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-----Original Message----- From: Oleg Kobchenko <[email protected]> Sent: Wednesday, 11 November 2009 21:01 To: Programming forum <[email protected]> Subject: Re: [Jprogramming] Stacked Bar Chart If signed bars is a superset of regular bars, should it an enhancement to existing bar type, rather than a new type? On Nov 10, 2009, at 11:33 AM, Thomas Costigliola <[email protected]> wrote: Thank you for the information. Option 1 led me to great example code so I went ahead and added a new chart type. There had to be some changes to other functions within the jzplot class so I updated the whole class. I attempted to make a subclass but was unsuccessful. All the results can be found here: http://www.jsoftware.com/jwiki/Improved%20Stacked%20Bar%20Graph On Sun, Nov 8, 2009 at 5:08 AM, Sherlock, Ric <[email protected]> wrote: From: Thomas Costigliola I would like to create a chart like the one in the link below. It is a stacked bar chart with no space between the bars. Plot doesn't seem to allow negative values in stacked bar charts. Is there any work around for this? There would also need to be a way to draw the bars next to each other as in a histogram. The given plot was produced with R; it has an incredibly flexible plotting package. http://www.jsoftware.com/jwiki/ThomasCostigliola The gap between bars can be adjusted using the "barwidth" option. "http://www.jsoftware.com/jwiki/Plot/Options"; 'bar;barwidth 1;' plot 3 9 8 _3 9 _7 However I don't think you're going to to get the output you're after using existing plot types and options in J. I see two main avenues of choices: 0. Use the stats/r/rserve addon (interface to R) to create your chart from J data using R. Below is a very basic example of how you could create an R chart as a PDF from J. load 'stats/r/rserve task' Rcmd 'x<- seq(-10,10,length=50)' Rcmd 'y<- x' Rcmd 'foo<- function(x,y){r<-sqrt(x^2+y^2);10*sin(r)/r}' Rcmd 'z<- outer(x , y , foo)' Rcmd 'pdf(file="c:\\users\\rsherloc\\documents\\j602-user\\temp\\RicRplot001.pdf")' Rcmd 'persp(x,y,z,theta=30,phi=30,expand=0.5,xlab="X",ylab="Y",zlab="Z")' Rcmd 'dev.off()' launch jpath '~temp/RicRplot001.pdf' For your purposes you'd want to send the raw data from J to R for plotting rather than create in R as in the above example (otherwise you might as well just do the whole thing in R!?! 1. Create a new custom chart type There was a good thread on modifying and combining existing chart types in the forums about a year ago where Oleg gave an example of how to write a custom plot type. "http://www.jsoftware.com/pipermail/programming/2008-November/013009.html"; I've got a draft of a wiki page summarizing the thread somewhere that I must get around to adding to the wiki. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
