[R] Error from lme4: "Error: (p <- ncol(X)) == ncol(Y) is not TRUE"

[Adams, Jean]

Rory,

When I searched online, I found an issue with lme4 on GitHub that suggests
this error is "due to NA values in non-factor variables".
https://github.com/lme4/lme4/issues/246

Hope this helps.

Jean

On Tue, Sep 22, 2015 at 8:18 AM, Rory Wilson <roryrwilson at yahoo.ca> wrote:

> Hello all, I am trying to run a random intercept model using lme4. The
> random effect is a factor of 29 possibilities, making a model with one
> random effect (one level). It is just a linear model. There are 713
> observations. However, when trying to run the model I receive the
> error "Error: (p <- ncol(X)) == ncol(Y) is not TRUE",
> a search for which reveals somewhat surprisingly little. Has anyone seen
> this before? Note that if I simply change the random effect into a fixed
> effect and use lm, the model works perfectly.Thank you!Rory
>
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