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Align the assignment operators (either<- or=) within a highlightedarea.

Before:

a<-1:5bbb<-6:10c<-letters

After:

a<-1:5bbb<-6:10c<-letters

For alignment of any text, you can align multiple cursors with theAlign Cursors addin. Add multiple cursors to your document byholdingCtrl/Cmd +Alt and clicking inthe RStudio editor, or by holdingAlt and clicking anddragging the mouse.

AlignAssign contains three addins. Two addins align all of either the<- (Align Assign) or= (Align Assign 2) assignment operatorswithin a highlighted region and the third aligns multiple cursors acrosslines to the same column.

None of the addins “reflow” your code if the alignment breaks the pagewidth. They also does not treat commented lines differently touncommented lines.If there is either one of the assignment operatorswithin a highlighted comment line, then it will either align thatoperator or align other operators to it.

devtools::install_github("seasmith/AlignAssign")`

You can assign each alignment addin action to a specific keyboardshortcut in RStudio in theModify keyboard shortcuts… menu optionunder theTools menu.

When you highlight the following chunk of code (region) - whether youhighlight the entirity or just a portion of the first and last lines -and then run theAlign Assign addin…

# This is a commented line# So is thisa<-1:5b<-6:10copy_a<-a# More comments

…the result will look like this.

# This is a commented line# So is thisa<-1:5b<-6:10copy_a<-a# More comments

The above example also works for the= operator when using the otheraddin,Align Assign 2. Before…

# Perosnal informationlist(surname="Crichton",firstName="John",address=NA,occupation="fugitive")

…after.

# Perosnal informationlist(surname="Crichton",firstName="John",address=NA,occupation="fugitive")

Be mindful that highling a chunk of code which has assignment operatorswithin commented lines, like the following, and running theAlign Assign 2 addin…

# This is a commented line with an assignment operator <-a<-1:5b<-6:10c<-11:15# There is an assignment operator <- here, too

…will result in something like this.

# This is a commented line with an assignment operator <-a<-1:5b<-6:10c<-11:15# There is an assignment operator                      <- here, too

There is also no special handling of assignment operators within afunction. So, if you highlighted the entire chunk below and then ran theAlign Assign addin…

var1<-lettersvar2<- as.list(sample(1:26,26))names(var2)<-var1[unlist(var2)]list.pos<-function(name,lst){matches<- sapply(name,function(x){matched<- which(names(lst)%in%x)if(length(matched)==0)matched<-NAmatched    })return(matches)}positions<- list.pos(c("a","bbb","c"),var2)

…the result will look like this.

var1<-lettersvar2<- as.list(sample(1:26,26))names(var2)<-var1[unlist(var2)]list.pos<-function(name,lst){matches<- sapply(name,function(x){matched<- which(names(lst)%in%x)if(length(matched)==0)matched<-NAmatched    })return(matches)}positions<- list.pos(c("a","bbb","c"),var2)