Replacing the existing functionality would be ideal. There is currently one caveat however. I defined the "sbarn" type to be treating as a line graph when drawing the x-axis labels. The bar graph types always draw every label by default. I prefer it this way but some may not. In that case I would suggest treating the new stacked bar graph as a bar graph for drawing labels and updating the area graph in a similar way.
On Wed, Nov 11, 2009 at 3:36 AM, Sherlock, Ric <[email protected]> wrote: > I was thinking along similar lines . The current stacked bar disallows > negative values (gives error). Thomas' version should produce the same > results as the current one for datasets without negatives. So with his > suggested changes to getmin and getmax and replacing the current > makestackbar with makestackbarn we would just have a more functional sbar > type. Any downsides? > > Sent from my Windows® phone. > > -----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 > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
