X-axis labels are not displaying properly

X-axis labels are not displaying properly

I have created following dummy rCharts:
My_Data <- data.frame(Names = sapply(1:26, function(x)
return(paste(sample(letters, 26), collapse = ""))), Att1 = LETTERS, Number
= 1:26)
n1 <- nPlot(Number ~ Names, group = "Att1", data = My_Data, type =
"multiBarHorizontalChart")
n1$params$height = 5000
n1$params$width = 1000
n1
However when this plot is displayed in browser, the names in the x-axis
are not visible clearly. Those names are lengthy by how they have been
created in my original requirement. Can someone point me how to display
the full names?
Your help will be highly appreciated.
Thanks and regards,