contoura

 CONTOURA CONTOURA plot.
       CONTOURA(Z) is a contour plot of matrix Z treating the values in Z
       as heights above a plane.
       CONTOURA(X,Y,Z), where X and Y are vectors and Z is a matrix, specifies
       the X- and Y-axes used on the plot.
       CONTOURA(X,Y,Z), where X, Y, and Z are vectors, interpolates
       the data onto a rectangular grid.
       CONTOURA(Z,N) and CONTOURA(X,Y,Z,N) draw N contour lines, 
       overriding the default automatic value.
       CONTOURA(Z,V) and CONTOURA(X,Y,Z,V) draw LENGTH(V) contour lines 
       at the values specified in vector V.
       CONTOURA(...,'linetype') draws with the color and linetype specified,
       as in the PLOT command.

       C = CONTOURA(...) returns contour matrix C as described in CONTOURC
       and used by CLABEL.
       [C,H] = CONTOURA(...) returns a column vector H of handles to LINE
       objects, one handle per line. 
 
       NOTE: Do not rename this CONTOUR, it calls CONTOUR.
       See also CLABEL, CONTOURC, CONTOUR3, GRADIENT, QUIVER, PRISM.
   contoura(xzele(:,1),xzele(:,2),-porar(:,totalstep),1000)
   contoura(xzele(:,1),xzele(:,2),-porar(:,totalstep))
   contoura(xz(:,1),xz(:,2),disarz(:,totalstep))