# st: Plot residuals against predictors.

 From [email protected] To [email protected] Subject st: Plot residuals against predictors. Date Mon, 29 Nov 2004 23:56:49 -0600

```Greetings List,

I am completing an analysis of GPA against several high school grade
variables. I have regressed the GPA on the three high school grade variables,
and calculated and stored the residuals from this regression.

My output looks like this so far:

regress gpa hsm hss hse

Source |       SS       df       MS              Number of obs =     224
-------------+------------------------------           F(  3,   220) =   18.86
Model |  27.7123302     3  9.23744341           Prob > F      =  0.0000
Residual |  107.750459   220  .489774812           R-squared     =  0.2046
Total |  135.462789   223  .607456452           Root MSE      =  .69984

------------------------------------------------------------------------------
gpa |      Coef.   Std. Err.      t    P>|t|     [95% Conf. Interval]
-------------+----------------------------------------------------------------
hsm |   .1685666   .0354921     4.75   0.000     .0986185    .2385147
hss |   .0343156   .0375589     0.91   0.362    -.0397057    .1083368
hse |   .0451018   .0386959     1.17   0.245    -.0311602    .1213638
_cons |   .5898766   .2942432     2.00   0.046     .0099804    1.169773
------------------------------------------------------------------------------

. predict yhat
(option xb assumed; fitted values)

. predict resid, residuals

Now, I am new to stata, just started learning about it this semester. And I am
trying to plut the residuals versus each of the three high school grade
variables and versus the predicted value of GPA. How do I do this? Also, does
stata have a command to obtain the fitted regression equation>?

-Thomas J. Flanagan

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```