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<p><font size="-1" face="Courier New, Courier, monospace">olá a
todos</font></p>
<p><font size="-1" face="Courier New, Courier, monospace">Ainda que
a dúvida seja mais conceitual do que do R propriamente.... peço
ajuda aqui</font></p>
<p><font size="-1" face="Courier New, Courier, monospace">Minha
pergunta é:</font></p>
<p><font size="-1" face="Courier New, Courier, monospace">Até que
ponto eu posso usar essa igualdade?? Ou mesmo se posso
considerar isso igual...</font></p>
<p><font size="-1" face="Courier New, Courier, monospace">#############################################<br>
</font></p>
<p><font size="-1" face="Courier New, Courier, monospace">library(
MASS ) # para usar a função ginv</font></p>
<p><font size="-1" face="Courier New, Courier, monospace">x <-
matrix( runif(100*100), 100, 100 )</font></p>
<p><font size="-1" face="Courier New, Courier, monospace">all.equal(
ginv(x), solve( t(x)%*% x ) %*% t(x) ) # TRUE<br>
#############################################<br>
</font></p>
<p><font size="-1" face="Courier New, Courier, monospace">O motivo
de minha dúvida e vontade de usar isso nos modelos lineares com
variáveis linearmente dependentes</font></p>
<p><font size="-1" face="Courier New, Courier, monospace">do tipo de
misturas químicas, onde a soma das proporções logicamente sempre
tem que ser 100%.</font></p>
<p><font size="-1" face="Courier New, Courier, monospace">Por hora,
exponho somente essa dúvida (entre tantas :-) )</font></p>
<p><font size="-1" face="Courier New, Courier, monospace">Agradeço
antecipadamente por qualquer indicação nesse tema de 'ginv'</font></p>
<p><font size="-1" face="Courier New, Courier, monospace">Muito
Obrigado</font></p>
<p><font size="-1" face="Courier New, Courier, monospace">Cleber
Borges<br>
</font></p>
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