Bar Charts

[Jennifer Adams]

On Apr 21, 2008, at 4:32 AM, Steven Weiss wrote:

> Hi Jennifer,
>
> The skip and xlpos option works nicely!
>
> Only thing with the skip() is that the bars get spaced quite far  
> appart.
That's right, because you're skipping values, it won't let you draw  
over the gap between bars. GrADS keeps you honest.

> Any way I can get them closer to together?
> If I change the ctl file to 6hr steps, I get the bars as I need  
> them but the variables seem to return incorrect values.
> Gribmap is unhappy reports some errors which I think is part of the  
> problem.

The underlying data should always be the same, it's just a matter of  
how you map into onto your time axis. One way to check is to draw all  
the bars (no skip, 3hr increments) then open the 2nd data set (6hr  
increment) and overlay to make sure the data values are the same. If  
they aren't, then something's wrong with the way you've described the  
data. If gribmap is unhappy, send the output from gribmap -v and the  
relevant bits from your descriptor files.
Jennifer


>
> Regards
> Steven
> ----- Original Message -----
> From: Jennifer Adams
> To: GRADSUSR at LIST.CINECA.IT
> Sent: Friday, April 18, 2008 6:52 PM
> Subject: Re: Bar Charts
>
> Yes, skip() works on Z and T -- I will update the documentation.
>
> The "expr" argument must be a 1-D or 2-D grid, and the skipx and  
> skipy args should really be called skipi and skipj, since they skip  
> over the I and J dimensions of "expr".
> Jennifer
>
>
> On Apr 18, 2008, at 12:27 PM, Eric Altshuler wrote:
>
>> Hi Jennifer,
>>
>> I thought the skip function was only for horizontal dimensions  
>> (X,Y). You are suggesting that it also works for T (or even Z)?
>>
>> Eric
>>
>> ----- Original Message -----
>> From: "Jennifer Adams" <jma at COLA.IGES.ORG>
>> To: GRADSUSR at LIST.CINECA.IT
>> Sent: Friday, April 18, 2008 7:59:33 AM GMT -05:00 US/Canada Eastern
>> Subject: Re: Bar Charts
>>
>>
>>
>>
>> On Apr 16, 2008, at 8:31 AM, Steven Weiss wrote:
>>
>>
>>
>> Hi,
>>
>>
>> I solved the 3 hr interval issue below by changing the ctl file to  
>> 6hr
>> steps. The skip() function would have done the trick too:
>> set t 1 last
>> set x 1
>> set y 1
>> d skip(var,2)
>>
>>
>>
>>
>>
>>
>> Can anyone help me on the multiple lines for X axis???
>>
>>
>> Similar to the time step but I want to do my own labelling.
>> The following may achieve your desired result -- I used 'q gxinfo'  
>> to get the x and y limits of the plot, which were
>>
>> Page Size = 11 by 8.5
>> X Limits = 2 to 10.5
>> Y Limits = 0.75 to 7.75
>>
>>
>> Then I used these commands:Â
>>
>> 'set xlpos -0.4'
>> 'set xlabs k | l | m | n | o '
>> 'set grads off'
>> 'd t'
>> 'set line 0'
>> 'draw recf 1.98 0.27 10.52 Â 0.70'
>> 'set xlpos -0.2'
>> 'set xlabs f | g | h | i | j '
>> 'd t'
>> 'draw recf 1.98 0.47 10.52 Â 0.70'
>> 'set xlpos 0'
>> 'set xlabs a | b | c | d | e '
>> 'set ccolor 1'
>> 'd t'
>>
>>
>> Where t is a 1-dimensional time series. The labels "a" through "o"  
>> can be modified to suit your needs -- they can have more than one  
>> character and will be centered on each tic mark. The 'draw recf'  
>> commands are to cover up the extra axis line that you don't want  
>> to see. Another option is to use 'draw string' for each line of  
>> every tic label, but that may be more work than the above.Â
>>
>>
>> Jennifer
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> Regards
>> Steven
>>
>>
>> ----- Original Message -----
>> From: "Steven Weiss" < sweiss at IAFRICA.COM >
>> To: < GRADSUSR at LIST.CINECA.IT >
>> Cc: "Steven Weiss" < sweiss at IAFRICA.COM >
>> Sent: Friday, April 11, 2008 9:26 AM
>> Subject: Bar Charts
>>
>>
>>
>>
>>
>>
>> Hi,
>>
>>
>> I have 2 questions with regards to bar charts.
>>
>>
>> 1. I have grib in 3hr interval time steps. I want show a variable  
>> over 6hr
>> time steps. e.g   t 1, t 3, t 9 etc.. I cannot see any obvious  
>> way to do
>> this
>> from within a script.
>>
>>
>> 2. How can I print the x axis labels over multiple lines. I notice  
>> that by
>> default when the x axis labels are time steps, it prints the  
>> time,month
>> and
>> year of 3 lines. How can I embed a line break into the label?
>>
>>
>> Regards
>> Steven
>>
>>
>> --
>> Jennifer M. Adams
>> IGES/COLA
>> 4041 Powder Mill Road, Suite 302
>> Calverton, MD 20705
>> jma at cola.iges.org
>
> --
> Jennifer M. Adams
> IGES/COLA
> 4041 Powder Mill Road, Suite 302
> Calverton, MD 20705
> jma at cola.iges.org
>
>
>
>

--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org



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