[back] [prev] [next] [index] [root]

<p>&nbsp;<p>
<hr noshade size="5">
<h2><a name="BagWrite"></a>
BagWrite
</h2>

Writes a bag to an open file.

<p><p>

<h3>
Syntax:
</h3>
<pre>BagWrite (file, arg [,arg]); BagWrite("filename", arg [,arg]);</pre>

<p>

<table>
<tr>
<td>File</td>
<td><pre>  file  </pre></td>
<td></td>
</tr>
<tr>
<td>any expression</td>
<td><pre>  arg  </pre></td>
<td></td>
</tr>
</table>

<p>


See also:&nbsp;&nbsp;<a href="kashref.html#BagRead">BagRead</a>

<p>

<h3>
Description:
</h3>
<i>no detailed description available yet</i>

<p><p>

<p>
<hr>
<p>
<h3>
Example:
</h3>
Open new file for writing.
<pre>

kash> file:=Open("/tmp/dump","w");
Filename: /tmp/dump / Mode: w / Open (fid): 5
kash> f:=Poly(Zx,[1,0,-5]);;


</pre>

<p>

<p>
<hr>
<p>
<h3>
Example:
</h3>
Write data to file.
<pre>

kash> BagWrite(file,f);


</pre>

<p>

<p>
<hr>
<p>
<h3>
Example:
</h3>
Close file.
<pre>

kash> Close(file);
true


</pre>

<p>

<p>
<hr>
<p>
<h3>
Example:
</h3>
Open existing file for appending.
<pre>

kash> file:=Open("/tmp/dump","a");
Filename: /tmp/dump / Mode: a / Open (fid): 5


</pre>

<p>

<p>
<hr>
<p>
<h3>
Example:
</h3>
Append data to file.
<pre>

kash> o:=Order(f);;
kash> BagWrite(file,o);
kash> e1:=Elt(o,[1,0]/1);;
kash> e2:=Elt(o,1/1);;
kash> e3:=Elt(o,[-5,0]/1);;
kash> e4:=Elt(o,[1,1]/1);;
kash> BagWrite(file,e1,e2,e3,e4);
kash> M:=OrderMaximal(Order (o,[e1,e2,e3,e4]));;
kash> BagWrite(file,M);


</pre>

<p>

<p>
<hr>
<p>
<h3>
Example:
</h3>
Close file.
<pre>

kash> Close(file); 
true

</pre>

<p>

<p>
<hr>
<p>
<h3>
Example:
</h3>

Open existing file for reading.
<pre>

kash> file:=Open("/tmp/dump","r");
Filename: /tmp/dump / Mode: r / Open (fid): 5


</pre>

<p>

<p>
<hr>
<p>
<h3>
Example:
</h3>
Now, reread the data from this file. 
<pre>

kash> BagRead(file);
[ x^2 - 5 ]
kash> BagRead(file);
[ Generating polynomial: x^2 - 5
     ]
kash> BagRead(file);
[ 1, 1, -5, [1, 1] ]
kash> BagRead(file);
[    F[1]
        |
       F[2]
      /
     /
    Q
    F  [ 1]     Given by transformation matrix
    F  [ 2]     x^2 - 5
    Discriminant: 5 
     ]
kash> BagRead(file);
false


</pre>

<p>

<p>
<hr>
<p>
<h3>
Example:
</h3>
Close file.
<pre>

kash> Close(file);
> true

</pre>

<p>


<hr>

<p>
<a href="../kashref.html"><- back</a>[back] [prev] [next] [index] [root]