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<A HREF = "index.html">[Index for ./FEM]</A> |
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<A HREF = "../index.html">[Return to Master Index]</A> |
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<H1>basis2d</H1> |
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<H2>(./FEM/basis2d.m)</H2> |
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<HR><H3>Function Synopsis</H3> |
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<pre>[phi,jj]=basis2d(fem_grid_struct,xylist,j)</pre> |
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<HR><H3>Help text</H3> |
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<pre> |
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BASIS2D compute basis functions for input points in FEM grid |
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BASIS2D computes the FEM basis functions for a given |
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horizontal position, specified either in the argument |
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list or with the mouse. |
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|
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In determining which element has been selected, |
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BASIS2D needs elemental areas and shape functions. |
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Element areas are returned by <A HREF = "../3.FEM/loadgrid.html">LOADGRID</A>. |
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The routine <A HREF = "../3.FEM/belint.html">BELINT</A> computes shape function information |
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and attaches it to the input <A HREF = "../3.FEM/fem_grid_struct.html">fem_grid_struct</A>. |
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These two functions MUST be run before BASIS2D will |
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run. |
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<A HREF = "../3.FEM/belint.html">BELINT</A> is run as: |
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new_struct=<A HREF = "../3.FEM/belint.html">belint</A>(<A HREF = "../3.FEM/fem_grid_struct.html">fem_grid_struct</A>); |
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If ever needed, <A HREF = "../3.FEM/el_areas.html">EL_AREAS</A> is run as: |
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[new_struct,ineg]=<A HREF = "../3.FEM/el_areas.html">el_areas</A>(<A HREF = "../3.FEM/fem_grid_struct.html">fem_grid_struct</A>); |
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INPUT : <A HREF = "../3.FEM/fem_grid_struct.html">fem_grid_struct</A> - (from <A HREF = "../3.FEM/loadgrid.html">LOADGRID</A>, see <A HREF = "../3.FEM/fem_grid_struct.html">FEM_GRID_STRUCT</A>) |
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xylist (op) - points to find elements for [n x 2 double] |
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j (op) - element list corresponding to the xylist |
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set of points. Optional, but isf passed in, |
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points will not be relocated. length(j) must |
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equal length(xylist). |
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OUTPUT : basis function(s) and element number(s) |
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If elements were NOT passed in, then providing two output |
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arguments will collect the elements determined to contain the |
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specified points. |
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CALL : >> [phi,j]=basis2d(<A HREF = "../3.FEM/fem_grid_struct.html">fem_grid_struct</A>) for interactive |
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or |
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>> [phi,j]=basis2d(<A HREF = "../3.FEM/fem_grid_struct.html">fem_grid_struct</A>,xylist) |
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or |
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>> phi=basis2d(<A HREF = "../3.FEM/fem_grid_struct.html">fem_grid_struct</A>,xylist,j) |
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|
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Written by : Brian O. Blanton |
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Summer 1998 |
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|
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</pre> |
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<HR><H3>Cross-Reference Information</H3>This function calls |
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<pre><UL> |
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<LI><A HREF = "../3.FEM/findelem.html">findelem</A> ./FEM/findelem.m</LI> |
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<LI><A HREF = "../3.FEM/is_valid_struct.html">is_valid_struct</A>./FEM/is_valid_struct.m</LI> |
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<LI><A HREF = "../3.FEM/is_valid_struct2.html">is_valid_struct2</A>./FEM/is_valid_struct2.m</LI> |
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</UL></pre> |
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<HR> |
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Produced by <A HREF="http://www.nd.edu/Courses/kantor/matlab/mat2html">mat2html</A> on Tue Feb 2 16:15:45 EST 1999 |
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