Differences

This shows you the differences between two versions of the page.

--- r:dummy_variable [2023/06/07 08:31] – [인터액션에 대한 해석] hkimscil
+++ r:dummy_variable [2025/06/11 08:37] (current) – [mod3 ← lm(api00 ~ yr_rnd + mealcat, data = datavar)] hkimscil
@@ Line 302: / Line 302: @@
 을 바탕으로 각각의 조건을 고려하여 y hat를 계산하면 아래와 같다.
+<wrap #two_dummy_table />
+TABLE. Two dummy variables
 ^                 ^ mealcat0-46  ^ mealcat47-80   ^ mealcat81-100    ^
 | yr_rndbreak     | <wrap> yr_rndbreak = 1
@@ Line 341: / Line 343: @@
 ''**y hat = 808.013 - 42.960 - 281.683 = 483.37**''
 </wrap>  |
 ===== mod4 ← lm(api00 ~ yr_rnd * mealcat, data = datavar) =====
@@ Line 494: / Line 495: @@
 [[: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)
@@ Line 500: / Line 526: @@
 {{: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}}
@@ Line 725: / Line 752: @@
 </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}}