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[MUG] easiest way to write
| [MUG] easiest way to write |
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Author: Maple User Group
Posted: Thu, 13 Feb 2003 09:08:56 -0500
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>> From: Maple User Group "maple_gr"
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To: "maple-list"
Subject: easiest way to write calculated data to a file with Maple ?
From: Joe Riel "joer"
Date: 30 Jan 2003 22:17:37 -0800
"jim fukuyama" "jim_fukuyama" writes:
> >> From: "jim fukuyama" "jim_fukuyama"
>
> Greetings,
>
> I am running an iterative equation that plots hundreds of variable
> points for a given parameter value...how exactly do write to a file
> the following example data ?
>
> counter point parameter
> 1 2.4533 3.2
> 2 2.46 3.2
>
> I saw previous internet postings that all were different, I am looking for
> the easiest way for a beginner...
Well there is more than one way to handle this,
so expect more than one answer. You didn't specify
the release of Maple that you are using,
I'll assume R6 or greater.
I'm not sure what you meant by "an iterative equation",
but will assume that your program has a loop and that
you want to print stuff each time through. An easy
way to do that is
file := fopen("<filename>",'WRITE'); # substitute <filename> with the actual filename
try
<start loop>
fprintf(file,"%d %.4f %.2f", counter, point, parameter)
<end loop>
finally fclose(file)
end try;
Note that the loop is enclosed in a `try' statement that includes
a `finally' statement that closes the file. This is important,
otherwise an error in your loop will leave the file open.
Look up help for `fprintf' to understand the format.
Joe Riel
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To: "maple-list"
Subject: easiest way to write calculated data to a file with Maple ?
From: Joe Riel "joer"
Date: 30 Jan 2003 22:53:28 -0800
"jim fukuyama" "jim_fukuyama" writes:
One more thing, which I invariably forget on the first try.
If you use fprintf, be sure to add a `\n' at the end of the string.
For example
fprintf(file,"%d %.3f %.2f\n", counter,point,parameter)
Joe
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From: Stanley J Houghton "S.J.Houghton"
Date: Fri, 31 Jan 2003 16:50:43 +0000
To: "maple-list"
Subject: easiest way to write calculated data to a file with Maple ?
This explained with examples in the help pages for functions fopen,
fprintf and fclose.
Just type fprintf and hit F1. The example you want is at the end of
the help page (at least in my version).
Stan
On Fri, 24 Jan 2003 04:24:23 +0000 jim fukuyama
"jim_fukuyama" wrote:
>
> >> From: "jim fukuyama" "jim_fukuyama"
>
> Greetings,
>
> I am running an iterative equation that plots hundreds of variable
> points for a given parameter value...how exactly do write to a file
> the following example data ?
>
> counter point parameter
> 1 2.4533 3.2
> 2 2.46 3.2
>
> I saw previous internet postings that all were different, I am looking for
> the easiest way for a beginner...
>
> Any help is appreciated !!
>
> Jim
>
>
>
>
>
> _________________________________________________________________
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