我正在尝试使用ggplot2绘制热力图,并希望调整色条的大小并增加字体大小。
下面是相关代码:
g <- ggplot(data=melt.m)
g2 <- g+geom_rect(aes(xmin=colInd-1, xmax=colInd,
ymin=rowInd-1, ymax=rowInd, fill=value))
g2 <- g2+scale_x_continuous('beta', breaks=c(1, ceiling(cols/2), rows)-0.5,
labels=c(1,ceiling(cols/2), rows))
g2 <- g2+scale_y_continuous('alpha', breaks=c(1, ceiling(rows/2), rows)-0.5,
labels=c(1, ceiling(rows/2), rows))
g2 <- g2+opts(panel.grid.minor=theme_line(colour=NA),
panel.grid.major=theme_line(colour=NA),
panel.background=theme_rect(fill=NA, colour=NA),
axis.text.x=theme_text(size=30),
axis.text.y=theme_text(size=30, angle=90),
axis.title.x=theme_text(size=30),
axis.title.y=theme_text(size=30, angle=90), title = title)
heatscale <- c(low='ghostwhite', high='steelblue')
g2 <- g2+scale_fill_gradient("", heatscale[1], heatscale[2], bias = 10)
它的功能很好,问题在于右侧的颜色图例太小了。有没有办法使颜色图例变大,并增加图例字体大小?
谢谢,
kz