>> sincos_test

SINCOS_TEST:
  Demonstrate the use of spinterp to construct an
  interpolant to the function z(x,y) = sin(x) + cos(y)

c = 

               vals: {[145x1 double]}
           gridType: 'Chebyshev'
                  d: 2
              range: [2x2 double]
           maxLevel: 5
        estRelError: 2.5905e-16
        estAbsError: 7.7716e-16
         fevalRange: [-1 2]
         minGridVal: [0 1]
         maxGridVal: [0.5000 0]
            nPoints: 145
          fevalTime: 0.0340
    surplusCompTime: 0.0171
            indices: [1x1 struct]



  Grid points added at level 0

  Col:       1             2       
  Row
      1 :         0.5           0.5  


  Grid points added at level 1

  Col:       1             2       
  Row
      1 :           0           0.5  
      2 :           1           0.5  
      3 :         0.5             0  
      4 :         0.5             1  


  Grid points added at level 2

  Col:       1             2       
  Row
      1 :    0.146447           0.5  
      2 :    0.853553           0.5  
      3 :           0             0  
      4 :           1             0  
      5 :           0             1  
      6 :           1             1  
      7 :         0.5      0.146447  
      8 :         0.5      0.853553  


  Grid points added at level 3

  Col:       1             2       
  Row
      1 :   0.0380602           0.5  
      2 :    0.308658           0.5  
      3 :    0.691342           0.5  
      4 :     0.96194           0.5  
      5 :    0.146447             0  
      6 :    0.853553             0  
      7 :    0.146447             1  
      8 :    0.853553             1  
      9 :           0      0.146447  
     10 :           1      0.146447  
     11 :           0      0.853553  
     12 :           1      0.853553  
     13 :         0.5     0.0380602  
     14 :         0.5      0.308658  
     15 :         0.5      0.691342  
     16 :         0.5       0.96194  


  Grid points added at level 4

  Col:       1             2       
  Row
      1 :  0.00960736           0.5  
      2 :   0.0842652           0.5  
      3 :    0.222215           0.5  
      4 :    0.402455           0.5  
      5 :    0.597545           0.5  
      6 :    0.777785           0.5  
      7 :    0.915735           0.5  
      8 :    0.990393           0.5  
      9 :   0.0380602             0  
     10 :    0.308658             0  
     11 :    0.691342             0  
     12 :     0.96194             0  
     13 :   0.0380602             1  
     14 :    0.308658             1  
     15 :    0.691342             1  
     16 :     0.96194             1  
     17 :    0.146447      0.146447  
     18 :    0.853553      0.146447  
     19 :    0.146447      0.853553  
     20 :    0.853553      0.853553  
     21 :           0     0.0380602  
     22 :           1     0.0380602  
     23 :           0      0.308658  
     24 :           1      0.308658  
     25 :           0      0.691342  
     26 :           1      0.691342  
     27 :           0       0.96194  
     28 :           1       0.96194  
     29 :         0.5    0.00960736  
     30 :         0.5     0.0842652  
     31 :         0.5      0.222215  
     32 :         0.5      0.402455  
     33 :         0.5      0.597545  
     34 :         0.5      0.777785  
     35 :         0.5      0.915735  
     36 :         0.5      0.990393  

  Grid plot stored as "sincos_grid.png".

  Maximum approximation error at 25 random points is 5.55112e-16

  Interpolant plot stored as "sincos_interp.png".
>>