[R] Marginal Effects of continuous variable in lrm model (Design package)

From: Minyu Chen <minyu.chen_at_ucl.ac.uk>
Date: Tue, 26 Jun 2007 19:03:29 +0100

Dear all:

When I am trying to get the marginal effects:

$adv_inc_ratio),adv_price_ratio=mean(m9201$adv_price_ratio), ...(SOME
MORE CONTINUOUS AND DISCRETE VARIABLES BUT I AM NOT LISTING)... regW=c (0,mean(m9201$regW),1), regWM=c(0,mean(m9201$regWM),1))

It gave out an error message:

Error in summary.Design(result7, adv_inc_ratio = mean(m9201
$adv_inc_ratio), :

        ranges not defined here or with datadist for adv_inc_ratio adv_price_ratio agem1 change2 yr1Libor yr1Libor1mtLag yr1Libor1yrLag change21yrLag change21mtLag fwdReal4yr fwdInfl4yr

But I remember from my previous operation a few months ago (I recorded the commands) that to summary the marginal effect, I don't have to specify the ranges for the discrete variables. However, I use the command again (with slight modification because of the newly added variables) it doesn't work. I don't know what went wrong.

Thank you very much.

Minyu Chen

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