[R] pls help: lattice graph with both negative and positive value, x and y cross at 0 and negative value bars are plotted just oppositive direction in contrast to positive

[Dennis Murphy]

Hi:

Try this:

barchart(Y ~ factor(X), group = X1, data = dat1,  col = mcol, origin = 0,
          ylab= "y var", xlab = "x var", ylim = c(-3.0, 5.0),
          scales = list(x=list(rot= 90, font = 1, cex = 1) ,
                        y = list(rot= 90, font = 1, cex = 1) ))

The origin = argument comes from panel.barchart(); see its help page
for more details.

HTH,
Dennis

On Sun, May 15, 2011 at 8:17 AM, Ram H. Sharma <sharma.ram.h at gmail.com> wrote:
> Dear R experts:
>
> Here is my problem:
>
>
> #Data 1
>
> Y <- c(0.5, 0.1, 0.5, 1.3, 1.4, 1.6, 1.65, 2.4, 2.6, 3.4, 3.6, 4.3, 4.42,
> 4.8, 4.7, 3.4, 3.3, 2.8, 2.8, 1.2, 1.1, 0.5, 0.2, 0.1, -0.2, -1.5, -2.5,
> -1.3, -0.5, -0.1)
>
> X <- seq(1:30)
>
> X1 <- c(rep("T1", 24), rep("T2", 6))
>
> dat1 <- data.frame(Y, X, X1)
>
>
>
> require(lattice)
>
> mcol <- c("green", "red")
>
> barchart(Y ~ factor (X), group = X1, data = dat1,  col = mcol , ylab= "y
> var", xlab = "x var", ylim = c(-3.0, 5.0), pos = 0,  scales =
> list(x=list(rot= 90, font = 1, cex = 1) , y = list(rot= 90, font = 1, cex =
> 1) ))
>
> The output is not what I want. I want the orientation of graph like the
> following in base R but axis label are in Y axis line and other parameters
> as in lattice:
>
> barplot(Y, names.arg = X)
>
> I know this is simple question, but I could not find a true solution.
>
> --
> Thanks in advance.
>
> Ram H
>
>        [[alternative HTML version deleted]]
>
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