2012-07-17 11 views
5

Ho una serie di coordinate x ed y che hanno ciascuno una distanza ad essi. Vorrei creare una mappa termica che mostri la distanza media per ogni punto all'interno delle gamme x e y come una mappa di calore. Poiché i punti non sono distanziati uniformemente l'uno dall'altro in una forma reticolare, il metodo richiederebbe un qualche tipo di funzione che raggruppa i dati e calcola la media per ciascun punto zona di levigatura e quindi rappresentare tale media con un colore.Creazione di una mappa di calore continuo in R

Finora, utilizzando ggplot2, posso trovare solo metodi come stat_density2d e geom_tile, che funzionano solo per la visualizzazione densità di punti e che rappresentano punti equamente distanziati (per quanto posso dire).

L'ideale sarebbe seguire lo stesso principio come questa immagine: enter image description here

in cui sono stati assegnati i colori in base ai punti dati nelle vicinanze, anche se la densità e il posizionamento dei punti non era uniforme.

Non voglio creare una mappa di calore in forma matriciale come questa immagine: enter image description here

in cui una tabella è color-coded. Invece, desidero creare una mappa di calore continuo utilizzando x distribuite in modo non uniforme e le coordinate y che, in effetti, visualizza il limite in cui i dati vengono suddivisi in infinite rettangoli. Questo potrebbe non essere il metodo effettivo utilizzato dalla funzione, ma fornisce un'idea generale su ciò che sto cercando.

Ecco alcuni dati di esempio:

data=data.frame(x=c(1,1,2,2,3,4,5,6,7,7,8,9), 
    y=c(2,4,5,1,3,8,4,8,1,1,6,9), 
    distance=c(66,84,93,76,104,29,70,19,60,50,46,36)) 

Come posso fare una mappa di calore con la distanza, come la scala cromatica che copre l'intera gamma di numeri, come la trama del primo link fornito?

Qualsiasi aiuto è molto apprezzato!

+0

Dai un'occhiata a questo [collegamento] (http://stackoverflow.com/q/10981324/707145). – MYaseen208

+0

In questo esempio, è necessario ritagliare manualmente i dati in rettangoli discreti. Vorrei che la funzione riducesse i dati secondo necessità e creasse una mappa di calore continua. – user1532996

risposta

3
Ci

è una funzione scritta dall'utente qui che produce mappe di calore utilizzando ggplot2:

http://www.r-bloggers.com/ggheat-a-ggplot2-style-heatmap-function/

e la loro immagine esempio:

example

Se quello che vuoi è una mappa topografica come nel tuo esempio, ci sono un sacco di strumenti per che (appena sotto la ricerca "programma di topo".

E, infine, c'è la mappa isarithmic, che va solo a dimostrare che è necessario rendere chiaro esattamente quello che vuoi fare se si vuole un po 'di smoothing incorporato: http://dsparks.wordpress.com/2011/10/24/isarithmic-maps-of-public-opinion-data/

+1

Aw man. La tua risposta è stata mostrata nella recensione "Messaggi di bassa qualità". Forse potresti aggiungere una breve descrizione di ciò che dice l'articolo? http://meta.stackexchange.com/questions/8231/are-answers-that-just-contain-links-elsewhere-really-good-answers. – GSee

+0

pertinenti, concisi, al punto, e autoesplicativi; imho questa risposta è perfettamente a posto. Tuttavia, la domanda potrebbe utilizzare qualche esempio di auto-limitazione. – baptiste

+0

@baptiste Un breve riassunto di ciò che potrebbe essere trovato al link è tutto ciò che chiediamo, giusto per proteggerci dal link rot. – joran

0
ggplot2::ggfluctuation(data, type="colour") 

non posso dare tutti questi dati ma il head è sotto nella struttura dput.

structure(list(X1 = 236:241, HomeTeam = structure(c(8L, 19L, 
37L, 4L, 6L, 15L), .Label = c("Arizona Cardinals", "Atlanta Falcons", 
"Baltimore Ravens", "Buffalo Bills", "Carolina Panthers", "Chicago Bears", 
"Cincinnati Bengals", "Cleveland Browns", "Dallas Cowboys", "Denver Broncos", 
"Detroit Lions", "Green Bay Packers", "Houston Oilers", "Houston Texans", 
"Indianapolis Colts", "Jacksonville Jaguars", "Kansas City Chiefs", 
"Los Angeles Raiders", "Los Angeles Rams", "Miami Dolphins", 
"Minnesota Vikings", "New England Patriots", "New Orleans Saints", 
"New York Giants", "New York Jets", "Oakland Raiders", "Philadelphia Eagles", 
"Phoenix Cardinals", "Pittsburgh Steelers", "San Diego Chargers", 
"San Francisco 49ers", "Seattle Seahawks", "St. Louis Rams", 
"Tampa Bay Buccaneers", "Tennessee Oilers", "Tennessee Titans", 
"Washington Redskins"), class = "factor"), AwayTeam = structure(c(9L, 
28L, 11L, 20L, 21L, 22L), .Label = c("Arizona Cardinals", "Atlanta Falcons", 
"Baltimore Ravens", "Buffalo Bills", "Carolina Panthers", "Chicago Bears", 
"Cincinnati Bengals", "Cleveland Browns", "Dallas Cowboys", "Denver Broncos", 
"Detroit Lions", "Green Bay Packers", "Houston Oilers", "Houston Texans", 
"Indianapolis Colts", "Jacksonville Jaguars", "Kansas City Chiefs", 
"Los Angeles Raiders", "Los Angeles Rams", "Miami Dolphins", 
"Minnesota Vikings", "New England Patriots", "New Orleans Saints", 
"New York Giants", "New York Jets", "Oakland Raiders", "Philadelphia Eagles", 
"Phoenix Cardinals", "Pittsburgh Steelers", "San Diego Chargers", 
"San Francisco 49ers", "Seattle Seahawks", "St. Louis Rams", 
"Tampa Bay Buccaneers", "Tennessee Oilers", "Tennessee Titans", 
"Washington Redskins"), class = "factor"), Date = structure(c(45L, 
45L, 45L, 45L, 45L, 45L), .Label = c("1990-09-09", "1990-09-10", 
"1990-09-16", "1990-09-17", "1990-09-23", "1990-09-24", "1990-09-30", 
"1990-10-01", "1990-10-07", "1990-10-08", "1990-10-14", "1990-10-15", 
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"1990-11-04", "1990-11-05", "1990-11-11", "1990-11-12", "1990-11-18", 
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"1990-12-31", "1991-01-05", "1991-01-06", "1991-01-12", "1991-01-13", 
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"2008-12-04", "2008-12-07", "2008-12-08", "2008-12-11", "2008-12-14", 
"2008-12-15", "2008-12-18", "2008-12-20", "2008-12-21", "2008-12-22", 
"2008-12-28", "2009-01-03", "2009-01-04", "2009-01-10", "2009-01-11", 
"2009-01-18", "2009-02-01", "2009-09-10", "2009-09-13", "2009-09-14", 
"2009-09-20", "2009-09-21", "2009-09-27", "2009-09-28", "2009-10-04", 
"2009-10-05", "2009-10-11", "2009-10-12", "2009-10-18", "2009-10-19", 
"2009-10-25", "2009-10-26", "2009-11-01", "2009-11-02", "2009-11-08", 
"2009-11-09", "2009-11-12", "2009-11-15", "2009-11-16", "2009-11-19", 
"2009-11-22", "2009-11-23", "2009-11-26", "2009-11-29", "2009-11-30", 
"2009-12-03", "2009-12-06", "2009-12-07", "2009-12-10", "2009-12-13", 
"2009-12-14", "2009-12-17", "2009-12-19", "2009-12-20", "2009-12-21", 
"2009-12-25", "2009-12-27", "2009-12-28", "2010-01-03", "2010-01-09", 
"2010-01-10", "2010-01-16", "2010-01-17", "2010-01-24", "2010-02-07", 
"2010-09-09", "2010-09-12", "2010-09-13", "2010-09-19", "2010-09-20", 
"2010-09-26", "2010-09-27", "2010-10-03", "2010-10-04", "2010-10-10", 
"2010-10-11", "2010-10-17", "2010-10-18", "2010-10-24", "2010-10-25", 
"2010-10-31", "2010-11-01", "2010-11-07", "2010-11-08", "2010-11-11", 
"2010-11-14", "2010-11-15", "2010-11-18", "2010-11-21", "2010-11-22", 
"2010-11-25", "2010-11-28", "2010-11-29", "2010-12-02", "2010-12-05", 
"2010-12-06", "2010-12-09", "2010-12-12", "2010-12-13", "2010-12-16", 
"2010-12-19", "2010-12-20", "2010-12-23", "2010-12-25", "2010-12-26", 
"2010-12-27", "2010-12-28", "2011-01-02", "2011-01-08", "2011-01-09", 
"2011-01-15", "2011-01-16", "2011-01-23", "2011-02-06"), class = "factor"), 
    Season = c(1991, 1991, 1991, 1991, 1991, 1991), HomeRecord = structure(c(1L, 
    1L, 17L, 17L, 17L, 1L), .Label = c("(0-1-0)", "(0-10-0)", 
    "(0-11-0)", "(0-12-0)", "(0-13-0)", "(0-14-0)", "(0-15-0)", 
    "(0-16-0)", "(0-2-0)", "(0-3-0)", "(0-4-0)", "(0-5-0)", "(0-6-0)", 
    "(0-7-0)", "(0-8-0)", "(0-9-0)", "(1-0-0)", "(1-1-0)", "(1-10-0)", 
    "(1-10-1)", "(1-11-0)", "(1-11-1)", "(1-12-0)", "(1-13-0)", 
    "(1-14-0)", "(1-15-0)", "(1-2-0)", "(1-3-0)", "(1-4-0)", 
    "(1-5-0)", "(1-6-0)", "(1-7-0)", "(1-8-0)", "(1-8-1)", "(1-9-0)", 
    "(1-9-1)", "(10-0-0)", "(10-1-0)", "(10-2-0)", "(10-3-0)", 
    "(10-4-0)", "(10-5-0)", "(10-5-1)", "(10-6-0)", "(10-6-1)", 
    "(10-7-0)", "(10-7-1)", "(10-8-0)", "(11-0-0)", "(11-1-0)", 
    "(11-2-0)", "(11-3-0)", "(11-4-0)", "(11-5-0)", "(11-5-1)", 
    "(11-6-0)", "(11-6-1)", "(11-7-0)", "(11-7-1)", "(11-8-0)", 
    "(12-0-0)", "(12-1-0)", "(12-2-0)", "(12-3-0)", "(12-4-0)", 
    "(12-5-0)", "(12-6-0)", "(12-7-0)", "(12-8-0)", "(13-0-0)", 
    "(13-1-0)", "(13-2-0)", "(13-3-0)", "(13-4-0)", "(13-5-0)", 
    "(13-6-0)", "(14-0-0)", "(14-1-0)", "(14-2-0)", "(14-3-0)", 
    "(14-4-0)", "(14-5-0)", "(14-6-0)", "(15-0-0)", "(15-1-0)", 
    "(15-2-0)", "(15-3-0)", "(15-4-0)", "(15-5-0)", "(16-0-0)", 
    "(16-1-0)", "(16-2-0)", "(16-3-0)", "(16-4-0)", "(17-0-0)", 
    "(17-2-0)", "(18-0-0)", "(18-1-0)", "(2-0-0)", "(2-1-0)", 
    "(2-10-0)", "(2-11-0)", "(2-11-1)", "(2-12-0)", "(2-13-0)", 
    "(2-14-0)", "(2-2-0)", "(2-3-0)", "(2-4-0)", "(2-5-0)", "(2-6-0)", 
    "(2-7-0)", "(2-8-0)", "(2-9-0)", "(3-0-0)", "(3-1-0)", "(3-10-0)", 
    "(3-11-0)", "(3-11-1)", "(3-12-0)", "(3-13-0)", "(3-2-0)", 
    "(3-3-0)", "(3-4-0)", "(3-5-0)", "(3-6-0)", "(3-7-0)", "(3-8-0)", 
    "(3-9-0)", "(4-0-0)", "(4-1-0)", "(4-10-0)", "(4-11-0)", 
    "(4-11-1)", "(4-12-0)", "(4-2-0)", "(4-3-0)", "(4-4-0)", 
    "(4-5-0)", "(4-6-0)", "(4-6-1)", "(4-7-0)", "(4-7-1)", "(4-8-0)", 
    "(4-8-1)", "(4-9-0)", "(5-0-0)", "(5-1-0)", "(5-10-0)", "(5-11-0)", 
    "(5-2-0)", "(5-3-0)", "(5-3-1)", "(5-4-0)", "(5-4-1)", "(5-5-0)", 
    "(5-5-1)", "(5-6-0)", "(5-6-1)", "(5-7-0)", "(5-8-0)", "(5-8-1)", 
    "(5-9-0)", "(6-0-0)", "(6-1-0)", "(6-10-0)", "(6-2-0)", "(6-3-0)", 
    "(6-3-1)", "(6-4-0)", "(6-4-1)", "(6-5-0)", "(6-5-1)", "(6-6-0)", 
    "(6-6-1)", "(6-7-0)", "(6-7-1)", "(6-8-0)", "(6-8-1)", "(6-9-0)", 
    "(6-9-1)", "(7-0-0)", "(7-1-0)", "(7-2-0)", "(7-3-0)", "(7-3-1)", 
    "(7-4-0)", "(7-4-1)", "(7-5-0)", "(7-5-1)", "(7-6-0)", "(7-6-1)", 
    "(7-7-0)", "(7-7-1)", "(7-8-0)", "(7-9-0)", "(8-0-0)", "(8-1-0)", 
    "(8-10-0)", "(8-2-0)", "(8-3-0)", "(8-3-1)", "(8-4-0)", "(8-4-1)", 
    "(8-5-0)", "(8-5-1)", "(8-6-0)", "(8-6-1)", "(8-7-0)", "(8-7-1)", 
    "(8-8-0)", "(8-9-0)", "(9-0-0)", "(9-1-0)", "(9-2-0)", "(9-3-0)", 
    "(9-4-0)", "(9-5-0)", "(9-5-1)", "(9-6-0)", "(9-6-1)", "(9-7-0)", 
    "(9-8-0)", "(9-9-0)"), class = "factor"), AwayRecord = structure(c(17L, 
    17L, 1L, 1L, 1L, 17L), .Label = c("(0-1-0)", "(0-10-0)", 
    "(0-11-0)", "(0-12-0)", "(0-13-0)", "(0-14-0)", "(0-15-0)", 
    "(0-16-0)", "(0-2-0)", "(0-3-0)", "(0-4-0)", "(0-5-0)", "(0-6-0)", 
    "(0-7-0)", "(0-8-0)", "(0-9-0)", "(1-0-0)", "(1-1-0)", "(1-10-0)", 
    "(1-10-1)", "(1-11-0)", "(1-11-1)", "(1-12-0)", "(1-13-0)", 
    "(1-14-0)", "(1-15-0)", "(1-2-0)", "(1-3-0)", "(1-4-0)", 
    "(1-5-0)", "(1-6-0)", "(1-7-0)", "(1-8-0)", "(1-8-1)", "(1-9-0)", 
    "(1-9-1)", "(10-0-0)", "(10-1-0)", "(10-2-0)", "(10-3-0)", 
    "(10-4-0)", "(10-5-0)", "(10-5-1)", "(10-6-0)", "(10-6-1)", 
    "(10-7-0)", "(10-7-1)", "(10-8-0)", "(11-0-0)", "(11-1-0)", 
    "(11-2-0)", "(11-3-0)", "(11-4-0)", "(11-5-0)", "(11-5-1)", 
    "(11-6-0)", "(11-6-1)", "(11-7-0)", "(11-7-1)", "(11-8-0)", 
    "(12-0-0)", "(12-1-0)", "(12-2-0)", "(12-3-0)", "(12-4-0)", 
    "(12-5-0)", "(12-6-0)", "(12-7-0)", "(12-8-0)", "(13-0-0)", 
    "(13-1-0)", "(13-2-0)", "(13-3-0)", "(13-4-0)", "(13-5-0)", 
    "(13-6-0)", "(14-0-0)", "(14-1-0)", "(14-2-0)", "(14-3-0)", 
    "(14-4-0)", "(14-5-0)", "(14-6-0)", "(15-0-0)", "(15-1-0)", 
    "(15-2-0)", "(15-3-0)", "(15-4-0)", "(15-5-0)", "(16-0-0)", 
    "(16-1-0)", "(16-2-0)", "(16-3-0)", "(16-4-0)", "(17-0-0)", 
    "(17-2-0)", "(18-0-0)", "(18-1-0)", "(2-0-0)", "(2-1-0)", 
    "(2-10-0)", "(2-11-0)", "(2-11-1)", "(2-12-0)", "(2-13-0)", 
    "(2-14-0)", "(2-2-0)", "(2-3-0)", "(2-4-0)", "(2-5-0)", "(2-6-0)", 
    "(2-7-0)", "(2-8-0)", "(2-9-0)", "(3-0-0)", "(3-1-0)", "(3-10-0)", 
    "(3-11-0)", "(3-11-1)", "(3-12-0)", "(3-13-0)", "(3-2-0)", 
    "(3-3-0)", "(3-4-0)", "(3-5-0)", "(3-6-0)", "(3-7-0)", "(3-8-0)", 
    "(3-9-0)", "(4-0-0)", "(4-1-0)", "(4-10-0)", "(4-11-0)", 
    "(4-11-1)", "(4-12-0)", "(4-2-0)", "(4-3-0)", "(4-4-0)", 
    "(4-5-0)", "(4-6-0)", "(4-6-1)", "(4-7-0)", "(4-7-1)", "(4-8-0)", 
    "(4-8-1)", "(4-9-0)", "(5-0-0)", "(5-1-0)", "(5-10-0)", "(5-11-0)", 
    "(5-2-0)", "(5-3-0)", "(5-3-1)", "(5-4-0)", "(5-4-1)", "(5-5-0)", 
    "(5-5-1)", "(5-6-0)", "(5-6-1)", "(5-7-0)", "(5-8-0)", "(5-8-1)", 
    "(5-9-0)", "(6-0-0)", "(6-1-0)", "(6-10-0)", "(6-2-0)", "(6-3-0)", 
    "(6-3-1)", "(6-4-0)", "(6-4-1)", "(6-5-0)", "(6-5-1)", "(6-6-0)", 
    "(6-6-1)", "(6-7-0)", "(6-7-1)", "(6-8-0)", "(6-8-1)", "(6-9-0)", 
    "(6-9-1)", "(7-0-0)", "(7-1-0)", "(7-2-0)", "(7-3-0)", "(7-3-1)", 
    "(7-4-0)", "(7-4-1)", "(7-5-0)", "(7-5-1)", "(7-6-0)", "(7-6-1)", 
    "(7-7-0)", "(7-7-1)", "(7-8-0)", "(7-9-0)", "(8-0-0)", "(8-1-0)", 
    "(8-10-0)", "(8-2-0)", "(8-3-0)", "(8-3-1)", "(8-4-0)", "(8-4-1)", 
    "(8-5-0)", "(8-5-1)", "(8-6-0)", "(8-6-1)", "(8-7-0)", "(8-7-1)", 
    "(8-8-0)", "(8-9-0)", "(9-0-0)", "(9-1-0)", "(9-2-0)", "(9-3-0)", 
    "(9-4-0)", "(9-5-0)", "(9-5-1)", "(9-6-0)", "(9-6-1)", "(9-7-0)", 
    "(9-8-0)", "(9-9-0)"), class = "factor"), HomeFinal = c(14L, 
    14L, 45L, 35L, 10L, 7L), AwayFinal = c(26L, 24L, 0L, 31L, 
    6L, 16L), HomeLast = c(4, 4, 5, 5, 0, 7), AwayLast = c(6, 
    4, 0, 1, 6, 6), Winner = c("Away", "Away", "Home", "Home", 
    "Home", "Away")), .Names = c("X1", "HomeTeam", "AwayTeam", 
"Date", "Season", "HomeRecord", "AwayRecord", "HomeFinal", "AwayFinal", 
"HomeLast", "AwayLast", "Winner"), row.names = c(NA, 6L), class = "data.frame") 

Poi si dovrebbe fare.

ggfluctuation(table(gamesWide$HomeLast, gamesWide$AwayLast), type="colour") + labs(x="Away", y="Home") + opts(title="Distribution of Last Digit of Score") 

Per ottenere enter image description here

Naturalmente, l'immagine è stata generata utilizzando il dataset completo. Questo dovrebbe essere ulteriormente estensibile ai dati che non sono così simmetrici e rettangolari.

+1

Per inciso, questa risposta è appena stata visualizzata anche nella recensione "Articoli di bassa qualità". Ho eseguito tutti gli esempi in '? Ggfluctuation' e nessuno di loro mi sembra una mappa di calore. Potresti fornire un esempio? – GSee

6

Per generare una mappa continuo con irregolarmente distanziati coordinate è necessario prima intrapolate una griglia regolare (qui utilizzando funzione interp del pacchetto akima):

require(akima) 
data <- data.frame(x=c(1,1,2,2,3,4,5,6,7,7,8,9), 
        y=c(2,4,5,1,3,8,4,8,1,1,6,9), 
        distance=c(66,84,93,76,104,29,70,19,60,50,46,36)) 
resolution <- 0.1 # you can increase the resolution by decreasing this number (warning: the resulting dataframe size increase very quickly) 
a <- interp(x=data$x, y=data$y, z=data$distance, 
      xo=seq(min(data$x),max(data$x),by=resolution), 
      yo=seq(min(data$y),max(data$y),by=resolution), duplicate="mean") 
image(a) #you can of course modify the color palette and the color categories. See ?image for more explanation 

enter image description here

Oppure è possibile utilizzare , per la stessa tracciare, funzionare filled.contour:

filled.contour(a, color.palette=heat.colors) 

enter image description here