diff --git a/Chapter_6.Rmd b/Chapter_6.Rmd
index e66db42..9716609 100644
--- a/Chapter_6.Rmd
+++ b/Chapter_6.Rmd
@@ -114,7 +114,7 @@ text(
 A more common wa to represent tht would be to plot the freuecny through time, using 
 
 ```{r}
-  matplot(cbind(1:nrow(dt) ,1:nrow(dt) ,1:nrow(dt)) ,dt,type="l",lwd=3,col=ship_cols,lty=1,ylab="frequency",xlab="time")
+matplot(cbind(1:nrow(dt) ,1:nrow(dt) ,1:nrow(dt)) ,dt,type="l",lwd=3,col=ship_cols,lty=1,ylab="frequency",xlab="time")
 ```
 
 This should remind you of the plot about changes in allele frequency seen in Chapter 3, we will see later how we can use these description of the data to test hypotheses about the cultural transmission process.