R simple if statement returning "condition has length > 1" error

I have a table where I have a numerical column of whole positive and negative values. I am trying to run a simple if statement where if the value of Yds is less than 10, then a brand new numerical column (Ydsle10) gets a 1 else a 0

Here is my code:

Data$Ydslt10 <- if(Data$Yds < 10) {Data$Ydslt10 <- 1} else {Data$Ydslt10<-0}

Here is the error:

 the condition has length > 1 and only the first element will be used

str of my table is:

 $ Name      : Factor w/ 206 levels "A.Abdullah","A.Boldin",..: 68 199 79 120 120 79 68 27 68 150 ...
 $ Team      : Factor w/ 31 levels "ARI","BAL","BUF",..: 9 9 9 4 4 9 9 9 9 4 ...
 $ Position  : Factor w/ 3 levels "RB","TE","WR": 3 2 3 3 3 3 3 1 3 1 ...
 $ Yds       : num  0 10 4 17 14 14 7 2 6 -3 ...
 $ Receptions: num  1 1 1 1 1 1 1 1 1 1 ...
 $ Targets   : num  1 1 1 1 1 1 1 1 1 1 ...
 $ Ydslt10   : num  1 1 1 1 1 1 1 1 1 1 ...
 $ Ydsgt10   : num  0 0 0 0 0 0 0 0 0 0 ...