tag:blogger.com,1999:blog-37324607.post8522370383437188088..comments2019-08-21T05:37:59.839-04:00Comments on Data Mining in MATLAB: Logistic RegressionWill Dwinnellhttp://www.blogger.com/profile/03379859054257561952noreply@blogger.comBlogger23125tag:blogger.com,1999:blog-37324607.post-57074895355417337392018-08-30T07:01:21.110-04:002018-08-30T07:01:21.110-04:00We at COEPD provides finest Data Science and R-Lan...We at COEPD provides finest Data Science and R-Language courses in Hyderabad. Your search to learn Data Science ends here at COEPD. Here, we are an established training institute who have trained more than 10,000 participants in all streams. We will help you to convert your passion to learn into an enriched learning process. We will accelerate your career in data science by mastering concepts of Data Management, Statistics, Machine Learning and Big Data.<br /><br />http://www.coepd.com/AnalyticsTraining.htmlCoepdhttp://www.coepd.com/AnalyticsTraining.htmlnoreply@blogger.comtag:blogger.com,1999:blog-37324607.post-83746875854005410962017-01-11T01:29:04.718-05:002017-01-11T01:29:04.718-05:00For those asking, the MATLAB mnrfit function perfo...For those asking, the MATLAB mnrfit function performs multinomial logistic regression.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-37324607.post-34707910704680972862016-05-12T03:57:58.027-04:002016-05-12T03:57:58.027-04:00What is the best way in matlab to do a logistic re...What is the best way in matlab to do a logistic regression with more than 2 outcome categories? Dimitri Huwylerhttps://www.blogger.com/profile/17057704984175108213noreply@blogger.comtag:blogger.com,1999:blog-37324607.post-812804044672247412015-11-13T10:49:51.837-05:002015-11-13T10:49:51.837-05:00Thanks so much for the easy to understand explana...Thanks so much for the easy to understand explanations on fitting a logistic regression to the data! I will be checking your blog more often now for any matlab questions:)Irishttps://www.blogger.com/profile/13975161080054067941noreply@blogger.comtag:blogger.com,1999:blog-37324607.post-15883169119370374912015-06-15T15:58:36.390-04:002015-06-15T15:58:36.390-04:00Hello Mr. Dwinnell,
Thank you very much for your a...Hello Mr. Dwinnell,<br />Thank you very much for your article. I'm trying to perform logistic regression on financial data in context of my master degree and still not very clever with Matlab. I would like to know if it is possible to get all stats from a regression to assess the accuracy and validity of the model. I know the function "regstats" but it puts results in variables on the workspace. Is it possible to get a output with all main stats in a single windows to quickly assess the validity of the model? <br /><br />Thank you very much.<br />Gabrielgenetixx01https://www.blogger.com/profile/01680483775328181384noreply@blogger.comtag:blogger.com,1999:blog-37324607.post-76064518946998484362014-12-18T14:33:01.151-05:002014-12-18T14:33:01.151-05:00hi. i will use logistic regression but some of my ...hi. i will use logistic regression but some of my features are not numeric and even categorical. how can i use this classifier for these features. some features like: device_ip=0f201fe02milad mirzaeihttps://www.blogger.com/profile/13082895507002620096noreply@blogger.comtag:blogger.com,1999:blog-37324607.post-39117920615008787832014-12-09T17:13:54.863-05:002014-12-09T17:13:54.863-05:00The last statement
Z = Logistic(B(1) + X * (B(2)...The last statement<br /><br /> Z = Logistic(B(1) + X * (B(2)))<br /><br />produce an error<br /><br />Undefined function 'Logistic' for input arguments of type 'double'.Truthhttps://www.blogger.com/profile/04498000312729239150noreply@blogger.comtag:blogger.com,1999:blog-37324607.post-30370943979192835002014-09-25T11:29:50.213-04:002014-09-25T11:29:50.213-04:00Will, is there a benefit of logistic regression ov...Will, is there a benefit of logistic regression over LDA? How do you know which one to use?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-37324607.post-26705475096692074412013-09-25T16:13:18.743-04:002013-09-25T16:13:18.743-04:00Hi,
I was just wondering how can you get the accu...Hi,<br /><br />I was just wondering how can you get the accuracy of the model.<br />Thank you! Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-37324607.post-22012676575898797092013-04-23T01:27:47.675-04:002013-04-23T01:27:47.675-04:00is there a simple was of determining the inflectio...is there a simple was of determining the inflection point? I have been searching for this all day...Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-37324607.post-26665508220871836652012-12-08T19:22:04.946-05:002012-12-08T19:22:04.946-05:00This article helped me to understand some of the b...This article helped me to understand some of the basics of logistic regression, but I am confused about one thing, through glmfit, a model is found that fits the data, am I right?<br /><br />And the next question, that I am planning to use this as classifier but I am not sure that how can I test my examples i.e. how would the classifier would predict the class? Is there any Matlab function available for this?<br /><br />Regards,<br />ml learnernoreply@blogger.comtag:blogger.com,1999:blog-37324607.post-49144538480724719232012-11-09T15:16:06.056-05:002012-11-09T15:16:06.056-05:00Thanks for such a post...Thanks for such a post...vinkal vishnoihttps://www.blogger.com/profile/04080941522558322555noreply@blogger.comtag:blogger.com,1999:blog-37324607.post-88203339149279032052012-09-07T10:10:45.501-04:002012-09-07T10:10:45.501-04:00This comment has been removed by the author.msuzenhttps://www.blogger.com/profile/06434797231632063088noreply@blogger.comtag:blogger.com,1999:blog-37324607.post-73452996027488708632012-09-07T10:10:12.451-04:002012-09-07T10:10:12.451-04:00Z can also be obtained via :
>> glmval(B, ...Z can also be obtained via : <br /> >> glmval(B, X, 'logit')msuzenhttps://www.blogger.com/profile/06434797231632063088noreply@blogger.comtag:blogger.com,1999:blog-37324607.post-73967878879208832072012-05-19T06:44:29.553-04:002012-05-19T06:44:29.553-04:00glmfit is provided in the Statistics Toolbox, whic...<i>glmfit</i> is provided in the Statistics Toolbox, which is an add-on product from MATLAB's vendor, the MathWorks.<br /><br />At the MATLAB command line, try typing <i>help glmfit</i>. If MATLAB doesn't know what you're talking about, an error message will come back because you don't have this Toolbox installed.Will Dwinnellhttps://www.blogger.com/profile/03379859054257561952noreply@blogger.comtag:blogger.com,1999:blog-37324607.post-88170728762298045732012-05-18T15:33:10.186-04:002012-05-18T15:33:10.186-04:00Hi, I am really new in this area and I just starte...Hi, I am really new in this area and I just started to learn MatLAb yesterday in order to perfor logistic regerssion. I don't understand how to define the function glmfit. Could you please help me with that.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-37324607.post-52011579512032299782012-05-04T10:48:15.114-04:002012-05-04T10:48:15.114-04:00Hey there,
thanks a lot for your blog entry, it r...Hey there, <br />thanks a lot for your blog entry, it really helped me a lot!Dosnhttps://www.blogger.com/profile/07263687761084761934noreply@blogger.comtag:blogger.com,1999:blog-37324607.post-44364041365382013472010-01-22T10:20:07.567-05:002010-01-22T10:20:07.567-05:00Ctraft: I believe you're referring to multino...Ctraft: I believe you're referring to multinomial logistic regression, which is a separate function.eyeballjunkhttps://www.blogger.com/profile/17241592237741377415noreply@blogger.comtag:blogger.com,1999:blog-37324607.post-52553299757838373502009-11-11T05:08:23.325-05:002009-11-11T05:08:23.325-05:00Is there a way to perform multiple logistic regres...Is there a way to perform multiple logistic regression in Matlab, using multiple, maybe 3 or 4 variables at a time?CTrafthttps://www.blogger.com/profile/02262341802849687210noreply@blogger.comtag:blogger.com,1999:blog-37324607.post-38599436702596765482009-06-02T17:15:19.423-04:002009-06-02T17:15:19.423-04:00And what about likelihood estimates? Chi^2? AIC?...And what about likelihood estimates? Chi^2? AIC?eyeballjunkhttps://www.blogger.com/profile/17241592237741377415noreply@blogger.comtag:blogger.com,1999:blog-37324607.post-19459775662074899822009-04-02T23:24:00.000-04:002009-04-02T23:24:00.000-04:00Back 20 years ago, when I worked at Barron Associa...Back 20 years ago, when I worked at Barron Associates, Inc. in Virginia, Andrew Barron created a simple way to build multiple logistic regression models (M-1 models, where M is the number of levels of the target variable), and then compute the probability of each outcome, The Mth probability is just 1 - SUM(all other probs). So in Matlab, I think this would just require an outer loop and then scaling on the back end.<BR/><BR/>By the way, these were fun times--John Elder was there at Barron Associates, as was Paul Hess (co-founder of AbTech Corp.).Dean Abbotthttps://www.blogger.com/profile/16818000233889520746noreply@blogger.comtag:blogger.com,1999:blog-37324607.post-85561039386777071532009-04-01T18:17:00.000-04:002009-04-01T18:17:00.000-04:00That's a good question.I'd like to see support (ev...That's a good question.<BR/><BR/>I'd like to see support (even if it required using multiple dummy variables) for multi-class logistic regression in the Statistics Toolbox.Will Dwinnellhttps://www.blogger.com/profile/03379859054257561952noreply@blogger.comtag:blogger.com,1999:blog-37324607.post-78291450842773277162009-04-01T17:01:00.000-04:002009-04-01T17:01:00.000-04:00I never understood why there is no support for cla...I never understood why there is no support for class/level variables in General Linear Model estimation (glmfit function). I currently resort to SAS for doing this type of analysis.<BR/>There is a MATLAB toolbox called GEEQBOX (http://www.jstatsoft.org/v25/i14/paper), which at least has the possibility to account for repeated measurements (GEE), but still it accepts only numeric data in the predictor variables.Keeshttps://www.blogger.com/profile/13865650396598570288noreply@blogger.com