Add annotations of X or Y labels in ggplot barplot

Question

[Ron]

I want to add a scale of values as an annotation in ggplot bar plots.I am pasting my basic code:

p=ggplot(gene_df,aes(x=Sample,y=value))  + geom_bar(stat = "identity") + coord_flip() 
p <- p + xlab('Sample')
p <- p + ylab('Log of Expression Value') 
p <- p + theme_bw() + theme(axis.title.y = element_text(size = rel(1.8), angle = 90))
p <- p + theme(axis.title.x = element_text(size = rel(1.8), angle = 00))

I want to add multiple side bars shown here in the heat map figure :

How Do I Draw A Heatmap In R With Both A Color Key And Multiple Color Side Bars?

The only difference is instead of a heat map,I want to have a barplot since I am focusing on only ONE row instead of multiple rows.

So I would like to add colored yes/no annotations on the side bar as well as a color scale bar as another annotation of the different samples.

Here is my table:

Sample  gene     value
PM154_OM1   AURKA   2.377266429
PM160_Z7    AURKA   2.455818898
PM258_Z2    AURKA   3.138846287
PM315_Z3    AURKA   0.254079187
Sample_LM1  AURKA   2.279417733
Sample_LM2  AURKA   2.327119126
Sample_PM1  AURKA   1.863488775
Sample_PM11_Z8_1_RNA    AURKA   0.880872267
Sample_PM119_X1_1_RNA   AURKA   1.822568341