【error】Input arguments for contourc must be of type ‘double’

contourc – Low-level contour plot computation

C = contourc(Z)

computes the contour matrix from data in matrix Z, where Z must be at least a 2-by-2 matrix. The contours are isolines(等值线) in the units of Z. The number of contour lines and the corresponding values of the contour lines are chosen automatically.

  • C is a two-row matrix specifying all the contour lines.
  • Each contour line defined in matrix C begins with a column that contains the value of the contour (specified by v and used by clabel), and the number of (x,y) vertices in the contour line.
  • The remaining columns contain the data for the(x,y) pairs.
C = [value1 xdata(1) xdata(2) ... xdata(dim1) value2 xdata(1) xdata(2) ... xdata(dim2)...
			dim1 ydata(1) ydata(2) ... ydata(dim1) dim2 ydata(1) ydata(2) ... ydata(dim2)];

Specifying irregularly spaced x and y vectors is not the same as contouring irregularly spaced data. If x or y is irregularly spaced, contourc calculates contours using a regularly spaced contour grid, then transforms the data to x or y.

 

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