Call and subtract specific std errors from a regression in one line of code

Asked Nov 07 '17 at 21:08

Active Nov 07 '17 at 21:22

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Given a unique regression object rsystol, how do I subtract the standard errors from, e.g., the first and second coefficients. I am already subtracting the coefficients with the following code:

coefficients(r_systol)[1] - coefficients(r_systol)[3]

Now I need to perform the same operation with the corresponding standard errors.

edited Nov 07 '17 at 21:22

asked Nov 07 '17 at 21:08

Collective Action

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You can get the standard errors from `summary(rsystol)`. – shadowtalker Nov 07 '17 at 21:09
@ssdecontrol thank you; I have read that, but I am looking for a way to call them and subtract them similiar to how I have done the coefficients. – Collective Action Nov 07 '17 at 21:10
`summary` returns a `list` object. You can get the standard errors from there. – shadowtalker Nov 07 '17 at 21:11
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Try `summary(rsystol)$coefficients[1, 2] - summary(rsystol)$coefficients[3, 2]` ? – zx8754 Nov 07 '17 at 21:14
@zx8754 thank you. I have applied this and am getting a result. Can you please explain the significance of the numbers in the bracket, i.e., does 1 (3) represent the coefficient and 2 the indicator for calling the standard error? – Collective Action Nov 07 '17 at 21:18
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`[row, column]`, 2nd column is the Standard Error. See linked post for example. – zx8754 Nov 07 '17 at 21:19

Call and subtract specific std errors from a regression in one line of code

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