pivot_wider() provide improved tools for reshaping, superceding spread() and gather(). The new functions are substantially more powerful, thanks to ideas from the data.table and cdata packages, and I’m confident that you’ll find them easier to use and remember than their predecessors.
  • New unnest_auto(), unnest_longer(), unnest_wider(), and hoist() provide new tools for rectangling, converting deeply nested lists into tidy data frames.
  • nest() and unnest() have been changed to match an emerging principle for the design of ... interfaces. Four new functions (pack()/unpack(), and chop()/unchop()) reveal that nesting is the combination of two simpler steps.
  • New expand_grid(), a variant of base::expand.grid(). This is a useful function to know about, but also serves as a good reason to discuss the important role that vctrs plays behind the scenes. You shouldn’t ever have to learn about vctrs, but it brings improvements to consistency and performance.
Alice Jiang
@becausealice2
@padunk Different denominators. Have a look at this
Anu-Pra
@Anu-Pra
Thank you @erictleung . Together we all grow!
Eric Leung
@erictleung

So Google's gonna be Google. I was skimming through Google's AI blog (highly recommended btw) and was reading about some new neural networks, namely "weight agnostic neural networks" or WANNs https://ai.googleblog.com/2019/08/exploring-weight-agnostic-neural.html

So traditionally, you'll need to design the architecture of neural networks (i.e., how many layers, the connections, how many nodes, etc). These WANNs are apparently a way to use automation and have the computer find out which architectures work the best. It is a fascinating thing to think about.

Anandesh Sharma
@Anandesh-Sharma
Hey guys welcome me!
londheshubham
@londheshubham
@erictleung Great find buddy, will surely go through it!
Eric Leung
@erictleung
@Anandesh-Sharma welcome!
TJ-coding
@TJ-coding
hello
Anandesh Sharma
@Anandesh-Sharma
@erictleung Thank you
Alice Jiang
@becausealice2
Have you guys seen this yet?
Eric Leung
@erictleung
@becausealice2 oh man, the box surfing strategy got me laughing so hard :laughing: All this reminds me of the Infinite monkey theorem where a monkey given enough time can type out Hamlet https://en.m.wikipedia.org/wiki/Infinite_monkey_theorem Although those free agents aren't given explicit instructions, they are able to "learn" after millions of iterations. It almost seems inevitable for the computer to eventually find an optimal strategy.
Alice Jiang
@becausealice2
Box surfing nearly knocked me out, as well, but the agents were so cute I was honestly laughing the whole time
jaimecuellar14
@jaimecuellar14
Hey there, I was looking for someone to help me understand some things about deep learning
for semantic segmentation
Alice Jiang
@becausealice2
@jaimecuellar14 I don't know that we have any one person who can help but if you ask we might be able to find you an answer
jaimecuellar14
@jaimecuellar14
I have a set of pictures and their mask and also a file containing like the percentage of items in the masks for example lets say chair: 38%, i have made a model (bad one 60% acc) but i am have to give as an answer like img_predicted.png chair:10%, table:40% and i have no idea on how to do this, and also how to improve my model
i am really new to this
Nao
@Ngoldberg
Is anyone on that could is familiar with manipulating data, like dealing with databases, dbf files, free tables. I could use some brainstorming help :)
Eric Leung
@erictleung
@Ngoldberg I don't have experience with dbf files specifically, but I've manipulated my fair share of data in R. What kind of questions do you have?
@jaimecuellar14 I don't have any experience with semantic image segmentation, but happy to brainstorm/debug your issues. Have you seen this document? http://blog.qure.ai/notes/semantic-segmentation-deep-learning-review It seems like it might be of use.
Pedro Henrique Braga da Silva
@pedrohenriquebr
Hi there
I would like to know the best DBSCAN variant algorithms
Eric Leung
@erictleung
@pedrohenriquebr I'm somewhat familiar with DBSCAN, but not its variants. Is DBSCAN not sufficient for your work?