请查看下面的数据示例和代码。我正在尝试使用geom_tile将此scaled矩阵绘制为热图。显然，情节似乎没有显示正确的内容和内容。你们有些人想检查一下吗？
miRNA Group 0h_rep1 1h_rep1 4h_rep1 9h_rep1 15h_rep1 18h_rep1 21h_rep1 0h_rep2 1h_rep2 4h_rep2 9h_rep2 15h_rep2 18h_rep2 21h_rep2
hsa-miR-7705 G1 -0.5791601303 -0.2799399884 -0.1896145785 0.2137443595 0.5462122103 0.0546742825 0.0357391566 -0.8364257583 -0.0359128249 0.0357391566 0.3926289049 0.511077882 0.2026552482 -0.0714179196
hsa-miR-7-1-3p G1 -0.2365412352 -0.276712928 0.050566601 0.0367194013 0.3796356901 0.1196670385 0.2062513311 -0.2935208321 -0.3420719883 -0.3243606254 0.050566601 0.3782237567 0.1771089921 0.0744681968
hsa-miR-381-3p G2 -0.4223373638 -0.2716594911 0.2548068809 0.9238278212 0.4612359248 -0.1146808224 -0.3882829088 -0.242293132 -0.6773726941 0.1155544155 0.5506500983 0.2419740966 -0.1146808224 -0.3167420029
hsa-miR-411-5p G2 -0.3406583024 -0.2678739252 0.4530401188 0.7580901648 0.0559456228 -0.1831301191 -0.4373072487 -0.336123987 -0.2159876198 0.3049452746 0.7131799981 0.0402389375 -0.1831301191 -0.3612287948
data.m <- melt(data, id.vars=c("Group","miRNA"))
head(data.m)
p <- ggplot(data.m, aes(variable, miRNA))
p + geom_tile(aes(fill = value)) + facet_wrap(~Group,ncol=4) +
scale_fill_gradient2(low=muted("blue"), high=muted("red")) +
scale_x_discrete(labels=c("0h_rep2", "0h_rep1", "1h_rep2","1h_rep1","4h_rep2","4h_rep1","9h_rep2","9h_rep1", "15h_rep2", "15h_rep1","18h_rep2","18h_rep1","21h_rep2","21h_rep1")) +
theme_bw(base_size=20) +
theme(axis.text.x=element_text(angle=0, vjust=0.5, hjust=0, size=12), axis.text.y=element_text(size=12), strip.text.y=element_text(angle=0, vjust=0.5, hjust=0.5, size=12),
strip.text.x=element_text(size=12)) +
labs(y="Genes", x="Time (h)", fill="")