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Mehwish,<br>
<br>
I think the problem is your file names contain different decades, so
in your .ctl file where you have:<br>
<br>
DSET cru_ts3.21.%x31.%x30.tmp.dat.nc<br>
<br>
the %x3 will be the same. For example, the first time through the
substitution will be 197, or<br>
<br>
DSET cru_ts3.21.1971.1970.tmp.dat.nc<br>
<br>
One way around this would be to instead use chsub:<br>
<br>
DSET ^cru_ts3.21.%ch.tmp.dat.nc<br>
CHSUB 1 120 1971.1980<br>
CHSUB 121 240 1981.1990<br>
CHSUB 241 360 1991.2000<br>
OPTIONS template<br>
DTYPE netcdf<br>
<br>
More details at <a class="moz-txt-link-freetext" href="http://www.iges.org/grads/gadoc/templates.html">http://www.iges.org/grads/gadoc/templates.html</a><br>
<br>
Jim<br>
<br>
<div class="moz-cite-prefix">On 5/11/14 9:02 PM, Malleswararao
Maguluri wrote:<br>
</div>
<blockquote
cite="mid:CAM+Tnx3i9UMyH2DnNDyW4YBm7PvTQB6bJVYYx1HqZt4gjih_Xg@mail.gmail.com"
type="cite">
<div dir="ltr">
<div>
<div>Hi,<br>
<br>
</div>
Better to use cdo for calculating climatology. otherwise
you can combine your decadal files as a single file using cat
command in cdo and use it as input to grads.<br>
<br>
</div>
Thanks & regards,<br>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Mon, May 12, 2014 at 12:18 PM,
mehwish ramzan <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:mehwish.ramzan@gmail.com" target="_blank">mehwish.ramzan@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div>Dear GrADS community,</div>
<div><br>
</div>
<div>I am trying to merge multiple netcdf files into one
control file so that i can calculate the climatology of
25 years. The data is available in decadal format like
this;</div>
<div><br>
</div>
<div> <font color="#0000ff"><a moz-do-not-send="true"
href="http://cru_ts3.21.1971.1980.tmp.dat.nc"
target="_blank">cru_ts3.21.1971.1980.tmp.dat.nc</a>
</font></div>
<div><font color="#0000ff"> <a moz-do-not-send="true"
href="http://cru_ts3.21.1981.1990.tmp.dat.nc"
target="_blank">cru_ts3.21.1981.1990.tmp.dat.nc</a></font></div>
<div><font color="#0000ff"> <a moz-do-not-send="true"
href="http://cru_ts3.21.1991.2000.tmp.dat.nc"
target="_blank">cru_ts3.21.1991.2000.tmp.dat.nc</a></font></div>
<div><font color="#0000ff"> <a moz-do-not-send="true"
href="http://cru_ts3.21.1991.2000.tmp.dat.nc"
target="_blank">cru_ts3.21.1991.2000.tmp.dat.nc</a></font></div>
<div><br>
</div>
<div>while the information of one .nc file is as;</div>
<div><br>
</div>
<div><font size="3" color="#000000" face="Times New Roman">
</font><font size="3" color="#000000" face="Times New
Roman">
</font>
<p style="margin:0in 0in 10pt"><font size="3"
color="#0000ff" face="Calibri">File 1 : CRU TS3.21
Mean Temperature</font></p>
<font size="3" color="#0000ff" face="Times New Roman">
</font>
<p style="margin:0in 0in 10pt"><font face="Calibri"><font
color="#0000ff"><font size="3"> </font><font
size="3">Descriptor:
<a moz-do-not-send="true"
href="http://cru_ts3.21.1971.1980.tmp.dat.nc"
target="_blank">cru_ts3.21.1971.1980.tmp.dat.nc</a></font></font></font></p>
<font size="3" color="#0000ff" face="Times New Roman">
</font>
<p style="margin:0in 0in 10pt"><font face="Calibri"><font
color="#0000ff"><font size="3"> </font><font
size="3">Binary:
<a moz-do-not-send="true"
href="http://cru_ts3.21.1971.1980.tmp.dat.nc"
target="_blank">cru_ts3.21.1971.1980.tmp.dat.nc</a></font></font></font></p>
<font size="3" color="#0000ff" face="Times New Roman">
</font>
<p style="margin:0in 0in 10pt"><font face="Calibri"><font
color="#0000ff"><font size="3"> </font><font
size="3">Type = Gridded</font></font></font></p>
<font size="3" color="#0000ff" face="Times New Roman">
</font>
<p style="margin:0in 0in 10pt"><font face="Calibri"><font
color="#0000ff"><font size="3"> </font><font
size="3">Xsize = 720</font><font size="3"> </font><font
size="3">Ysize = 360</font><font size="3">
</font><font size="3">Zsize = 1</font><font
size="3"> </font><font size="3">Tsize = 120</font></font></font></p>
<font size="3" color="#0000ff" face="Times New Roman">
</font>
<p style="margin:0in 0in 10pt"><font face="Calibri"><font
color="#0000ff"><font size="3"> </font><font
size="3">Number of Variables
= 1</font></font></font></p>
<font size="3" color="#0000ff" face="Times New Roman">
</font>
<p style="margin:0in 0in 10pt"><font face="Calibri"><font
color="#0000ff"><font size="3"> <font
color="#0000ff"> </font></font><font size="3"
color="#0000ff">tmp 0 -999
near-surface temperature</font></font></font></p>
<font size="3" color="#000000" face="Times New Roman">
</font></div>
<div> </div>
<div>By following some previous posts regarding same
issue, according to my understanding i prepared one ctl
file which can be used as a combination of above four
separate files. The .ctl file is as follows;</div>
<div><br>
<font size="3" color="#000000" face="Times New Roman">
</font></div>
<div>
<p style="margin:0in 0in 10pt"><font face="Calibri"><font
color="#0000ff"><font size="3" color="#000000">DSET</font><font
size="3">
</font><font size="3">cru_ts3.21.%x31.%<a
moz-do-not-send="true"
href="http://x30.tmp.dat.nc" target="_blank">x30.tmp.dat.nc</a></font></font></font></p>
<font size="3" color="#0000ff" face="Times New Roman">
</font>
<p style="margin:0in 0in 10pt"><font size="3"
color="#0000ff" face="Calibri">OPTIONS template</font></p>
<font size="3" color="#0000ff" face="Times New Roman">
</font>
<p style="margin:0in 0in 10pt"><font size="3"
color="#0000ff" face="Calibri">DTYPE netcdf</font></p>
<font size="3" color="#0000ff" face="Times New Roman">
</font>
<p style="margin:0in 0in 10pt"><font size="3"
color="#0000ff" face="Calibri">XDEF 720 linear
-89.75 89.75</font></p>
<font size="3" color="#0000ff" face="Times New Roman">
</font>
<p style="margin:0in 0in 10pt"><font size="3"
color="#0000ff" face="Calibri">YDEF 360 linear 0 360</font></p>
<font size="3" color="#0000ff" face="Times New Roman">
</font>
<p style="margin:0in 0in 10pt"><font face="Calibri"><font
color="#0000ff"><font size="3">ZDEF</font><font
size="3"> </font><font size="3">1 linear 1000</font></font></font></p>
<font size="3" color="#0000ff" face="Times New Roman">
</font>
<p style="margin:0in 0in 10pt"><font size="3"
color="#0000ff" face="Calibri">TDEF 480 linear
jan1971 1mo</font></p>
<font size="3" color="#0000ff" face="Times New Roman">
</font>
<p style="margin:0in 0in 10pt"><font size="3"
color="#0000ff" face="Calibri">vars 1</font></p>
<font size="3" color="#0000ff" face="Times New Roman">
</font>
<p style="margin:0in 0in 10pt"><font face="Calibri"><font
color="#0000ff"><font size="3">tmp 0</font><font
size="3"> </font><font size="3">99
near-surface
temperature</font></font></font></p>
<font size="3" color="#0000ff" face="Times New Roman">
</font>
<p style="margin:0in 0in 10pt"><font size="3"
color="#0000ff" face="Calibri">endvars</font></p>
<p style="margin:0in 0in 10pt"><br>
</p>
<p style="margin:0in 0in 10pt">
<font size="3" color="#000000" face="Calibri">But when
i tried to open this control file. It give error
message;</font></p>
<font size="3" color="#000000" face="Calibri">
<p style="margin:0in 0in 10pt"><font color="#0000ff">Invalid
variable
record</font></p>
<p style="margin:0in 0in 10pt"><font color="#0000ff">
--> The invalid
description file record is:</font></p>
<p style="margin:0in 0in 10pt"><font color="#0000ff">
--> tmp 0 -999
near-surface temperature</font></p>
<p style="margin:0in 0in 10pt"><font color="#0000ff">
The data file was
not opened.</font></p>
<p style="margin:0in 0in 10pt"><font face="Times New
Roman">
I know i am making mistake in preparing ctl file
but i don't know how to put right information ?</font></p>
<p style="margin:0in 0in 10pt"><font face="Times New
Roman">Please help me in solving this issue.</font></p>
<p style="margin:0in 0in 10pt"><br>
</p>
<p style="margin:0in 0in 10pt"><font face="Times New
Roman">Thank You</font></p>
<p style="margin:0in 0in 10pt"><br>
</p>
<p style="margin:0in 0in 10pt"><font face="Times New
Roman">With Best Regards,</font></p>
<p style="margin:0in 0in 10pt"><br>
</p>
<p style="margin:0in 0in 10pt"><font face="Times New
Roman">Mehwish</font></p>
</font>
<p style="margin:0in 0in 10pt"><br>
</p>
<p style="margin:0in 0in 10pt"><br>
</p>
</div>
<div><br>
</div>
<div><br>
</div>
</div>
<br>
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<br>
</blockquote>
</div>
<br>
<br clear="all">
<br>
-- <br>
<div dir="ltr">M. MALLESWARA RAO<br>
M.Tech (Atmospheric Science) & M.Sc (Physics)<br>
<br>
</div>
</div>
<br>
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