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      name:  <unnamed>
       log:  d:\Stata\week3.log
  log type:  text
 opened on:  23 Sep 2019, 16:08:36

. sysuse auto,clear
(1978 Automobile Data)

. **************************
. *** One variable graphs
. **************************
. 
. *** Histogram
. // basic command:
. histogram mpg
(bin=8, start=12, width=3.625)

. // defaut is density plots, to plot fraction and frequency:
. histogram mpg, frequency
(bin=8, start=12, width=3.625)

. histogram mpg, fraction
(bin=8, start=12, width=3.625)

. histogram mpg, percent
(bin=8, start=12, width=3.625)

. // add a normal density to the graph
. histogram mpg, normal
(bin=8, start=12, width=3.625)

. // add a kernel density to the graph
. histogram mpg, kdensity
(bin=8, start=12, width=3.625)

. // For discrete variables:
. histogram rep78, percent discrete width(.5)
(start=1, width=.5)

. histogram foreign, percent discrete
(start=0, width=1)

. 
. *** Bar
. // basic command:
. graph bar price

. // to get price by repair records:
. graph bar price,by(rep78)

. // to plot bars by repair records on the same graph
. graph bar price,over(rep78)

. // plot over repair records and foreign
. graph bar price,over(foreign) over(rep78)

. // the variable labels look messy. Want a better version:
. // as a review of the last session:
. label define flb 0 "D" 1 "F"

. label values foreign flb

. graph bar price,over(foreign) over(rep78)

. // Change the look of the bars
. graph bar price, over(foreign) over(rep78) bar(1,color(black))

. **************************
. *** Twoway Graphs
. **************************
. // basic command:
. twoway scatter mpg weight

. // add a fitted line (overlay graphs)
. twoway (scatter mpg weight) (lfit mpg weight)

. // label makers
. twoway (scatter mpg weight,mlabel(make)) (lfit mpg weight)

. // use color to indicate foreign and domestic cars:
. twoway (scatter mpg weight if foreign==0) (scatter mpg weight if foreign==1)

. // edit the legend
. twoway (scatter mpg weight if foreign==0) (scatter mpg weight if foreign==1), legend(label(1 "Domestic") label(2 "Foreign"))

. // use symbols and color
. twoway (scatter mpg weight if foreign==0,msymbol(O) mcolor(black)) (scatter mpg weight if foreign==1,msymbol(X) mcolor(black)), legend(label(1 "Domestic") label(2 "Foreign"))

. // add title to the graphs
. twoway (scatter mpg weight),title("Mileage and Weight")

. 
. **************************
. *** Save and Export
. **************************
. // save graphs in Stata format for future edits
. twoway scatter mpg weight,saving(g1,replace)
(file g1.gph saved)

. twoway scatter price weight,saving(g2,replace)
(file g2.gph saved)

. // combine multiple graphs
. graph combine g1.gph g2.gph

. // export graphs
. graph export graph.png,width(2048) replace
(file graph.png written in PNG format)

. 
. **************************
. *** Before you go
. **************************
. log close
      name:  <unnamed>
       log:  d:\Stata\week3.log
  log type:  text
 closed on:  23 Sep 2019, 16:08:51
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