search for: symbology

...scanned elsewhere), so even though I''m referring to PS above it''s not a necessary component. Any solution that takes a numeric code and generates a barcode as GIF/JPG is suitable. I know there is a barcode gem (which uses RMagick directly) but it only works for the code-39 symbology. I''ll be happy to add to it if it makes sense (and if the author is so inclined). I have also seen various Perl/Python etc. tools out there. I can port it and gemmify if that''s the best solution, but my hunch is PS -> RMagick -> GIF/JPG will be the most straightforwar...

Dear r-help users, I am using Sweave and Latex to create tables with output from several statistical test. As an example: I have a grouping variable "group" with two levels ("x" and "y") which I compare on variables ("a" and "b"). I have created a table in which means, standard deviations, and the statistic and p.value resulting from a t.test is

Hi, I am quite new to R (but like it very much!), so please apologize if this is a too simple question. I have a large data frame consisting of data from a survey. There is, for example, information about age and education (a numeric value from 1-9). Now I would like to extract the total amount of each type of education within different age groups (e.g. from 18 to 25, from 25 to 35 etc.).