[gradsusr] Size of x&y axis values, ENSO Index maskout neutral conditions, HADISST (GNUZip)/ERSST (1600 .nc files)
jma at cola.iges.org
Fri Apr 18 13:59:23 EDT 2014
Looks like Davide and Andrew covered Questions 1 and 3.
Here is my suggestion for Question 2: 'd maskout(var,abs(var)-0.5);const(var,0)'
On Apr 17, 2014, at 11:38 AM, Corey Gabriel wrote:
> Dear Grads Community:
> I would greatly appreciate your assistance with the following three questions.
> ***Controlling size of values displayed on x and y axis
> ***Maskout (hiding linefill for ENSO neutral values, -0.5<x<0.5)
> ***Working with HADISST/ERRST (compressed files, fast download/combine or ASCII to netcdf)
> Question 1: All refer to attributes in the figure. Attached is a time series of SST anomaly for the Nino3.4 region from 1966-2005 (3 panel, one from each model).
> Unfortunately after putting three images on one figure, the x-axis labels (2,1.5,1 etc.) and y-axis label (1970, 1975...etc) are too small to read. I have tried set digsiz (but as expected that was not applicable) and set strsiz (which also doesn't work since the axis value labels are not strings).
> Is there are way to make my x and y axis values bigger?
> Question 2: Please see time series plot. As you can see I have filled values greater than 0 red, and below 0 blue. I would like to only fill values above 0.5 in red and values below -0.5 in blue (corresponding to the phase of the oscillation). I have tried working with the maskout command, but I have been unable to make the entire thing work.
> Here's a snippet of the code
> (plotting the colorfill)
> set gxout linefill
> Here's a snippet of the code
> define nino var1= ...
> define var2=...
> set t 1274 1751
> set lfcols 2 4
> d (var1-var2);(var2-var2)
> set gxout line
> (Now I plot the line portion)
> How can I use the maskout command (or another command) to not fill values between -0.5 and 0.5?
> Question 3: I am attempting to plot observation data as well. I am trying to use HADISST or ERSST.v3b. Unfortunately, with the HADISST data, the ncfile s are compressed using GNU zip. I cannot figure out how to move forward and work with this file (it will not allow me to use ncdump until I manipulate the files). Is there a way to handle this type of file?
> Alternatively, I am looking at the ERSST files. (See ftp://ftp.ncdc.noaa.gov/pub/data/cmb/ersst/v3b/netcdf). Is there a way to open ftp site in file explorer and then quickly recursively download and then combine all of the files?
> Alternatively, ERSST data is available in ASCII, and the files span about 10 years each, and could be more easily combined. However, I don't know the best way to get GrADS to read that data. Is there an external utility that might allow me to convert the ASCII to netcdf?
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Jennifer M. Adams
Center for Ocean-Land-Atmosphere Studies (COLA)
111 Research Hall, Mail Stop 2B3
George Mason University
4400 University Drive
Fairfax, VA 22030
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