# Notation Issues

**URL:** <https://forum.dynare.org/t/notation-issues/1867>\
**Category:** Dynare help (legacy posts)\
**Created:** [26 February 2011 21:26 UTC](https://forum.dynare.org/t/notation-issues/1867 "2011-02-26T21:26:21Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![petros\_varth](https://forum.dynare.org/letter_avatar_proxy/v4/letter/p/cc9497/32.png) [@petros\_varth](https://forum.dynare.org/u/petros_varth)\
**Post date:** [26 February 2011 21:26 UTC](https://forum.dynare.org/t/notation-issues/1867/1 "2011-02-26T21:26:21Z")

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Hi All,

I have two questions:

1. I introduce a large equation in the block model;…end;.How can i break the large equation in two or three lines.

Say k=(1-delta)\*k(-1)… ???

2)I want to introduce a model in [exp-logs.So](http://exp-logs.So) i denote the variables

var n;

parameters eta;

and the n^(eta) i introduce it as eta\*exp(n)

Should i repeat n in order to Dynare understand that n is log thus eta\*exp(nn) ???

Thanks in advance,

Petros

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**Author:** ![jpfeifer](https://forum.dynare.org/user_avatar/forum.dynare.org/jpfeifer/32/5044_2.png) [@jpfeifer](https://forum.dynare.org/u/jpfeifer)\
**Post date:** [27 February 2011 08:38 UTC](https://forum.dynare.org/t/notation-issues/1867/2 "2011-02-27T08:38:10Z")

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Hi,

1. Dynare takes everything that is not separated by a semicolon as one line. So you can just wrap around without using the Matlab “…”;. Empty spaces are simply ignored. However, there may be problems if you use tabulators or other special characters to indent the lines. For example:

`k=(1-delta)*k(-1)
      +i; `

1. What you do is perform a variable substitution, i.e. you replace all variables x with exp(x), but you do not log-linearize yourself. Hence, n\_original^(eta) becomes exp(n)^eta, because in this way, n is implicitly defined as log(n\_original) and thus n\_original^(eta)=exp(n)^eta. See other forum posts like e.g. [[Log-linearization](https://forum.dynare.org/t/log-linearization/1856/1)). This also means you do not have to tell Dynare that you performed a substitution.

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**Author:** ![petros\_varth](https://forum.dynare.org/letter_avatar_proxy/v4/letter/p/cc9497/32.png) [@petros\_varth](https://forum.dynare.org/u/petros_varth)\
**Post date:** [27 February 2011 15:25 UTC](https://forum.dynare.org/t/notation-issues/1867/3 "2011-02-27T15:25:32Z")

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[quote=“jpfeifer”]Hi,

1. Dynare takes everything that is not separated by a semicolon as one line. So you can just wrap around without using the Matlab “…”;. Empty spaces are simply ignored. However, there may be problems if you use tabulators or other special characters to indent the lines. For example:

`k=(1-delta)*k(-1)
      +i; `

1. What you do is perform a variable substitution, i.e. you replace all variables x with exp(x), but you do not log-linearize yourself. Hence, n\_original^(eta) becomes exp(n)^eta, because in this way, n is implicitly defined as log(n\_original) and thus n\_original^(eta)=exp(n)^eta. See other forum posts like e.g. [[Log-linearization](https://forum.dynare.org/t/log-linearization/1856/1)). This also means you do not have to tell Dynare that you performed a substitution.[/quote]

Many thanks jpfeifer, this was very useful.

Petros