search for: jbustosmelo

Hello everyone, I want make a variable selection  from a dataframe, but when I build this new object (using cbind) the new table (which is a matrix) I lost all the original factor names in the variables. I get 1,2,3.... Someone would be so kind and tell me if there's is a ny way to get variables in a dataframe, but not changing these factor to numbers? Thank you all. José [[alternative

 Hello everyone, I'm trying to change the name variables of a big dataset. Here's more than 300 variables. The point is that I have to match it with another dataset that have same variables, but in lowercase, the I can use rbind and do my work. Is there any function for changing uppercase or lowercase variables? Thank you in advance! José [[alternative HTML version deleted]]

Hello everyone,  There's something really important about climate change and how many institutions around the globe are looking for softwares solutions in order to achieve they (and everyone) needs to improve life conditions in all the planet. Currently, they're many comercial softwares working with this important topic named as: "Life Cycle Assesment", monitoring carbon emition,

Hello Everyone, I'm doing a Classification trees with categorical explanatory variables using library rpart and I would like to do a prediction for some data imputs. I don't know where's a function or how can I do it?. Is there someone can help ?? ¿. Here's the code that I'm using. library(rpart) fit <- rpart(Kyphosis ~ Age + Number + Start, data=kyphosis) plot(fit)

Hola everyone, I'm doing an analisys about abundance of a planctonic specie in Robinson Crusoe Islan and I am having a hard time just adding the superscripts and the 100 (one hundred) in the measure of abundance. Perhaps this is so basic to you, but I need to put the real unit of measure. Individuals / 100 cubic meters. I have been looking in websites and R-list and there is not any

Hello everyone,  I'm working in a project to create an special analysis about visualization in some animals and its behaviour, through checking eye movement. The point is this is very important to get data from the image as a resume of what this animal sees. I think an RGB histogram like photoshop does, but I need to get the data from this histogram analysis and I was wondering about using R

Hello everyone, I know this is very basic question for you people. I'm working with mani diferent tables, but everyone has the same variables. (V1, V2, V3). The only think that I need to do is to put together this tables. In other words, creating just one big table with all the cases showed in the smaller tables. For example: tabla1<-data.frame(v1,v2,v3) tabla2<-data.frame(v1,v2,v3)

Hi everyone, I'm trying to reduce the font size in the Y  exe in this plot: http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=150 Anyone knows how to do it? I have checked the argument lab.cex and cex, but any of these works! if you want to check us this code: ### read the data d <- read.csv( file( "http://addictedtor.free.fr/graphiques/data/150/data.txt" ) )

Dear R users.   I'm trying to know how to create a function. I have developed a big code that use a file and makes many process and then creates a table that is exported as txt. The point is to make something like a function.  I need to make it easy for others, so they can run it. This has a particular name? I will be very gratefull and placed if any of you can provide some lights.

Hello R-List, I have a question about recoding from a date time object.  I have tried using as.POSIXct objects and Chron Objects, but I can get the what I want. I need to create a new variable from a date-time object, adding "Office Time" for those events that happens between 08:00:00 to 18:00:00 and "Out of Office" all the others, but not including weekends. I have created a

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Estimados, A todos quienes estan insterados y estan en Stgo de Chile les tengo una muy buena noticia. Desde hace ya algunas semanas, nos hemos sentado a la mesa con Alex (Epidemiologo) a discutir la necesidad de desarrollar un curso de R para principiantes. No solo porque es necesario unirse en torno a un projecto como es el R, sino que es una oportunidad para muchos cientificos (como

Hi all..RCounters! I´m working with standarized time series, and i need make a counter of consecutives positves numbers to make a cumulative experimental funtion. I have x: the time series (0,1) and y: my counter, i have this for step. What is wrong?.. any can help me please! x<-rbinom(15,1,.3) y<-NULL;s<-0 for (i in 1: length (x)) {if (x[i]>0) {s<-s+x[i] s=0}

Hi everyone, I would like to improve my plot and I was wondering if someone can help me whith it. I'm trying this plot using two groups, but I want to choice the colors (the black and white circles) but I don't know how to change it from here. These are my sentences: myplot3d<- scatterplot3d(myfile$Temperature, acantarcthus$Salinity,myfile$Abundance, type="h",    color =

hi all members, please, i need you help... now a i´m working with veronoi polygons in a area with projections, but i need cut the polygons left. On other words, i need cut the polygons in the worked area. R help say that use the command voronoi.findrejectsites, but in this command i need put the numbers, any way...this command not cut!! do you can help me? Thank you for help me! José Bustos

Estimados, A todos quienes estan insterados y estan en Stgo de Chile les tengo una muy buena noticia. Desde hace ya algunas semanas, nos hemos sentado a la mesa con Alex (Epidemiologo) a discutir la necesidad de desarrollar un curso de R para principiantes. No solo porque es necesario unirse en torno a un projecto como es el R, sino que es una oportunidad para muchos cientificos (como

Hello everyone, I working in a public health project and we have created a Decision Tree for categorical variables usign the package rpart. Our goal is to develop a model (Using the ROC tool) in order to predict presence/ausent of  diabetes and get a better understanding  of what are the important factors in a particular chilean population.  There are some importants variable that we have found. 

Hello everyone, I working in a public helath project and we have created a Decision Tree for categorical variables usign the package rpart. Our goal is to develop a model in order to predict presence/ausent of a diabetes and get a better understanding  of what are the important factors in a particular chilean population.  There are some importants variable that we have found.  Now we want to

Hello everyone, I would like to create a new R mirror en Chile and I would be very placed if any of you who are familiar doing it can help us. We are looking for manuals and materials need it. Thank you in advance, José Bustos Data Scientist at www.aespro.cl [[alternative HTML version deleted]]

I'm trying to use a data base from SPSS and get all data representing the true data. I would like to use a variable as expansion data. In our data base we have the variable with the factor expansion, but we have not idea how to set it in R. Any idea? Thanks in advance! José [[alternative HTML version deleted]]