matrix.html

一个通用的数学库

    <TT> &nbsp; </TT>
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      Submatrix Access  
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    <TT> A.sub_matrix(row_start, row_finish, col_start, col_finish)
</TT>
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    <TT> &nbsp; </TT>
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      Number of rows  
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    <TT> A.nrows()
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    <TT> &nbsp; </TT>
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      Number of columns  
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    <TT> A.ncols()
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    <TT> &nbsp; </TT>
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      Number of non-zero elements (really number of stored elements)  
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    <TT> A.nnz()
</TT>
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    <TT> &nbsp; </TT>
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      Sub part of bandwidth  
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    <TT> A.sub()
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    <TT> &nbsp; </TT>
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      Super part of bandwidth  
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    <TT> A.super()
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    <TT> &nbsp; </TT>
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      Whether the main <A HREF="diagonal.html" >diagonal</A> is all ones, and hence not stored  
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    <TT> A.is_unit()
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    <TT> &nbsp; </TT>
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      Whether the <A HREF="matrix.html" >matrix</A> has elements stored only in the upper <A HREF="triangle.html" >triangle</A>  
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    <TT> A.is_upper()
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    <TT> &nbsp; </TT>
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      Whether the <A HREF="matrix.html" >matrix</A> has elements stored only in the upper <A HREF="triangle.html" >triangle</A>  
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    <TT> A.is_lower()
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    <TT> &nbsp; </TT>
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<TD VALIGN=BOTTOM><FONT FACE=arial,helvetica SIZE=+1><B>Function specification</B></FONT>
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<TABLE BORDER>
<TR>
<TH>Name</TH>
<TH>Function</TH>
<TH>Complexity</TH>
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      Iterate over OneD slices  
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    <TT>iterator begin()</TT>
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    <TD><FONT FACE=Times SIZE=3>
     constant time

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      Const Iterator Begin  
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    <TT>const_iterator begin()</TT>
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    <TD><FONT FACE=Times SIZE=3>
     constant time

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      Iterator End  
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    <TT>iterator end()</TT>
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    <TD><FONT FACE=Times SIZE=3>
     constant time

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    <TD><FONT FACE=Times SIZE=3>
      Const Iterator End  
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    <TT>const_iterator end()</TT>
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    <TD><FONT FACE=Times SIZE=3>
     constant time

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      Reverse Iterator Begin  
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    <TT>reverse_iterator rbegin()</TT>
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    <TD><FONT FACE=Times SIZE=3>
     constant time

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    <TD><FONT FACE=Times SIZE=3>
      Const Reverse Iterator Begin  
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    <TT>const_reverse_iterator rbegin()</TT>
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    <TD><FONT FACE=Times SIZE=3>
     constant time

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      Reverse Iterator End  
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    <TT>reverse_iterator rend()</TT>
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    <TD><FONT FACE=Times SIZE=3>
     constant time

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    <TD><FONT FACE=Times SIZE=3>
      Const Reverse Iterator End  
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    <TT>const_reverse_iterator rend()</TT>
    </TD>
    <TD><FONT FACE=Times SIZE=3>
     constant time

    </FONT></TD>	
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    <TD><FONT FACE=Times SIZE=3>
      Element Access  
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    <TT>reference operator()(size_type i, size_type j)</TT>
    </TD>
    <TD><FONT FACE=Times SIZE=3>
     constant for <A HREF="dense.html" >dense</A>, linear for sparse

    </FONT></TD>	
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      Const Element Access  
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    <TT>const_reference operator()(size_type i, size_type j)</TT>
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    <TD><FONT FACE=Times SIZE=3>
     constant for <A HREF="dense.html" >dense</A>, linear for sparse

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      OneD Access  
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    <TT>OneDRef operator[](size_type i)</TT>
    </TD>
    <TD><FONT FACE=Times SIZE=3>
     constant

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    <TD><FONT FACE=Times SIZE=3>
      Const OneD Access  
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    <TD VALIGN="TOP">
    <TT>const OneDRef operator[](size_type i)</TT>
    </TD>
    <TD><FONT FACE=Times SIZE=3>
     constant

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    <TD><FONT FACE=Times SIZE=3>
      Number of rows  
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    <TD VALIGN="TOP">
    <TT>size_type nrows()</TT>
    </TD>
    <TD><FONT FACE=Times SIZE=3>
     constant time

    </FONT></TD>	
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    <TD><FONT FACE=Times SIZE=3>
      Number of columns  
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    <TD VALIGN="TOP">
    <TT>size_type ncols()</TT>
    </TD>
    <TD><FONT FACE=Times SIZE=3>
     constant time

    </FONT></TD>	
    </TR>
  

  
    <TR>
    <TD><FONT FACE=Times SIZE=3>
      Number of non-zero elements (really number of stored elements)  
    </FONT></TD>	
    <TD VALIGN="TOP">
    <TT>size_type nnz()</TT>
    </TD>
    <TD><FONT FACE=Times SIZE=3>
     constant time

    </FONT></TD>	
    </TR>
  

  

  

  

  

  

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<TD VALIGN=BOTTOM><FONT FACE=arial,helvetica SIZE=+1><B>Invariants</B></FONT>
</TD></TR><TR><TD>

</TD></TR>


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<TD VALIGN=BOTTOM><FONT FACE=arial,helvetica SIZE=+1><B>Models</B></FONT>
</TD></TR><TR><TD>
<UL>
<LI> <A HREF="row_matrix.html" >row_matrix</A>
<LI> <A HREF="column_matrix.html" >column_matrix</A>
<LI> <A HREF="diagonal_matrix.html" >diagonal_matrix</A>
<LI> <A HREF="triangle_matrix.html" >triangle_matrix</A>
<LI> <A HREF="symmetric_matrix.html" >symmetric_matrix</A>

</UL>

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<TD VALIGN=BOTTOM><FONT FACE=arial,helvetica SIZE=+1><B>Notes</B></FONT>
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</TD></TR>


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<TD VALIGN=BOTTOM><FONT FACE=arial,helvetica SIZE=+1><B>See also</B></FONT>
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