palette color 色の定義 scale_fill_manual manal scale マニュアルスケール 色見本

1. define gradient private palette and pick up 5 colors. 

my_palette <- colorRampPalette(c("#FF0000","#FFFF00","#00FF00","#00FFFF","#0000FF"))
plot_col <- my_palette(5)[5:1]

2.pick up 5 colors from the standard palette "Spectral".

RColorBrewer::brewer.pal(5,"Spectral")[5:1]

3.display sample

barplot(rep(1,15), col=my_palette(15), axes=FALSE)

barplot(rep(1,11), col=RColorBrewer::brewer.pal(11,"Spectral")[11:1], axes=FALSE)

*note that spectral max color num is 11.

3. define private palette

my_palette <- colorRampPalette(c("#FF0000","#FFFF00","#00FF00","#00FFFF","#0000FF"))

# create 47 colors from my_palette.

g <- g + scale_fill_manual(name='regions',values=my_palette(47),labels=pref_jp)

# can't use scale_fill_hue with 'values=' parameter.