legend_align: Align caption position for legend

In ursa: Non-Interactive Spatial Tools for Raster Processing and Visualization

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 requred 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.

Details

The function is defined as:

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

Value

Character vector.

Author(s)

Nikita Platonov [e-mail]

See Also

legend_colorbar

Examples

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()

ursa documentation built on Feb. 26, 2020, 3:01 p.m.