Syntax error How to remove interaction from regression model in stargazer in R?

How to remove interaction from regression model in stargazer in R?

To remove interaction from regression model in stargazer in R, we can follow the below steps −

  • First of all, create a data frame.
  • Then, create a regression model using stargazer.
  • After that, create the regression model with stargazer without interaction terms.

Create the data frame

Let's create a data frame as shown below −

 Live Demo

x1<-sample(1:50,25)
x2<-sample(1:50,25)
x3<-sample(1:50,25)
x4<-sample(1:50,25)
y<-sample(1:100,25)
df<-data.frame(x1,x2,x3,x4,y)
df

On executing, the above script generates the below output(this output will vary on your system due to randomization) −

    x1 x2  x3  x4  y
1  40  17  49  12  29
2   3   3  31  5   44
3  16  18  34  32  91
4  15  49  30  15  98
5  14  13  50  23  34
6   7  32  16  13  79
7  44  39  26  26  68
8  45  10  19  31  96
9  38  34  45  20  40
10 36  31  2   17  1
11  8  11  20  48  60
12  6  23  4   43  75
13 35  5   15  9   49
14  4  20  35  45  46
15 32  26  18  49  66
16 42  38  25  11  36
17 46  24  14  21  94
18 30  19  29  50  64
19 13  1    5  18  97
20 21  21  17  27  25
21  1  40   41 10  89
22 41  25   8  29 63
23 22  29   38 47  24
24  9  14   13 28  85
25 29  2    37 34  93

Create the regression model using stargazer

Using stargazer to create the regression model in text format −

x1<-sample(1:50,25)
x2<-sample(1:50,25)
x3<-sample(1:50,25)
x4<-sample(1:50,25)
y<-sample(1:100,25)
df<-data.frame(x1,x2,x3,x4,y)
library(stargazer)
Model<-lm(y~x1+x2+x3+x4+x1*x2+x1*x3+x1*x4+x2*x3+x2*x4+x3*x4)
stargazer(Model,type="text")

Output

================================================
      Dependent variable:
   ---------------------------
            y
-----------------------------------------------
x1       -1.177
        (1.440)

x2       0.485
        (1.449)

x3      -1.502
        (1.463)

x4       1.087
        (1.439)

x1:x2   -0.023
        (0.032)

x1:x3    0.012
        (0.031)

x1:x4   0.055*
       (0.030)

x2:x3   0.054
       (0.037)

x2:x4  -0.081*
      (0.044)

x3:x4   -0.016
        (0.037)

Constant 84.551*
        (46.877)

-----------------------------------------------
Observations       25
R2                0.483
Adjusted R2       0.114
Residual Std. Error 26.194 (df = 14)
F Statistic   1.310 (df = 10; 14)
===============================================
Note:       *p<0.1; **p<0.05; ***p<0.01

Create the regression model using stargazer without interaction terms

Using stargazer to create the regression model in text format by ignoring interaction terms with omit function −

 Live Demo

x1<-sample(1:50,25)
x2<-sample(1:50,25)
x3<-sample(1:50,25)
x4<-sample(1:50,25)
y<-sample(1:100,25)
df<-data.frame(x1,x2,x3,x4,y)
library(stargazer)
Model<-lm(y~x1+x2+x3+x4+x1*x2+x1*x3+x1*x4+x2*x3+x2*x4+x3*x4)
stargazer(Model,type="text",omit=":")

Output

===============================================
         Dependent variable:
      ---------------------------
               y
-----------------------------------------------
x1          -1.177
            (1.440)

x2          0.485
           (1.449)

x3         -1.502
           (1.463)

x4         1.087
          (1.439)

Constant  84.551*
         (46.877)

-----------------------------------------------
Observations    25
R2             0.483
Adjusted R2    0.114
Residual Std. Error 26.194 (df = 14)
F Statistic    1.310 (df = 10; 14)
===============================================
Note:       *p<0.1; **p<0.05; ***p<0.01
Updated on: 2021-08-14T08:46:04+05:30

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