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How to manipulate the cost function in SVM in R
@pagal_guy wrote: Hello, In case when a slack variable is used to create a soft margin to penalize for errors,a wider margin increases the cost function and hence a narrower margin is better,??How do...
View ArticleApplication of R Language in Projects in India
@Ram_Marthi wrote: Hello All, This is Ram. I did BTech (Mech)., + PGDM(Fin.&Marketing), with 5 Years of experience as Sales Engineer.As I found it interesting to work with statistics and R...
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What does the Kappa statistic measure?
@pagal_guy wrote: Hello, Pasted image620x560 51.2 KB In the above image:Though the accuracy is quite high the balanced accuracy and Kappa value are low.What does Kappa capture??Also how is this...
View ArticleWhat is the difference between bagging of decision trees and random forest
@pagal_guy wrote: Hello, Random forests and bagging both ensemble trees,but sometimes bagging gives a better result than random forests and some times it is the reverse.Both are creating ensembles of...
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How do I implement knn using errorest in the ipred package in R
@pagal_guy wrote: Hello, Pasted image516x593 52.9 KB In the above image I am trying to compare various classification algorithms on a dataset.I have implemented ctree,naive bayes,svm and random...
View ArticleHow R creates levels of a character variable?
@harry wrote: I have seen that whenever there is a character variable in the data, R divides that variable into levels and called a factor variable.I want to know how R creates that variable into...
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How does the variance-bias tradeoff in ensembles work
@pagal_guy wrote: Hello, While learning about ensembles I understood that for effective ensembling,the base learner/s should have low bias and high variance.1.Why is this the optimal situation?2.What...
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How to resolve NA error while using svmbag in R
@pagal_guy wrote: Hello, I am trying to do bagging of SVM's using the caret,kernlab and ipred libraries in R.My code is: bagctrl <- bagControl(fit = svmBag$fit, predict = svmBag$pred, aggregate =...
View ArticleWhat percentage of training data should be used for testing of a model?
@hinduja1234 wrote: I am currently solving one classification problem in which there are 235 rows and 51 columns.I want to know what percentage of rows I should use for training of my model and what...
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How to plot vertical and horizontal bars in different plots?
@sid100158 wrote: I am currently trying to plot a bar plot of a series in ipython notebook .data = Series(np.random.rand(16), index=list('abcdefghijklmnop'))data.plot(kind='bar', color='k',...
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How to create stack of bar plot in python?
@sid100158 wrote: I am currently learning about plotting of bar plots in python . I have created a Data frame and plot it to get a bar plot. But I want to know how to create the stack of bar plot . df...
View ArticleGREAT LAKES BUSINESS ANALYTICS Certificate Program
@rockky wrote: Hi Need inputs, thoughts about new program from 'GREAT LAKES BUSINESS ANALYTICS Certificate Program', link :GREAT LAKES BUSINESS ANALYTICS Certificate Program7 This is Online Program...
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How many columns should be used in dummy coding & one hot encoding in Python
@pagal_guy wrote: Hello,, While reading today's article on dealing with categorical variables,I read about the dummy coding example given:I think that the sex_female and sex_male columns are both...
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Sas line chart and graph
@sanchi_singh1 wrote: Respected Sir,Please see the following sample data... in excel i can easily segregate the data month wise with corresponding sum of amount(using pivot) and make its chart but in...
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Sas gchart graphs
@sanchi_singh1 wrote: Respected Sir,I want to make a graph of amount vs week_day but its not apperaing correctly ..please tell me whats the mistake and how can i make this graph more...
View ArticleR production confusion
@ParindDhillon wrote: Hi everyone, I am working on predictive analytics in my current company where we do lot of descriptive analytics on various graphs using bigquery. How can I show my predictive...
View ArticleWhat are some techniques of hypothesis testing for model building?
@hinduja1234 wrote: I am currently solving one classification problem in which I am trying hypothesis testing for variable significances.I have currently used two hypothesis techniques t-test - used...
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How to plot kernel density plot on a given histogram plot?
@sid100158 wrote: I am currently trying to plot a density plot from a given histogram plot.Density plot- Is formed by computing an estimate of a continuous probability distribution that might have...
View ArticleWhat value of information value should be select for modeling?
@hinduja1234 wrote: I am currently solving one classification problem in which I am using logistic regression algorithm for building my classification model. For the variable selection, I am currently...
View ArticleHow to install xgboost package on x32 bit windows for python?
@munitech4u wrote: Hi, I am using anaconda and need to install xgboost package, as it is not preinstalled.I tried method described on github: https://github.com/dmlc/xgboost/tree/master/windows, with...
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