...
| Excerpt | ||
|---|---|---|
| ||
Each element in the data section of a BUFR can be missing.ecCodes provides a simple way for the user to check if the value of an element is missing by comparing with two constants |
Missing values
Step-by-step guide
Each element in the data section of a BUFR can be missing.
ecCodes provides a simple way for the user to check if the value of an element is missing by comparing with two constants:
| Code Block |
|---|
CODES_MISSING_LONG |
...
CODES_MISSING_DOUBLE |
The constants are available in Python, Fortran 90 and C and the user needs to compare with the appropriate constant depending on the type of the variable used. This is an example of Fortran 90 code:
...
!declare backscatter as double precision
...
| HTML |
|---|
<pre class="hljs" style="display: block; overflow-x: auto; padding: 0.5em; background-color: rgb(240, 240, 240); color: rgb(68, 68, 68);"><span class="hljs-comment" style="color: rgb(136, 136, 136);">! declare backscatter as double precision</span> <span class="hljs-keyword" style="font-weight: 700;">real</span>(<span class="hljs-keyword" style="font-weight: 700;">kind</span>=<span class="hljs-number" style="color: rgb(136, 0, 0);">8</span>), <span class="hljs-keyword" style="font-weight: 700;">dimension</span>(:), <span class="hljs-keyword" style="font-weight: 700;">allocatable</span> :: backscatter <span class="hljs-comment" style="color: rgb(136, 136, 136);">! get the values</span> <span class="hljs-keyword" style="font-weight: 700;">call</span> codes_get(ibufr,<span class="hljs-string" style="color: rgb(136, 0, 0);">'/beamIdentifier=2/backscatter'</span>,backscatter); |
...
<span class="hljs-keyword" style="font-weight: 700;">do</span> i=<span class="hljs-number" style="color: rgb(136, 0, 0);">1</span>,<span class="hljs-built_in" style="color: rgb(57, 115, 0);">size</span>(backscatter) <span class="hljs-comment" style="color: rgb(136, 136, 136);">! compare with double precision |
...
missing</span> |
...
<span class="hljs-keyword" style="font-weight: 700;">if</span> (backscatter(i)/=CODES_MISSING_DOUBLE) |
...
<span class="hljs-keyword" style="font-weight: 700;">then</span> <span class="hljs-comment" style="color: rgb(136, 136, 136);">! process non missing |
...
values</span> |
...
<span class="hljs-keyword" style="font-weight: 700;">else</span> <span class="hljs-comment" style="color: rgb(136, 136, 136);">! process missing |
...
values</span> |
...
<span class="hljs-keyword" style="font-weight: 700;">endif</span>
<span class="hljs-keyword" style="font-weight: 700;">end</span> <span class="hljs-keyword" style="font-weight: 700;">do</span></pre> |
Related articles
| Content by Label | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
...
| hidden | true |
|---|
...