Re: [netcdfgroup] Handling netcdf data

  • To: netcdfgroup@xxxxxxxxxxxxxxxx
  • Subject: Re: [netcdfgroup] Handling netcdf data
  • From: Sourish Basu <Sourish.Basu@xxxxxxxxxxxx>
  • Date: Thu, 28 Jan 2021 10:04:33 -0500
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    <p>Indri,</p>
    <p>What you want to do can be easily done in python once you've
      installed the python-netcdf module
      (<a class="moz-txt-link-freetext" 
href="https://pypi.org/project/netCDF4/";>https://pypi.org/project/netCDF4/</a>),
 as follows:</p>
    <p><tt>with Dataset('file_name.nc', 'a') as fid:<br>
            fid.START_DATE = '2000-01-01_00:10:00' # or whatever date
        you want<br>
            fid.SIMULATION_START_DATE = </tt><tt>'2000-01-01_00:10:00'</tt><tt>
        # or whatever date you want</tt></p>
    <p>-Sourish<br>
    </p>
    <div class="moz-cite-prefix">On 1/27/21 9:05 PM, Dave Allured - NOAA
      Affiliate via netcdfgroup wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CALqwTFPOdS14WxeiXEqsfd1eeMa=aJgXM3-wSRHmKObr0LrqtA@xxxxxxxxxxxxxx">
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                <div dir="ltr">
                  <div>Indri,</div>
                  <div><br>
                  </div>
                  <div>Please keep the conversation on the mailing list
                    by using CC or Reply All.</div>
                  <br>
                  The attributes that you highlighted are simple text
                  strings, which are easy to change.  This can be done
                  on the unix command line with no programming, with
                  freeware packages such as <b>NCO</b> (NetCDF
                  Operators).  There are several examples in the
                  description of the <b>ncatted</b> utility (attribute
                  editor) in the <b>NCO</b> documentation:</div>
                <div dir="ltr"><br>
                </div>
                <div dir="ltr"><a
href="http://nco.sourceforge.net/nco.html#ncatted-netCDF-Attribute-Editor";
                    
moz-do-not-send="true">http://nco.sourceforge.net/nco.html#ncatted-netCDF-Attribute-Editor</a><br>
                </div>
                <div dir="ltr"><br>
                </div>
                <div>Here is an example that might work on your actual
                  data file:</div>
                <div><br>
                </div>
                <div>ncatted -h -a
                  START_DATE,global,o,c,'2099-01-01_18:00:00' \<br>
                      -a
                  SIMULATION_START_DATE,global,o,c,'2099-01-01_18:00:00'
                  <a
href="http://secure-web.cisco.com/15UpK_qXQipNPj29wABooUgAEweu6vWVt23pl4rdU3XLc-tWRmzn_f7YrJO7TW4INsk75toW3B11QxMe9xcUrWunadF6w57hf1yMhhCk6NKAXd0PMOOBqsK6oZAx1i3NXtn7FvyD2m8yUd63WDl6Npg4KXfsNweTXoMMk_BZFj_uyrTzGsXsptDyNihwEO2cuppCU2vBakF8cosSQn-9vTwQmtljhatnIzA6JqRZKzVioLm33qk0uu3eLmM-nFES5deEBHANFR2NEc72o1GqOh9mdvP15BmXfWuLbIuBaGifydggMlje3KzLpBGxsm1LYyu_PfMkTuherydunJgxwK8PIkdSen5DwsSX_jp4BVxWB5krdwiv5CNb86SHHV2lRYi0sUqJlVM6wi-nKoVFknD8rgRNaLTVxUcD878WcYGVPLEY1WhlrVTaPLiU29TdK/http%3A%2F%2Ffilename.nc";
                    moz-do-not-send="true">filename.nc</a><br>
                  <br>
                </div>
                <div>I am sure there is also an easy way to do this in
                  python.  Perhaps one of the python programmers here
                  can give an example.</div>
                <div dir="ltr">
                  <div dir="ltr"><br>
                  </div>
                  <br>
                  <div class="gmail_quote">
                    <div dir="ltr" class="gmail_attr">On Wed, Jan 27,
                      2021 at 5:36 PM Miranti Indri Hastuti &lt;<a
                        href="mailto:mirantihastuti@xxxxxxxxx";
                        moz-do-not-send="true">mirantihastuti@xxxxxxxxx</a>&gt;
                      wrote:<br>
                    </div>
                    <blockquote class="gmail_quote" style="margin:0px
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                      <div dir="ltr">
                        <div dir="ltr">
                          <div style="font-family:&quot;comic sans
                            ms&quot;,sans-serif">Hi Dave,</div>
                          <div style="font-family:&quot;comic sans
                            ms&quot;,sans-serif"><br>
                          </div>
                          <div style="font-family:&quot;comic sans
                            ms&quot;,sans-serif">Thank you for answering
                            my question,</div>
                          <div style="font-family:&quot;comic sans
                            ms&quot;,sans-serif">what I'm going to edit
                            is to change the attributes of ncfile, for
                            example :</div>
                          <div style="font-family:&quot;comic sans
                            ms&quot;,sans-serif"><img
                              src="cid:part4.E6B839BE.0557EB42@colorado.edu"
                              alt="image.png" class="" width="546"
                              height="331"><br>
                          </div>
                          <div style="font-family:&quot;comic sans
                            ms&quot;,sans-serif">In this ncdef file, I
                            want to change start date and simulation
                            start date. Is that possible?</div>
                          <div style="font-family:&quot;comic sans
                            ms&quot;,sans-serif">And my
                            language programming is python.</div>
                          <div style="font-family:&quot;comic sans
                            ms&quot;,sans-serif"><br>
                          </div>
                          <div style="font-family:&quot;comic sans
                            ms&quot;,sans-serif">I am really grateful
                            for your help for answering my questions
                            associated on my research.<br>
                          </div>
                          <div style="font-family:&quot;comic sans
                            ms&quot;,sans-serif">Thank you in advance.</div>
                          <div style="font-family:&quot;comic sans
                            ms&quot;,sans-serif"><br>
                          </div>
                          <div style="font-family:&quot;comic sans
                            ms&quot;,sans-serif">sincerely </div>
                          <div style="font-family:&quot;comic sans
                            ms&quot;,sans-serif"><br>
                          </div>
                          <div style="font-family:&quot;comic sans
                            ms&quot;,sans-serif">Indri</div>
                          <div style="font-family:&quot;comic sans
                            ms&quot;,sans-serif"><br>
                          </div>
                        </div>
                      </div>
                      <br>
                      <div class="gmail_quote">
                        <div dir="ltr" class="gmail_attr">On Thu, Jan
                          28, 2021 at 7:34 AM Dave Allured - NOAA
                          Affiliate &lt;<a
                            href="mailto:dave.allured@xxxxxxxx";
                            target="_blank" 
moz-do-not-send="true">dave.allured@xxxxxxxx</a>&gt;
                          wrote:<br>
                        </div>
                        <blockquote class="gmail_quote"
                          style="margin:0px 0px 0px
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                          <div dir="ltr">
                            <div>Indri, there is more than one way to
                              store date and time in a netcdf file. 
                              Please show an actual short example, and
                              describe the general nature of how you
                              want to change it.  Also, what programming
                              languages do you like to use for data
                              work?</div>
                            <div dir="ltr"><br>
                            </div>
                            <br>
                            <div class="gmail_quote">
                              <div dir="ltr" class="gmail_attr">On Sat,
                                Jan 23, 2021 at 8:50 AM Miranti Indri
                                Hastuti &lt;<a
                                  href="mailto:mirantihastuti@xxxxxxxxx";
                                  target="_blank" 
moz-do-not-send="true">mirantihastuti@xxxxxxxxx</a>&gt;
                                wrote:<br>
                              </div>
                              <blockquote class="gmail_quote"
                                style="margin:0px 0px 0px
0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex">
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                                  <div dir="ltr">
                                    <div style="font-family:&quot;comic
                                      sans ms&quot;,sans-serif">
                                      <div
                                        
style="font-family:Arial,Helvetica,sans-serif"><font
                                          style="font-family:&quot;comic
                                          sans ms&quot;,sans-serif"
                                          color="#24292e">Hi my name is
                                          Indri. I want to change the
                                          date and time on my netcdf
                                          data. So, i</font><span
                                          style="font-family:&quot;comic
                                          sans ms&quot;,sans-serif">s
                                          there a way to edit date and
                                          time on the netcdf data?</span></div>
                                      <div
                                        
style="font-family:Arial,Helvetica,sans-serif"><font
                                          face="comic sans ms,
                                          sans-serif"><br>
                                        </font></div>
                                      <div
                                        
style="font-family:Arial,Helvetica,sans-serif"><font
                                          face="comic sans ms,
                                          sans-serif">I am really
                                          grateful for your help for
                                          answering my questions
                                          associated on my 
research.</font></div>
                                      <div
                                        
style="font-family:Arial,Helvetica,sans-serif"><font
                                          face="comic sans ms,
                                          sans-serif">Thank you very
                                          much.</font></div>
                                      <div
                                        
style="font-family:Arial,Helvetica,sans-serif"><font
                                          face="comic sans ms,
                                          sans-serif"><br>
                                        </font></div>
                                      <div
                                        
style="font-family:Arial,Helvetica,sans-serif"><font
                                          face="comic sans ms,
                                          sans-serif">Best Regards</font></div>
                                      <font
                                        
style="font-family:Arial,Helvetica,sans-serif"
                                        color="#888888">
                                        <div><font face="comic sans ms,
                                            sans-serif">Miranti 
Indri,</font></div>
                                      </font></div>
                                  </div>
                                </div>
                              </blockquote>
                            </div>
                          </div>
                        </blockquote>
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                  </div>
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      <br>
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