analist2

phan tich do thi

du lieu trong dataframe mtcars

#doc du lieu vao
data("mtcars")
h = head(mtcars)
summary(h)

##       mpg             cyl         disp             hp             drat      
##  Min.   :18.10   Min.   :4   Min.   :108.0   Min.   : 93.0   Min.   :2.760  
##  1st Qu.:19.27   1st Qu.:6   1st Qu.:160.0   1st Qu.:106.2   1st Qu.:3.098  
##  Median :21.00   Median :6   Median :192.5   Median :110.0   Median :3.500  
##  Mean   :20.50   Mean   :6   Mean   :211.8   Mean   :117.2   Mean   :3.440  
##  3rd Qu.:21.30   3rd Qu.:6   3rd Qu.:249.8   3rd Qu.:110.0   3rd Qu.:3.888  
##  Max.   :22.80   Max.   :8   Max.   :360.0   Max.   :175.0   Max.   :3.900  
##        wt             qsec             vs            am           gear    
##  Min.   :2.320   Min.   :16.46   Min.   :0.0   Min.   :0.0   Min.   :3.0  
##  1st Qu.:2.684   1st Qu.:17.02   1st Qu.:0.0   1st Qu.:0.0   1st Qu.:3.0  
##  Median :3.045   Median :17.82   Median :0.5   Median :0.5   Median :3.5  
##  Mean   :2.988   Mean   :18.13   Mean   :0.5   Mean   :0.5   Mean   :3.5  
##  3rd Qu.:3.384   3rd Qu.:19.23   3rd Qu.:1.0   3rd Qu.:1.0   3rd Qu.:4.0  
##  Max.   :3.460   Max.   :20.22   Max.   :1.0   Max.   :1.0   Max.   :4.0  
##       carb      
##  Min.   :1.000  
##  1st Qu.:1.000  
##  Median :1.500  
##  Mean   :2.167  
##  3rd Qu.:3.500  
##  Max.   :4.000

# ve histogram cho bien disp

attach(mtcars)
hist(disp,main = 'so dem xe theo disp',col = 'blue',border = 'red')

tom lai

     the mean is:  230.721875

     the median is: 196.3.

hist cho wt

hist(wt,main = 'so dem theo trong luong')

## don gian the thoi ....