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11 results for “from:Joao Azevedo”

Different level set when predicting with e1071's Naive Bayes classifier
Joao Azevedo · Jul 6, 2012 · r-help

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Different level set when predicting with e1071's Naive Bayes classifier
Joao Azevedo · Jul 5, 2012 · r-help

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VennDiagram
João Azevedo Patrício · Aug 26, 2014 · r-help

Em 26-08-2014 09:30, Jurgens de Bruin escreveu: > Hi, > > I am new to R and dont use it very often so I would appreciate some help. > > I would like to create a VennDiagram based on the following, I...

Understanding the intercept value in a multiple linear regression with categorical values
Joao Azevedo · Jul 27, 2012 · r-help

Hi! I'm failing to understand the value of the intercept value in a multiple linear regression with categorical values. Taking the "warpbreaks" data set as an example, when I do: > lm(breaks ~ wool, data=warpbreaks) Call: lm(formula = breaks...

Transform a data.frame with "; " sep column and another one in a a new one with the same two column but with repetitions
João Azevedo Patrício · Jul 4, 2014 · r-help

Hi, I've been trying to solve this issue but with no success. I have some data like this: 1 > TC WC 2 > 0 Instruments & Instrumentation; Nuclear Science & Technology; Physics, Particles & Fields; Spectroscopy 3 > 0 Nanoscience & Nanotechnology; Materials Science, Multidisciplinary...

Transform a data.frame with "; " sep column and another one in a a new one with the same two column but with repetitions
João Azevedo Patrício · Jul 4, 2014 · r-help

Em 04-07-2014 15:15, arun escreveu: > > Hi, > Try: > dat1 <- read.table(text="'1 > TC' 'WC' > '2 > 0' 'Instruments & Instrumentation; Nuclear Science & Technology;Physics, Particles & Fields; Spectroscopy' > '3 > 0' 'Nanoscience & Nanotechnology; Materials Science,Multidisciplinary; Physics, Applied' > '4 > 2' 'Physics...

Understanding the intercept value in a multiple linear regression with categorical values
Joao Azevedo · Jul 27, 2012 · r-help

Hi! Thanks for the link. I've already stumbled upon that explanation. I'm able to understand how the coding schemes are applied in the supplied examples, but they only use a single explanatory variable. My problem is with understanding...

Transform a data.frame with "; " sep column and another one in a a new one with the same two column but with repetitions
João Azevedo Patrício · Jul 7, 2014 · r-help

Em 05-07-2014 03:35, John McKown escreveu: > On Fri, Jul 4, 2014 at 7:50 AM, Jo?o Azevedo Patr?cio > <joao.patricio at gmx.pt> wrote: >> Hi, >> >> I've been trying to solve this issue but with...

Understanding the intercept value in a multiple linear regression with categorical values
Joao Azevedo · Jul 29, 2012 · r-help

Hi! You're right. I was misinterpreting the way the coefficients were calculated. Reading about the method of least squares helped me in clarifying some of my doubts. Thanks for your tips! -- Joao. On Fri, Jul 27, 2012 at 2...

Use of different colours in plot
João Azevedo Patrício · Jul 18, 2014 · r-help

Em 18-07-2014 08:07, Stefano Sofia escreveu: > Dear R list users, > I have a data frame called catchment like > > "year" "season" "rainfall" "colour" > 1953 1 409.5 "black" > 1953 2 145.3 "black" > 1953 3 285.6 "red...

Transform a data.frame with "; " sep column and another one in a a new one with the same two column but with repetitions
João Azevedo Patrício · Jul 9, 2014 · r-help

Em 05-07-2014 00:43, John McKown escreveu: > I messed up my original response by not including r-help in the > distribution. And now I won't look as bad because, after a short nap, > I have new, much...

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