...311.9 KB Preface This grid is the work of thousands of hours of squinting at pixels, hunting memory leaks, adding new features, fixing new bugs and beating the code by force of will into a form that is as feature rich and useable as something of this form can be. Dozens of developers from al...

...311.9 KB Preface This grid is the work of thousands of hours of squinting at pixels, hunting memory leaks, adding new features, fixing new bugs and beating the code by force of will into a form that is as feature rich and useable as something of this form can be. Dozens of developers from al...

... The reason why this won't work is because, ifelse() function converts the values to factors. A nice workaround would be to convert it to characters before evaluating it. dates <- as.Date(c('2011-01-01','2011-01-02','2011-01-03','2011-01-04','2011-01-05')) dates_new <- dates - 1 ...

...311.9 KB Preface This grid is the work of thousands of hours of squinting at pixels, hunting memory leaks, adding new features, fixing new bugs and beating the code by force of will into a form that is as feature rich and useable as something of this form can be. Dozens of developers from al...

...311.9 KB Preface This grid is the work of thousands of hours of squinting at pixels, hunting memory leaks, adding new features, fixing new bugs and beating the code by force of will into a form that is as feature rich and useable as something of this form can be. Dozens of developers from al...

...311.9 KB Preface This grid is the work of thousands of hours of squinting at pixels, hunting memory leaks, adding new features, fixing new bugs and beating the code by force of will into a form that is as feature rich and useable as something of this form can be. Dozens of developers from al...

...311.9 KB Preface This grid is the work of thousands of hours of squinting at pixels, hunting memory leaks, adding new features, fixing new bugs and beating the code by force of will into a form that is as feature rich and useable as something of this form can be. Dozens of developers from al...

...311.9 KB Preface This grid is the work of thousands of hours of squinting at pixels, hunting memory leaks, adding new features, fixing new bugs and beating the code by force of will into a form that is as feature rich and useable as something of this form can be. Dozens of developers from al...

...311.9 KB Preface This grid is the work of thousands of hours of squinting at pixels, hunting memory leaks, adding new features, fixing new bugs and beating the code by force of will into a form that is as feature rich and useable as something of this form can be. Dozens of developers from al...

...311.9 KB Preface This grid is the work of thousands of hours of squinting at pixels, hunting memory leaks, adding new features, fixing new bugs and beating the code by force of will into a form that is as feature rich and useable as something of this form can be. Dozens of developers from al...