Amelie LESCROEL wrote: > Hello, > > > > Could someone explain to me why I get so different histograms, in terms of > bar spacing, depending on the number of counts entered ? (see example below) > > > >> test <- c(0,1,1,1,1,0,0,0,0,0,2,3,2,2,2,3,3,4,5,6,7,5,4,3,4,2,2) > >> hist(test) > > > > I obtain this kind of histogram (what I actually want), i.e. large bars with > no space between them > > > > x > > xx > > xxx > > xxxx > > xxxxx > > xxxxxx > > xxxxxxx > > xxxxxxxxx > > xxxxxxxxxx > > > > Entering: > >> test <- > c(3,1,2,1,1,1,2,1,1,2,2,2,0,1,1,1,3,0,0,2,5,2,0,0,1,6,0,1,1,4,0,0,2,1,0,1,3, > 0,0,0,3,2,1,3,6,3,1,0,1,0,1,0,1,0,0,4,1,3,2,7,5,1,0,0,1,2,0,2,0,2,0,2,1,1,3, > 1,3,0,2,1,3,1,1,0,1,7,2,1,2,2,2,1,2,5,1,2,2,2,1,1,4,2,0,4,1,1,1,5,1,0,2,5,2, > 1,1,1,1,2,1,1,1,1,4,2,1,3,1,1,2,4,2,1,1,1,1,1,1,1,1,1,4,1,0,2,2,5,1,4,0,1,2, > 2,2,2,1,2,1,3,5,2,0,0,2,0,0,0,0,1,1,2,2,1,1,2,1,0,1,0,2,1,3,0,0,0,1,3,1,3,1, > 0,3,1,2,0,1,1,1,3,4,4,2,1,1,1,2,1,2,2,5,1,1,1,1,1,2,0,1,3,1,1,2,3,1,1,2,0,0, > 2,0,1,1,1,1,1,1,1,1,1,1,5,3,1,1,1,0,0,1,0,1,1,0,0,1,2,0,0,0,2,3,1,1,1,2,0,0, > 0,0,0,0,0,0,0,0,0,0,0,0,1,1,2,0,1,0,0,0,1,3,0,1,3,1,2,1,1,2,1,1,3,1,1,1,0,0, > 1,1,1,1,1,1,1,1,4,1,3,3,1,2,1,2,3,4,1,0,2,2,1,2,1,2,3,0,0,2,3,2,4,1,0,1,1,0, > 1,3,2,3,3,1,3,1,0,2,1,1,1,1,1,1,3,0,0,1,1,1,1,1,1,3,1,3,3,0,1,2,1,2,3,1,2,1, > 2,2,2,1,1,1,1,0,2,2,1,2,2,2,1,1,2,2,1,1,1,2,2,1,1,1)
You data follows a *discrete* distribution, hence a barplot seems to be more appropriate here: barplot(table(testtest)) Uwe Ligges >> hist(test) > > > > I obtain a strange histogram with the first 2 bars grouped together and then > thin bars (not occupying the entire bin width) separated by spaces. > > > > x > > x x > > xx x > > xx x x > > xx x x x > > xx x x x x > > xx x x x x > > xx x x x x x > > xx x x x x x x > > xx x x x x x x x x > > > > I suspect that it’s causing me some troubles to fit my data to a probability > density function. Using: > > > >> plot(density(test)) > > > > I got a “wave-shaped” density line, with the line going down to zero between > each bar. And I wouldn’t expect the density line to go down between each > integer… or surely there is something that I don’t understand! > > > > Thanks for your help, > > > > Amélie Lescroël > > > > > > > > > [[alternative HTML version deleted]] > > > > ------------------------------------------------------------------------ > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
