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NCL:<br>
<br>
<font face="monospace"> xsqrt = <strong>where</strong>(arr .gt.
0,<a
href="https://www.ncl.ucar.edu/Document/Functions/Built-in/sqrt.shtml"><strong>
sqrt</strong></a>(arr), arr@_FillValue)</font>
<pre>
Python:
</pre>
<font face="monospace"> xsqrt = np.where(arr > 0,
np.sqrt(arr), np.nan)</font><br>
<br>
<br>
<br>
<div class="moz-cite-prefix">Am 28.02.24 um 16:02 schrieb Karin
Meier-Fleischer via ncl-talk:<br>
</div>
<blockquote type="cite"
cite="mid:b506f4fa-9cf5-4217-bef6-3c027c6249b1@dkrz.de">
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Hi Barry,<br>
<br>
the following two Python examples demonstrate how to set values in
a NumPy and an Xarray array to NaN using a condition.<br>
<br>
<font face="monospace">arr = np.arange(0., 10.)<br>
arr[arr >= 7.] = np.nan<br>
print(arr)</font><br>
<br>
-----> output: [ 0. 1. 2. 3. 4. 5. 6. nan nan nan]<br>
<br>
<font face="monospace">xarr = xr.DataArray(np.arange(10))<br>
xarr = xarr.where(xarr < 7, np.nan)<br>
print(xarr.values)</font><br>
<br>
-----> output: [ 0. 1. 2. 3. 4. 5. 6. nan nan nan]<br>
<br>
Regards,<br>
Karin<br>
<br>
<div class="moz-cite-prefix">Am 28.02.24 um 15:10 schrieb Barry
Lynn via ncl-talk:<br>
</div>
<blockquote type="cite"
cite="mid:CAN7Bv26-RF-DuqjWgRpUFGs=TZmNPLy0MxdM8oHLV9Wp=Y=Y6g@mail.gmail.com">
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<div dir="ltr">
<div>Hi:</div>
<div><br>
</div>
<div>I know how to change an array value to fillvalue in NCL
using a where statement.</div>
<div><br>
</div>
<div>How do I do the same in python, please?</div>
<div><br>
</div>
<div>Barry</div>
<span class="gmail_signature_prefix">-- </span><br>
<div dir="ltr" class="gmail_signature"
data-smartmail="gmail_signature">
<div dir="ltr">
<div>
<div dir="ltr"><br>
</div>
<div dir="ltr">Barry H. Lynn, Ph.D
<div>
<div>Senior <font color="#000000">Scientist,
Lecturer,</font></div>
<div>
<div><font color="#000000">The Institute of Earth
Sciences, <br>
The Hebrew University of Jerusalem, <br>
Givat Ram, Jerusalem 91904, Israel <br>
</font></div>
<font color="#000000">Tel: 972 547 231 170<br>
Fax: (972)-25662581</font></div>
</div>
<div><span style="color:rgb(136,136,136)"><br>
</span></div>
<div>Weather It Is, LTD<br>
Weather and Climate Focus<br>
<a href="http://weather-it-is.com" target="_blank"
moz-do-not-send="true">https://weather-it-is.com</a><br>
Jerusalem, Israel<br>
Local: 02 930 9525<br>
Cell: 054 7 231 170<br>
Int-IS: x972 2 930 9525<br>
<br>
</div>
</div>
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