Broken example: threespin-analysis

[HKaras]

The threespin analysis example does not work anymore.

I have tried to investigate it in more detail locally on my computer and I can not get a good fit.

Can someone who knows more about three spin models have a look?

Current output:

Goodness-of-fit: 
========= ============= ============== ===================== ======= 
 Dataset   Noise level    Reduced 𝛘2    Residual autocorr.    RMSD   
========= ============= ============== ===================== ======= 
   #1         0.015         88.247             1.951          0.133  
   #2         0.012         87.558             1.963          0.106  
   #3         0.018         19.508             1.900          0.077  
========= ============= ============== ===================== ======= 
Model parameters: 
=========== ========== ========================= ====== =========================================== 
 Parameter   Value      95%-Confidence interval   Unit   Description                                
=========== ========== ========================= ====== =========================================== 
 lam1_1      0.010      (0.010,0.010)                    Amplitude of pairwise pathway #1           
 reftime1    0.400      (0.400,0.400)              μs    Refocusing time of pairwise pathway #1     
 lamu_1      0.500      (0.500,0.500)                    Amplitude of unmodulated pairwise pathway  
 conc        50.001     (49.999,50.003)            μM    Spin concentration                         
 rmean1      3.000      (3.000,3.000)              nm    Average inter-spin distance  #1            
 rmean2      3.000      (3.000,3.000)              nm    Average inter-spin distance  #2            
 rmean3      3.000      (3.000,3.000)              nm    Average inter-spin distance  #3            
 chol11      0.400      (0.400,0.400)              nm    Cholesky factor ℓ11                        
 chol22      0.400      (0.400,0.400)              nm    Cholesky factor ℓ22                        
 chol33      0.400      (0.400,0.400)              nm    Cholesky factor ℓ33                        
 chol21      0.00e+00   (frozen)                   nm    Cholesky factor ℓ21                        
 chol31      0.00e+00   (frozen)                   nm    Cholesky factor ℓ31                        
 chol32      0.00e+00   (frozen)                   nm    Cholesky factor ℓ32                        
 lam1_2      0.010      (0.010,0.010)                    Amplitude of pairwise pathway #1           
 lamu_2      0.500      (0.500,0.500)                    Amplitude of unmodulated pairwise pathway  
 lam1_3      0.010      (0.010,0.010)                    Amplitude of pairwise pathway #1           
 lamu_3      0.500      (0.500,0.500)                    Amplitude of unmodulated pairwise pathway  
 scale_1     0.304      (0.283,0.325)             None   Overall echo amplitude/scale               
 scale_2     0.484      (0.467,0.501)             None   Overall echo amplitude/scale               
 scale_3     0.654      (0.642,0.665)             None   Overall echo amplitude/scale               
=========== ========== ========================= ====== =========================================== 

[stestoll]

Luis tried to fix this, but was not able to do so. Probably some issue with the solver and algebra backend. It used to work when Luis had the MLK backend installed.

We should just remove this example.