Hi, I am not quite sure what you meanÎ. I give again reproducible code:
require(ggplot2) require(reshape) DataToPlot<-matrix(data=rnorm(9),nrow=3,dimnames=list(seq(1,3),seq(4,6))) tdm<-melt(DataToPlot) p<- ggplot(tdm, aes(x = X2, y = X1, fill = factor(value))) +                  labs(x = "MHz", y = "Threshold", fill = "Duty Cycle") +                  geom_raster(alpha=1) +                  scale_fill_discrete(h.start=1,breaks=c(0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1),labels=c(0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1)) +                  scale_x_continuous(expand = c(0, 0)) +                  scale_y_continuous(expand = c(0, 0)) DataToPlot in my case contains something like that: DataToPlot           4         5         6 1 -0.4135124 0.4643110 -0.7530622 2 0.8827643 -0.1702428 0.4607671 3 0.7942167 -1.2450487 -0.9380290 what I would like to have is to have one specific color for each of the following cases c(0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1) so for example the -0.4 would be categorized under the 0 category the 0.46 would be categorized under the 0.5 category the -0.75 would be categorized under the 0 category the 0.88 would be categorized under the 0.9 category right now the code I gave prints no color bar. If I change it like that. p<- ggplot(tdm, aes(x = X2, y = X1, fill = factor(value))) +                  labs(x = "MHz", y = "Threshold", fill = "Duty Cycle") +                  geom_raster(alpha=1) +                  scale_fill_discrete(h.start=1) +                  scale_x_continuous(expand = c(0, 0)) +                  scale_y_continuous(expand = c(0, 0)) colorbar comes back but as you will see the defined values is not how I want to categorize my data. Could you please help me find what I do not understand here? I would like to thank you in advance for your reply Regards Alex ________________________________ From: Ista Zahn <istaz...@gmail.com> Cc: R help <R-help@r-project.org> Sent: Monday, February 25, 2013 3:54 PM Subject: Re: [R] ggplot2 Increase font size Hi Alex, See ?theme Best, Ista > > Dear all, > I am using the code as below > tdm <- melt(matrixToPlot) >  p<- ggplot(tdm, aes(x = Var2, y = Var1, fill = factor(value))) + >         labs(x = "Mz", y = "T", fill = "D") + >         geom_raster(alpha=1) + >         scale_fill_discrete(h.start=1) + >         scale_x_continuous(expand = c(0, 0)) + >         scale_y_continuous(expand = c(0, 0)) > > to plot an two dimensional image . > > I would like to ask your help to replace the gray border with white color > and increase the font size of x and y axis as wells as the legend of the > color bar. Could you please give me the function names to use? > > Regards > Alex >    [[alternative HTML version deleted]] > > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > [[alternative HTML version deleted]]
______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
