hi

i have 2 questions

- i have a parametric plot :

T=np.linespace(things)

X=f(T)*np.cos(T)

Y=f(T)*np.sin(T)

i would like to get the first and the last point of this polar curve

in the specs of "linspace" (https://docs.scipy.org/doc/numpy/reference/generated/numpy.linspace.html) i dont see how to do that automatically

is there something simple like "first(X)" and "last(X)"

- i have a function :

rotation(vect,theta) which takes vect=[a,b] and theta-rotates it by a matrix

how to use this function or such a function to rotate a tuple (X,Y) with X,Y as described above in this message ?

        ––––––––––––––––––––––––––
                  Vincent Douce

               :=: Mathoscope :=:

             http://mathoscope.xyz

                 06°13°11°07°26

          Bagnères de Bigorre 65200

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