I think the reason this fails is that the condition should result in a boolean scalar, whereas here it is a series of booleans.

In this case you can use the ternary operator to set up a conditional assignment (see User Guide p. 140):

<hansl>

open australia.gdt

series E_hp = E - hpfilt(E, 1600)

series E_reg1= (E > E_hp) ? E : NA

series PAUreg1 = (E > E_hp) ? PAU : NA

series PUSreg1 = (E > E_hp) ? PUS : NA

<hansl>

HTH,

Jan Annaert

UNIVERSITEITANTWERPEN | Faculty of Applied Economics (TEW) | Dept. Accounting & Finance
Room  S.B.335 | Prinsstraat 13 | B-2000 Antwerp  | Belgium
Phone +32 32654163 |Fax +32 32654064

https://www.uantwerp.be/en/staff/jan-annaert/
http://ssrn.com/author=143473

From: Henrique Andrade <henrique.coelho@gmail.com>
Reply-To: "gretl-users@lists.wfu.edu" <gretl-users@lists.wfu.edu>
Date: woensdag 25 maart 2015 17:15
To: "gretl-users@lists.wfu.edu" <gretl-users@lists.wfu.edu>
Subject: [Gretl-users] "If-Else" syntax help

Dear Gretl community,

I'm not a good "if-else" user so I need a little help. What's wrong with the following code?

<hansl>

open australia.gdt

series E_hp = E - hpfilt(E, 1600)

if E > E_hp

    series E_reg1 = E

    series PAUreg1 = PAU

    series PUSreg1 = PUS

else

    series E_reg1 = NA

    series PAUreg1 = NA

    series PUSreg1 = NA

endif

<hansl>

When I execute it I get the messages: "error evaluating 'if'" "Error executing script: halting".

Best regards,

Henrique Andrade

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