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JuliaApproximation / ApproxFun.jl

Julia package for function approximation
http://juliaapproximation.github.io/ApproxFun.jl/
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Print 0 in (1,1) entry of the Derivative matrix #543

Closed dlfivefifty closed 6 years ago

dlfivefifty commented 7 years ago

I keep giving talks and have to explain that the numbers are actually in the superdiagonal:

ConcreteDerivative:Chebyshev(【-1.0,1.0】)→Ultraspherical(1,【-1.0,1.0】)
   1.0                                           
        2.0                                      
             3.0                                 
                  4.0                            
                       5.0                       
                            6.0                  
                                 7.0             
                                      8.0        
                                           9.0   
                                                ⋱
                                                ⋱
dlfivefifty commented 6 years ago

Now there's dots.