Created
December 16, 2011 17:12
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Function to make a standard Lexis surface in the graphical device.
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SqLexis <- function(Rates, | |
value = "ASFR", | |
col, | |
breaks, | |
guides = TRUE, | |
guide.int = 5, | |
legend = TRUE, | |
lab.breaks = NULL, | |
legend.args = NULL, | |
axis.args = NULL, | |
...){ | |
# Standard Lexis coordinates: | |
LexTriPeriod <- function(x,brks,cols,value){ | |
col <- cols[(brks-x[value])>=0][1] | |
# lower | |
if (diff(c(x["Age"],x["Year"]))==x["Cohort"]){ | |
xcoord <- c(x["Year"],x["Year"]+1,x["Year"]+1) | |
ycoord <- c(x["Age"],x["Age"],x["Age"]+1) | |
} else { #upper | |
xcoord <- c(x["Year"],x["Year"]+1,x["Year"]) | |
ycoord <- c(x["Age"],x["Age"]+1,x["Age"]+1) | |
} | |
polygon(xcoord,ycoord,col=col,border="transparent") | |
} | |
xlim <- c(min(Rates[,"Year"]), max(Rates[,"Year"]) + 1) | |
ylim <- c(min(Rates[,"Age"]), max(Rates[,"Age"]) + 1) | |
# set plot dimensions: | |
plot(NULL, type = "n", ylim = ylim, xlim = xlim, asp = 1,axes = FALSE, xlab = "",ylab = "", ...) | |
# draw triangles: | |
apply(Rates,1,LexTriPeriod,cols=cols,brks=brks) | |
yrs <- sort(unique(Rates[, "Year"])) | |
yrs <- yrs[yrs %% guide.int == 0] | |
ages <- sort(unique(Rates[, "Age"])) | |
ages <- ages[ages %% guide.int == 0] | |
# period lines, ticks, labels: | |
if (guides){ | |
segments(yrs, min(Rates[, "Age"]) - .5, yrs, max(Rates[, "Age"]) + 1, col = "#00000030") | |
} else { | |
segments(yrs, min(Rates[, "Age"]), yrs, min(Rates[, "Age"]) - .5, col = "black") | |
} | |
text(yrs - .5, ylim[1]-3, yrs, pos = 1, srt = 90, xpd = TRUE) | |
# age lines, ticks, labels | |
if (guides){ | |
segments(xlim[1] - .5, ages, xlim[2], ages, col = "#00000030") | |
} else { | |
segments(xlim[1] - .5, ages, xlim[1], ages, col = "black") | |
} | |
text(xlim[1] - 1, ages, labels = ages, pos = 2, xpd = TRUE) | |
# cohort lines, ticks, labels | |
cohorts <- sort(unique(Rates[, "Cohort"])) | |
cohorts <- cohorts[cohorts %% guide.int == 0] | |
# the x argument is a row of cmat | |
brange <- c(min(Rates[,"Year"]),min(Rates[,"Age"]),max(Rates[,"Year"])+1.5,max(Rates[,"Age"])+1.5) # to add | |
xleft <- pmax(cohorts+brange[2],min(Rates[,"Year"])) | |
ymin <- pmax(brange[2],xleft-cohorts) | |
xright <- pmin(cohorts+brange[4],brange[3]) | |
ymax <- pmin(brange[4],xright-cohorts) | |
if (guides){ | |
segments(xleft,ymin,xright,ymax,col="#00000030") | |
} else { | |
segments(xright,ymax,xright-.5,ymax-.5,col="black") | |
} | |
text(xright-.5,ymax,cohorts,srt=45,xpd=TRUE,pos=4) | |
rect(xlim[1],ylim[1],xlim[2],ylim[2]) | |
if (legend){ | |
fields:::image.plot(z = brks, lab.breaks = lab.breaks, col = cols, legend.only = TRUE, legend.args = legend.args, axis.args = axis.args) | |
} | |
} |
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