[ncl-talk] exponential format for label bar

[Mary Haley]

Zhifeng,

I still can't reproduce this problem using the numbers you gave me.  I get
exponential labels by default, using either a vertical or horizontal
labelbar.

Can you try the attached program and let me know what you get?

It would help if I can get your data and script.

If you are calling gsn_csm_contour or gsn_csm_contour_map, then you can set
the following special resource:

res at gsnDebugWriteFileName = "formary"

and it will cause the data that is being contoured to be written to a
NetCDF file called "formary.nc", and it will create a pared down NCL script
that you can send me called formary.ncl.

You can send me the two files offline if you like, or use our ftp:

http://www.ncl.ucar.edu/report_bug.shtml#HowToFTP

Thanks,

--Mary



On Mon, Mar 20, 2017 at 10:16 AM, Zhifeng Yang <yangzf01 at gmail.com> wrote:

> Hi Mary,
>
> Maybe it’s better to tell you the maximum and minimum data. The data range
> from -0.00001 to 0.00001. And I want contour levels with 0.0000001
> interval. If you have any data in hand, you can simply divid by a big
> number for the whole data, then get very small data, then you can draw with
> very small data.
>
> Thank you for your concern, Mary.
>
> Zhifeng
>
> On Mar 20, 2017, at 10:40 AM, Mary Haley <haley at ucar.edu> wrote:
>
> Zhifeng,
>
> What you are setting looks correct.
>
> I was going to try to create an example so I could make sure this resource
> works as expected, but it's hard to get NCL to do a mix of exponential and
> fractional labels.
>
> Can you either provide the data you are trying to contour or else tell me
> what the exact min/max is of your data, and what contour levels you are
> using, and I'll see if I can reproduce the problem.
>
> Thanks,
>
> --Mary
>
>
> On Sun, Mar 19, 2017 at 8:01 PM, Zhifeng Yang <yangzf01 at gmail.com> wrote:
>
>> Hi Dennis,
>>
>> I tried
>>
>> cres at cnLineLabelFormat= "0@!;*^se"
>> But it doesn’t work. I also used other combination. It seems no effect at
>> all.
>>
>> Thank you
>> Zhifeng
>>
>> On Mar 19, 2017, at 6:53 PM, Dennis Shea <shea at ucar.edu> wrote:
>>
>> http://www.ncl.ucar.edu/Applications/tickmarks.shtml
>> Example 8
>>
>> may be what you want.
>>
>> On Sun, Mar 19, 2017 at 4:01 PM, Zhifeng Yang <yangzf01 at gmail.com> wrote:
>>
>>> Hi
>>>
>>> I use some very small numbers to plot contour image. Since they are very
>>> small, like -0.000001, the label bar looks very wield. So I want to display
>>> the small number as exponential format on the label bar, such as -1.0e(-6)
>>> or -1.0*10^-6, rather than -0.000001. Do you have any ideas?
>>>
>>> Thank you
>>> Zhifeng
>>>
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