position dodge - side by side bars with geom_bar

[Omar André Gonzáles Díaz]

Hi all,  I need your help.

I need to plot a graphic like the one below.  

I was looking on info for it, and I've found that I needed a long data frame. 

This is my data: 

#####################################################

z <- structure(list(anuncios = structure(c(2L, 1L, 2L, 1L),

                                         .Label = c("PPA1 - Carnes",

                                                    

                                                                       "PPA2 - Pastas"), class = "factor"), acciones = structure(c(1L, 

                                                                                                                                   1L, 2L, 2L), .Label = c("comentarios", "compartidos"), class = "factor"), 

                    cantidad = c(131L, 125L, 120L, 69L)),

               row.names = c(NA, -4L

                    ),

               .Names = c("anuncios", "acciones", "cantidad"),

               class = "data.frame")


########################################################

Code:

I've tried this: 

ggplot(z, aes(x=factor(anuncios), fill=factor(acciones))) +

        geom_bar(position="dodge")

But that didn't work as I expecter, both bars are the same hight:

[Cristel Santos]

Hi Omar, 

Try this:

ggplot(z,aes(x=anuncios,y=cantidad, fill=acciones)) + geom_bar(stat="identity",position="dodge”)

regards

Cristel

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<barras.png>

[Omar André Gonzáles Díaz]

Hi Cristel,

thanks, but I get this error message:

Error in +geom_bar(stat = "identity", position = "dodge") : 

  invalid argument to unary operator

[Cristel Santos]

Hi Omar,

Make sure the code is on the same line or make it so “+” is at the end of the first line like so: 

ggplot(z,aes(x=anuncios,y=cantidad, fill=acciones)) +

geom_bar(stat="identity",position="dodge”)

Let me know if it solves the problem. 

Cristel