I am using layout=NULL to plot multiple charts on the same window, as follows:

>  getSymbols(c('DJIA','NDX','^IXIC'),from='2013-01-01')
> par(mfrow=c(3,1))
> chartSeries(DJIA,type='candlesticks',TA=NULL,theme='white',layout=NULL)
> chartSeries(NDX,type='candlesticks',TA=NULL,theme='white',layout=NULL)
> chartSeries(IXIC,type='candlesticks',TA=NULL,theme='white',layout=NULL)

I'd like to remove the x-labels (they are same for all plots) and stretch the plots vertically to fill up space. With the usual R plot() function, I would adjust 'oma=c()' and 'mar=c()' in 'par()' , but they do not seem to work here. Is there an easy way to do this?

Thanks.
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