legend_align: Align caption position for legend

Description

When multiple panels on the same axis, the different order of values or different units of values may provoke different shifting of values and caption from panels. legend_align repairs it by the taking names of classes of the required rasters. The function output is for argument aling of legend_colorbar.

Usage

legend_align(obj)

Arguments

obj

Object of class ursaColorTable, or object of class ursaRaster, or list of ursaColorTable or ursaRaster objects.

Value

Character vector.

Details

The function is defined as:

   c(unlist(sapply(obj,function(x) names(ursa_colortable(x)))))

Examples

Run this code

# NOT RUN {
session_grid(NULL)
a <- ursa_dummy(5,mul=1/4,min=-150,max=200)
a[1] <- a[1]*100
a[2] <- -a[2]*10
a[3] <- a[3]/10
a[4] <- a[4]/1000
b <- lapply(a,colorize)
la.top <- legend_align(b[c(1,2)])
la.left <- legend_align(c(b[[1]],b[[3]]))
la.bottom <- legend_align(b[c(3,4)])
la.right <- legend_align(b[c(2,4)])
leg <- vector("list",12)
leg[[1]] <- list("top",2)
leg[[2]] <- list("top",3)
leg[[3]] <- list("bottom",1)
leg[[4]] <- list("bottom",2)
leg[[5]] <- list(2,"left")
leg[[6]] <- list(1,"right")
leg[[7]] <- list(3,"left")
leg[[8]] <- list(2,"right")
leg[[9]] <- list("top",1)
leg[[10]] <- list("bottom",3)
leg[[11]] <- list(1,"left")
leg[[12]] <- list(3,"right")
cl <- compose_design(layout=c(3,3),legend=leg,byrow=TRUE,skip=5)
print(cl)
compose_open(cl)
ct <- compose_panel(b[c(5,1,2,1,4,3,4,5)],decor=FALSE)
L <- 2
Tr <- 2
legend_colorbar(b[1],trim=Tr,las=L,align=la.top,units="top aligned --->")
legend_colorbar(b[2],trim=Tr,las=L,align=la.top,units="<--- top aligned")
legend_colorbar(b[3],trim=Tr,las=L,align=la.bottom,units="bottom aligned --->")
legend_colorbar(b[4],trim=Tr,las=L,align=la.bottom,units="<--- bottom aligned")
legend_colorbar(b[1],trim=Tr,las=L,align=la.left,units="<--- left aligned")
legend_colorbar(b[2],trim=Tr,las=L,align=la.right,units="<--- right aligned")
legend_colorbar(b[3],trim=Tr,las=L,align=la.left,units="left aligned --->")
legend_colorbar(b[4],trim=Tr,las=L,align=la.right,units="right aligned --->")
legend_colorbar(b[5],trim=Tr,las=L,units=" *** not aligned ***")
legend_colorbar(b[5],trim=Tr,las=L,units=" *** not aligned ***")
legend_colorbar(b[5],trim=Tr,las=L,units=" *** not aligned ***")
legend_colorbar(b[5],trim=Tr,las=L,units=" *** not aligned ***")
compose_close()
# }

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