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Scientific Notation [message #62470]

Mon, 08 September 2008 16:02

Jeff[2]
Messages: 18
Registered: November 2007

Junior Member

Hello,

I have a trouble with a very large number... Comments are welcome!!!

I have the following data subset:

lat, long, data
-24.2 -56.3 234.4
-24.1 -56.2 456.5
-24.2 -56.2 NaN
-24.5 -56.3 232.4
-24.7 -52.3 NaN
....
I need to fill the NaN cells with 1.70171e38. I'm doing this:

index = where(finite(temp, /nan), count)
if count ne 0 then temp[index] = 1.70141e38

It works fine. Then I'm exporting it to an ascii file (using
output_to_ascii_doit) and I got:

-24.2 -56.3 234.4
-24.1 -56.2 456.5
-24.2 -56.2 ********************
-24.5 -56.3 232.4
-24.7 -52.3 *******************
....

How can I write this right number (1.70171e38) correctly?

Thanks!

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Re: Scientific Notation [message #62552 is a reply to message #62470]

Mon, 15 September 2008 11:31

kishore1818
Messages: 24
Registered: June 2007

Junior Member

On Sep 8, 8:02 pm, Jeff <julio.esque...@gmail.com> wrote:
> Hello,
>
> I have a trouble with a very large number... Comments are welcome!!!
>
> I have the following data subset:
>
> lat, long, data
> -24.2 -56.3 234.4
> -24.1 -56.2 456.5
> -24.2 -56.2 NaN
> -24.5 -56.3 232.4
> -24.7 -52.3 NaN
> ....
> I need to fill the NaN cells with 1.70171e38. I'm doing this:
>
> index = where(finite(temp, /nan), count)
> if count ne 0 then temp[index] = 1.70141e38
>
> It works fine. Then I'm exporting it to an ascii file (using
> output_to_ascii_doit) and I got:
>
> -24.2 -56.3 234.4
> -24.1 -56.2 456.5
> -24.2 -56.2 ********************
> -24.5 -56.3 232.4
> -24.7 -52.3 *******************
> ....
>
> How can I write this right number (1.70171e38) correctly?
>
> Thanks!

Hi,

Ok, but output you declared float but you are replacing exponential
format.
do this
temp[index] = 999.0 then it will workout.

Kishore

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