diff --git a/class-activity-3.Rmd b/class-activity-3.Rmd
index d8dd1d6..c42ca73 100644
--- a/class-activity-3.Rmd
+++ b/class-activity-3.Rmd
@@ -1,7 +1,7 @@
 ---
 title: "class activity 3"
-author: "Charles Lang"
-date: "10/2/2018"
+author: "Qiyang(Minnie) Lin"
+date: "10/1/2019"
 output: html_document
 ---
 
@@ -11,7 +11,8 @@ install.packages("ggplot2")
 library(ggplot2)
 
 ggplot(diamonds, aes(x = price, y = carat)) +
-  geom_point()
+  geom_point() # + geom_point()meaning that you want to graph this type of graph
+
 ```
 
 #Two layers
@@ -24,6 +25,7 @@ ggplot(mpg, aes(reorder(class, hwy), hwy)) +
 ```{r}
 
 #Plot count
+diamonds
 ggplot(diamonds, aes(depth)) +
   geom_histogram(aes(y = ..count..), binwidth=0.2) +
   facet_wrap(~ cut) + xlim(50, 70)
@@ -43,12 +45,28 @@ ggplot(mpg, aes(displ, hwy, color = class)) +
 Can you create a line graph using the "economics_long" data set that shows change over time in "value01" for different categories of "variable"?
 
 ```{r}
+economics_long
+ggplot(economics_long, aes(date, value01, group = variable, color = variable))+
+ geom_line()
+
+#Plot date
+#ggplot(economics_long, aes(date)) +
+# geom_line(aes(y = value01) )
+# facet_wrap(~ variable)
+
+#plot var
+#ggplot(economics_long, aes(variable)) +
+# geom_line(aes(y = value01) )
+# facet_wrap(~ variable)
 
 ```
 
 If you would like to recreate the Minard graphic of Napoleon's Troops the code is below and the data is in this repo.
 
 ```{r}
+df1<-read.delim("cities.txt")
+df2<-read.delim("troops.txt")
+#cities<- merge.data.frame(df1, df2, by = c('long', 'lat'))
 
 ggplot(cities, aes(long, lat)) +
   geom_path(aes(size = survivors, colour =
@@ -62,6 +80,6 @@ last_plot() +
   scale_x_continuous("", limits = c(24, 39)) +
   scale_y_continuous("") +
   scale_colour_manual(values = c("grey50","red")) +
-  scale_size(to = c(1, 10))
+  scale_size(c(1, 10))
 ```