[R] Legend and Main Title positioning

[Antje]

Thank you very much for your help! That code does exactly what I was looking 
for ( I don't have experience with lattice yet )

Ciao,
Antje



Richard.Cotton at hsl.gov.uk schrieb:
>> layout(matrix(c(1,2,3,4), nrow = 2, byrow = TRUE))
>> plot(rnorm(100))
>> plot(rnorm(200))
>> plot(rnorm(300))
>> plot(rnorm(400))
>>
>> Now, I'd like to create a legend below each plot and generate a common 
> title.
>> How can I do that?
> 
> If you are laying plots out in grids like this then lattice graphics are 
> generally the way to go, but here's a solution based upon base graphics. 
> The trick is to include extra potting space in your layout for the 
> legends.  The code is messy, since it requires you to manually specify 
> which cell of the layout to plot into, but I'm sure guven some thought you 
> can automate this.
> 
> #4 space for plots, 4 for legends
> layout(matrix(1:8, nrow = 4, byrow = TRUE), heights=rep(c(3,1),4))
> 
> #Check the layout looks suitable
> layout.show(8)
> 
> #Avoid clipping problems, and create space for your title
> par(xpd=TRUE, oma=c(0,0,2,0))
> 
> #First plot
> plot(rnorm(100))
> 
> #Move down and plot the first legend
> par(mfg=c(2,1))
> legend(0,0, legend="foo", pch=1)
> 
> #Repeat for the other plots and legends
> par(mfg=c(1,2))
> plot(rnorm(200))
> par(mfg=c(2,2))
> legend(0,0, legend="bar", pch=1)
> 
> par(mfg=c(3,1))
> plot(rnorm(300))
> par(mfg=c(4,1))
> legend(0,0, legend="baz", pch=1)
> 
> par(mfg=c(3,2))
> plot(rnorm(400))
> par(mfg=c(4,2))
> legend(0,0, legend="quux", pch=1)
> 
> #Title for all the plots
> title(main="4 plots", outer=TRUE)
> 
> 
> Regards,
> Richie.
> 
> Mathematical Sciences Unit
> HSL
> 
> 
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