Have you try principal component analysis to reduce space variables?

2009/5/19 Nora Pérez <norichuela@hotmail.com>

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> Dear colleagues,
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> I am trying a glm.nb for the distribution of a plant species with 93
> environmental variables. I execute the instruction and I get the following
> message: "Error: C stack usage is too close to the limit".
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> How can I increase the memory of R?
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> Your sincerely,
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> Nora.
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> _________________________________________________________________
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Luis Iván Ortiz Valencia
Estatístico Msc.
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