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Sir, I would like to create a combined line-bar plot, with the line up top and bar plot below, but with the x-axes suppressed on the topmost plot, the line and bar plot areas joined by a common line, and the x-axes (of dates) joined to the bottom part of the bar plot. i have been able to format the area using the layout(matrix( ... commands, but cannot figure out the final step. here's the

Dear R experts, I am learning the very useful XTS package, but cannot figure out the purpose of some commands. in particular, the .indexDate() command does not work as expected. say: x <- timeBasedSeq('2010-01-01/2010-01-02 12:00') x <- xts(1:length(x), x) then i can subset on date as follows: x['2010-01-01'] however the .indexDate() command does not work as expected;

Dear R-help, I have an xts data set that i have subset by date. now it contains a date-time-stamp, and two columns (price and volume traded): my objective is to create tables of volume traded at a price - and i've been successfully using aggregate to do so in interactive use. say the data looks as follows: px_ym1 vol_ym1 2012-06-01 09:37:00 97.91 437 2012-06-01

Sir, I have hit a the limits of my understanding of text / par / opar etc... I have a few related xts data frames which have multiple columns, and have written a for-loop to make a set of charts - however i do not get any margin text when i run the loop. when i test the code outside of the loop the margin text appears - however when i run the loop the margin text does not appear ... what gives?