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From |
demariaf@unical.it |

To |
statalist@hsphsun2.harvard.edu |

Subject |
st: SET MEMORY PROBLEM |

Date |
Tue, 04 Dec 2007 15:46:59 +0100 |

Hi everyone,

I have a big database in which the number of rows is equal to 6519324 and the number of column is approximate to 170 (including fixed effects), and I have 5 years.

My model is the following:

I estimate:

lnX_ij=á+â_1 lnY_i+ â_2 lnY_j +â_3 lnPOP_I+â_4 lnPOP_J+â_5lnD_ij+åij

to estimate this model I have to use a poisson.

when I use all years I get following message:

no room to add more variables due to width

An attempt was made to add a variable that would have increased the memory required to store an observation beyond what is currently possible. You have the following alternatives:

1. Store existing variables more efficiently; see help compress.

2. Drop some variables or observations; see help drop. (Think of Stata's data area as the area of a rectangle; Stata can trade off width and length.)

3. Increase the amount of memory allocated to the data area using the set memory command; see help memory.

Instead when I use just one year I get next message:

matsize too small

You have attempted to create a matrix with more than 300 rows or columns or to fit a model with more than 300 variables plus ancillary parameters. You need to increase matsize using the set matsize command; see help matsize.

I have tried to set Stata memory in different ways, instance:

set matsize 500

set maxvar 2048

set memory 1350m

but stata doesn't work yet. My laptop has the following characteristics:

RAM 2047 MB

SYSTEM 32 BIT AND PROCESSOR CPU INTEL CORE 2 T7400@2.16 GHz

what can I do?

Thanks

federica

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**Follow-Ups**:**st: Re: SET MEMORY PROBLEM***From:*"Steven Proud" <steven_proud@hotmail.com>

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