"That is a very nice article. Thanks for sharing."
Neeraj Sharma's Discussions
Alternate of gradient descent
Started this discussion. Last reply by Neeraj Sharma Sep 16. 8 Replies 2 Likes
Hi Everyone,Recently i gave an interview for data science opening and interviewer asked optimisation algorithm for logistic regression. I answered gradient descent and explained same.He said these…Continue
Tags: algorithms., optimisation, regression, logistic, datascience
Face detection - Get duration of people glimpse on an advertisement
Started this discussion. Last reply by Anand.M Jul 19. 2 Replies 0 Likes
Hi,I used Haar cascade to detect faces on camera.It gives back coordinates of rectangles where face is detected.I saved the data along with time stamp in below manner:2018-07-04…Continue
Tags: Cascade, Haar, Processing, Image
Add column values as new row conditionally
Started this discussion. Last reply by Neeraj Sharma Mar 22. 1 Reply 1 Like
I csv data file in below format:1:1011022:1031041053:106107I want result as below in RValue id101 1102 1103 2104 2105 2106 3107 3I did…Continue
Analysis of survey conducted on grocery store customers
Started Feb 24 0 Replies 0 Likes
I have given a survey conducted on customers of grocery shop. This grocery shop has sensors which keeps track what items i picked and will be billed accordingly on exit of store app.Survey conducts…Continue
Gifts Received
Neeraj Sharma has not received any gifts yet
Neeraj Sharma's Page
Latest Activity
Karthik PG replied to Neeraj Sharma's discussion Alternate of gradient descent"I don't agree with the interviewer fully. ADAM, ADAGRAD,SGD are some of the popular ones used in solving real world problems when employing regression (of any kind) techniques...May be there is a specific problem he has in mind...."
Neeraj Sharma replied to Neeraj Sharma's discussion Alternate of gradient descent"I also think so will try to compare both stochastic and swarm. Thanks"
Neeraj Sharma replied to Neeraj Sharma's discussion Alternate of gradient descent"Thanks Vincent will try to implement and replace with gradient descent."
Eduardo Di Santi replied to Neeraj Sharma's discussion Alternate of gradient descent"I think the interviewer its confused ... Stochastic gradient descent is heavily used and its the "de facto" method for learning
Of course there are very good alternatives like Swarm optimization, but I will not say that nobody use SGD…"
surya prakash Sahu replied to Neeraj Sharma's discussion Alternate of gradient descent"I think the interviewer was looking for some variation of gradient descent, because according to my knowledge gradient descent is used and used heavily; but with some tweaks. Check this momentum-rmsprop-and-adam, it'll give the idea."
Matt Wenham replied to Neeraj Sharma's discussion Alternate of gradient descent"Genetic Algorithms may also be of interest. In general, the problem domain is that of Global Optimization."
Vincent Granville replied to Neeraj Sharma's discussion Alternate of gradient descent"Here is a great alternative: swarm optimization, see https://www.datasciencecentral.com/profiles/blogs/swarm-optimization-goodbye-gradients
The animated picture below shows how it works:"
Neeraj Sharma's discussion was featuredAlternate of gradient descent
Hi Everyone,Recently i gave an interview for data science opening and interviewer asked optimisation algorithm for logistic regression. I answered gradient descent and explained same.He said these days nobody use gradient descent? Is that true and if yes what are alternatives.What are disadvantages of gradient descent because of which it is not used anymore?Thanks for your help in advance.See More
Neeraj Sharma posted a discussionAlternate of gradient descent
Hi Everyone,Recently i gave an interview for data science opening and interviewer asked optimisation algorithm for logistic regression. I answered gradient descent and explained same.He said these days nobody use gradient descent? Is that true and if yes what are alternatives.What are disadvantages of gradient descent because of which it is not used anymore?Thanks for your help in advance.See More
Anand.M replied to Neeraj Sharma's discussion Face detection - Get duration of people glimpse on an advertisement"What does the time stamp say? when the face was detected on camera? if so
do you have data on when the face got undetected from the time it got detected? this might give you the duration the face was in camera.
With this maybe you can assume the…"
Matt Tucker replied to Neeraj Sharma's discussion Face detection - Get duration of people glimpse on an advertisement"Hi Neeraj,
Looks like a great start!
You can use a motion tracking solution such as this one: https://github.com/bendidi/Tracking-with-darkflow with a few customizations to output how many people and for how long where watching the…"
Neeraj Sharma posted a discussionFace detection - Get duration of people glimpse on an advertisement
Hi,I used Haar cascade to detect faces on camera.It gives back coordinates of rectangles where face is detected.I saved the data along with time stamp in below manner:2018-07-04 12:36:09.150689,145,278,419,4192018-07-04 12:36:09.550856,56,232,218,2182018-07-04 12:36:09.550950,230,255,416,4162018-07-04 12:36:09.924459,322,243,393,3932018-07-04 12:36:09.924575,635,449,184,1842018-07-04 12:36:10.274188,396,228,393,3932018-07-04 12:36:10.608793,452,214,401,401Now i want to get some pattern through…See More
Neeraj Sharma replied to Neeraj Sharma's discussion Add column values as new row conditionally"Let me answer myself in case if some one else face the same issue :)
df <- data_frame(text=junk) df %>% separate_rows(text, sep = '\n') %>% filter(text != "") %>% extract(text, into = c('group'), regex…"
Profile Information
- Short Bio
- Working till now on JAVA but very much passionate for data analysis. From last 8 months going through various courses for data science. Trying hard to work full time on data analysis.
- My Web Site Or LinkedIn Profile
- http://https://www.linkedin.com/in/neeraj-sharma-00788ba/
- Professional Status
- Technical
- Years of Experience:
- 10
- Your Company:
- Cisco
- Industry:
- Software
- Your Job Title:
- SE III
- How did you find out about DataScienceCentral?
- via articles posted on Linked In
- Interests:
- Finding a new position, Networking, New venture
- What is your Favorite Data Mining or Analytical Website?
- http://www.datasciencecentral.com/,https://www.r-bloggers.com,https...
- What Other Analytical Website do you Recommend?
- http://https://www.datascienceweekly.org/
Comment Wall
- No comments yet!
© 2018 Data Science Central ®
Powered by
Badges | Report an Issue | Privacy Policy | Terms of Service
