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<p>Hi Mary,</p>
<p>Thanks for your reply.</p>
BRG,<br>
<br>
Kritanai<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 25-Apr-16 10:49 PM, Mary Haley
wrote:<br>
</div>
<blockquote
cite="mid:CACNN_CLwHD4AAsOjYSO4-RERWprdA-+Ho5kPgTXAh91YnHVxWQ@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_default" style="font-size:small">Kritanai,</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small">Yes, by
default, this function will calculate the SPI by applying a
2-parameter gamma distribution fit, regardless of whether you
have NCL Version 6.2.1 or 6.3.0.</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small">To get the
Pearson type III distribution, you need to have NCL V6.3.0 or
later, and you need to set:</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small"> opt = True</div>
<div class="gmail_default" style="font-size:small">
opt@spi_type = 3</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style="font-size:small">You can see
full information on the dim_spi_n page:</div>
<div class="gmail_default" style="font-size:small"><br>
</div>
<div class="gmail_default" style=""><a moz-do-not-send="true"
href="http://www.ncl.ucar.edu/Document/Functions/Built-in/dim_spi_n.shtml">http://www.ncl.ucar.edu/Document/Functions/Built-in/dim_spi_n.shtml</a><br>
</div>
<div class="gmail_default" style=""><br>
</div>
<div class="gmail_default" style="">--Mary</div>
<div class="gmail_default" style=""><br>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Sun, Apr 24, 2016 at 4:44 AM,
Kritanai Torsri <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:kritanai@haii.or.th" target="_blank">kritanai@haii.or.th</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Dear All,<br>
<br>
I used the "dim_spi_n" function with the Pearson type III to
compute SPI.<br>
<br>
Am I correct that, by default, the NCL function still used
the Maximum<br>
likelihood to estimate<br>
<br>
the location, scale, and shape of the gamma distribution as
in<br>
two-parameter gamma distribution or it uses another method?<br>
<br>
If any one know, please give me suggestion and thanks in
advance.<br>
<br>
BRGs,<br>
<br>
Kritanai Torsri<br>
<br>
Assistant Researcher<br>
<br>
Hydro and Agro Infomatics Institute, Bangkok, Thailand.<br>
<br>
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<br>
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</blockquote>
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