[R] How to bind models into a list of models?

[Mark Na]

Hi R-helpers,

I have a character object called dd that has 32 elements each of which
is a model formula contained within quotation marks. Here's what it
looks like:

> dd
 [1] "lm(y ~ 1,data=Cement)"                     "lm(y ~
X,data=Cement)"                     "lm(y ~ X1,data=Cement)"
 [4] "lm(y ~ X2,data=Cement)"                    "lm(y ~
X3,data=Cement)"                    "lm(y ~ X4,data=Cement)"
 [7] "lm(y ~ X + X1,data=Cement)"                "lm(y ~ X +
X2,data=Cement)"                "lm(y ~ X + X3,data=Cement)"
[10] "lm(y ~ X + X4,data=Cement)"                "lm(y ~ X1 +
X2,data=Cement)"               "lm(y ~ X1 + X3,data=Cement)"
[13] "lm(y ~ X1 + X4,data=Cement)"               "lm(y ~ X2 +
X3,data=Cement)"               "lm(y ~ X2 + X4,data=Cement)"
[16] "lm(y ~ X3 + X4,data=Cement)"               "lm(y ~ X + X1 +
X2,data=Cement)"           "lm(y ~ X + X1 + X3,data=Cement)"
[19] "lm(y ~ X + X1 + X4,data=Cement)"           "lm(y ~ X + X2 +
X3,data=Cement)"           "lm(y ~ X + X2 + X4,data=Cement)"
[22] "lm(y ~ X + X3 + X4,data=Cement)"           "lm(y ~ X1 + X2 +
X3,data=Cement)"          "lm(y ~ X1 + X2 + X4,data=Cement)"
[25] "lm(y ~ X1 + X3 + X4,data=Cement)"          "lm(y ~ X2 + X3 +
X4,data=Cement)"          "lm(y ~ X + X1 + X2 + X3,data=Cement)"
[28] "lm(y ~ X + X1 + X2 + X4,data=Cement)"      "lm(y ~ X + X1 + X3 +
X4,data=Cement)"      "lm(y ~ X + X2 + X3 + X4,data=Cement)"
[31] "lm(y ~ X1 + X2 + X3 + X4,data=Cement)"     "lm(y ~ X + X1 + X2 +
X3 + X4,data=Cement)"

I would like to convert this object into a list called Cand.models
with 32 list elements each of which would contain one of the above
model formulae. When I print the list, the models should run, so the
first few elements of the list would look like this (see below output
from a list I created by hand).

Many thanks for any help you can provide!

Mark




>Cand.models

[[1]]

Call:
lm(formula = y ~ 1, data = Cement)

Coefficients:
(Intercept)
      95.42


[[2]]

Call:
lm(formula = y ~ X, data = Cement)

Coefficients:
(Intercept)            X
     82.308        1.874


[[3]]

Call:
lm(formula = y ~ X1, data = Cement)

Coefficients:
(Intercept)           X1
     81.479        1.869