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--- r:dummy_variable [2023/06/07 08:27] – [mod3 ← lm(api00 ~ yr_rnd + mealcat, data = datavar)] hkimscil
+++ r:dummy_variable [2023/06/07 08:49] (current) – [output] hkimscil
@@ Line 493: / Line 493: @@
 마지막 두 케이스를 보면 no_break학교 중에서 밀카테고리 2와 3에서 떨어지는 정도가 어느 정도 완화되는 경향을 보이지만 통계학적으로 significant하지는 않다.
 [[:r:dummy variables with significant interaction|다른 예]]
+<code>
+> summ(mod4)
+MODEL INFO:
+Observations: 400
+Dependent Variable: api00
+Type: OLS linear regression
+MODEL FIT:
+F(5,394) = 261.61, p = 0.00
+R² = 0.77
+Adj. R² = 0.77
+Standard errors: OLS
+--------------------------------------------------------------------
+                                        Est.    S.E.   t val.      p
+---------------------------------- --------- ------- -------- ------
+(Intercept)                           809.69    6.18   130.91   0.00
+yr_rndno_break                        -74.26   26.76    -2.78   0.01
+mealcat47-80                         -164.41    8.88   -18.52   0.00
+mealcat81-100                        -288.19   10.44   -27.60   0.00
+yr_rndno_break:mealcat47-80            22.52   32.75     0.69   0.49
+yr_rndno_break:mealcat81-100           40.76   29.23     1.39   0.16
+--------------------------------------------------------------------
+>
+</code>
+<code>
+cat_plot(mod4, pred=yr_rnd, modx=mealcat)
+cat_plot(mod4, pred=yr_rnd, modx=mealcat, plot.points = TRUE)
+</code>
+{{:r:pasted:20230607-082841.png}}
+{{:r:pasted:20230607-082903.png}}
+<code>
+cat_plot(mod4, pred=yr_rnd, modx=mealcat, geom = line)
+cat_plot(mod4, pred=yr_rnd, modx=mealcat, geom = "line", point.shape = TRUE)
+cat_plot(mod4, pred=yr_rnd, modx=mealcat, geom = "line", point.shape = TRUE, vary.lty = TRUE)
+</code>
+{{:r:pasted:20230607-082945.png}}
+{{:r:pasted:20230607-083044.png}}
+{{:r:pasted:20230607-083128.png}}
 ====== continus + categorical variables ======
 <code>
@@ Line 709: / Line 751: @@
 </code>
 {{:r:pasted:20230531-085237.png}}
+<code>
+> interact_plot(mod6, pred=some_col, modx=yr_rnd, geom = "line", plot.points = TRUE)
+</code>
+{{:r:pasted:20230607-084836.png}}