使用P heatmap生成热图流程

    View(a5)
    a4=a5[,c(2,3)]
    View(a4)
    a6=a4
    
    a7=log2(a6+0.0005)
    
    col = colorRampPalette(colors = c("blue","white","red"))(80)
    ##col = colorRampPalette(c("lightblue","lightyellow","orange","#FF6A6A"),bias=1)(300)
    ##300表示色阶，从高到低300个色阶，如果设置5个色阶，即可切成5块
    
    View(a7)
    colnames(a7)=c("KO","NC")
    pheatmap(a7,angle_col = 45,cellheight = 2,cellwidth = 80,color=col, show_rownames = F,fontsize_col=15)