similar to: Fwd: from "table" to "dataframe"

Hi there, I have a two-entrance dataframe, and I would like generate a new dataframe with its frequency. I tryed this site<-rep(c("s1","s2","s3"),20) species<-rep(c("a","b","a","c","d"),12) df<-data.frame(cbind(site,species)) df2<-table(df) But when I convert df2 to data.frame I miss the

No, you do not necessarily need the XY coordinates. You can also use polygon (field, in your case) adjacency information. See Rogerson, Peter A. 2001. _Statistical methods for geography_. Thousand Oaks: Sage. You might also look at GeoDA, a free and soon-to-be open source spatial analysis package. For your application, it might be easier to use than R. Go to https://www.geoda.uiuc.edu/.

Hi all, I am a real novice to R. :) I am struggling with a problem for generating colored dendrogram. I have searched the R list and complied/collected a R code which can generated a colored dendrogram based on the rainbow color and 4x4 similarity matrix (say matrix:m). In this dendrogram, each leaf is colored differently. But, I do not want the leaf colored on a random basis. I want to assign

Dear all, I have a so large image (43,000 x 18,000 pixels) and I need clip this image with a smallest one (1000x1000 pixels). I can read the second image using rgdal package. But the first image can´t be read on my system because if memory limitation (I have about 2GB availabe). So I would like hear from you if anyone have some suggestin in this regards. I have also ArcGis 8.6 ans Erdas 8.3

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Hi there, I have a binary matrix (dim 100x100) filled with values 0 and 1. I need select a record "n" positions of that matrix when values are 1. How can I do that? Thanks for all, Miltinho Brazil --------------------------------- [[alternative HTML version deleted]]

Dear R-friends, I have to simple questions. First I would like to exclude some columns from a dataframe and after I need select rows that satisfy some conditions. My data frame looks like Region Species Bodysize Weigth Age Africa Sp1 10.2 20 2 Africa Sp2 12.2 12 2 Africa Sp3 15.3 18 3 Africa Sp4 11.5 40 4 Brazil Sp1 10.2 40 3 Brazil Sp2 22.2 32 2 Brazil Sp3 12.3

Dear all, Every time that I need to generate I plot output as figure I use something like png("myoutput.png") plot(rnorm(100)*1.0,col=4) points(rnorm(100)*0.5,col=2,pch=0) dev.off() But now I need to generate a lot of outputs and it could not be done in a for looping where I can change the names. So I would like to know if is there a way of I automatically redirect the output from my

Dear all, I have a dataset which I need to estimate the regression model and plot the estimated curve two other curves with low and high confidence interval (CI=95%). How can I do that? x<-1:100 y<-x^0.2+rnorm(100,0.1,0.1) mod<-glm(y~log(x)) plot(y~x) lines(predict(mod)~x,col=2) Kind regards, miltinho Brazil para armazenamento! [[alternative HTML version deleted]]

Hello All, I have two dataframes and I wish to insert the values of one dataframe into another (let's call them DF1 and DF2). DF1 looks like this: col1.....col2 a...........1 b...........2 c...........3 d...........4 e...........5 f............6 g...........7 where col1 (which is just the first column of the dataframe) is a list of characters and col2 is the numeric value associated with

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I want to do something like df[df$b %in% df2[i, 2], ] where df$b is a numeric vector and df2[i, 2] is a factor with levels like "7:9, 12:14". For example: a <- c(paste("A", 1:10, sep = ""), paste("B", 1:10, sep = "")) b <- 1:20 df <- as.data.frame(cbind(a, b)) df$b <- as.numeric(levels(df$b))[as.integer(df$b)] f <-

Dear all, I installed xlsReadWrite package under Windows 7, and got error when trying to run xls.getshlib(). Please, see the errors below: > require(xlsReadWrite) Loading required package: xlsReadWrite xlsReadWrite version (cran shlib) Copyright (C) 2010 Hans-Peter Suter, Treetron, Switzerland. !! Your installation contains the cran placeholder shlib (dll/so). Please get the regular shlib

Hi there, I´m trying to use "simecol" package but I got the error showed below. I´m runnig R version 2.4.0 (2006-10-03). Kind regards, miltinho Brazil --- > require(simecol) Loading required package: simecol Error in loadNamespace(package, c(which.lib.loc, lib.loc), keep.source = keep.source) : in 'simecol' methods specified for export, but

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Hola a todxs, No encuentro la manera de hacer algo que aparentemente parece muy sencillo: Tengo dos dataframe, en el primero tengo una serie de códigos con hora de inicio y hora de fin y en el segundo otros códigos asociados a una hora; Lo que necesito es crear una nueva variable en el segundo data frame que indique a qué intervalo del primer data frame (df1$id) pertenece cada nivel del segundo

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