Questions tagged [scipy-optimize-minimize]
446 questions
0
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1 answer
ValueError: `f0` passed has more than 1 dimension
Dimension error appears when trying to call minimize function
import numpy as np
import math
import scipy
from scipy import optimize
from scipy.optimize import minimize, line_search
x1=[1,2,1] ; y1=0
x2=[1,1,2] ; y2=0
x3=[2,3,3] ; y3=1
x4=[2,2,1] ;…
0
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0 answers
Determining Best Fit Center of Scattered 3D Points
I am attempting to find the center of several sets of 3D points on a sphere. Each set is comprised of three or more points that fall on the arc of a circle, but not perfectly as they have been supplied by an object detection algorithm, so there is…
Bvdb89
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How to set the bounds of scipy.optimize.minimize()?
Im trying to minimize function(T) by scipy.optimize.minimize().
With 0 < T < 1.
My code is the following:
import scipy
import math
def function(T):
'''
U = (1- sqrt(T)^(-2)
1 - T^3 * (1 - T - U) ^ 5 * U ^ 10
'''
return 1 -…
bibols
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Dictionary of Constraints Python SciPy.Optimize
I'm working on creating a dictionary of constraints for a large SCED power problem for minimization. However, I'm being given a ValueError saying an unknown type is passed despite only using Optimize.LinearConstraints at present. When I change to…
Demetra Salls
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- 1
0
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2 answers
Imposing monotonicity with scipy.optimize.minimize
I am trying to minimize a function of a vector of length 20, but I want to constrain the solution to be monotonic, i.e.
x[1] <= x[2]... <= x[20]
I have tried to implement this in the following way using "constraints" for this routine:
cons =…
Lili FN
- 101
0
votes
2 answers
How to use scipy `minimize` on a difference between two vectors?
I have two vectors w1 and w2 (each of length 100), and I want to minimize the sum of their absolute difference i.e.
import numpy as np
def diff(w: np.ndarray) -> float:
"""Get the sum of absolute differences in the vector w.
Args:
…
PyRsquared
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- 86
0
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1 answer
Scipy Optimize Minimize: Optimization terminated successfully but not iterating at all
I am trying to code an optimizer finding the optimal constant parameters so as to minimize the MSE between an array y and a generic function over X. The generic function is given in pre-order, so for example if the function over X is x1 + c*x2 the…
Alex Ferrando
- 13
- 2
0
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2 answers
How many function evaluations executed between 2 iterations in Scipy minimize
I am using scipy minimize function, mostly the BFGS method. I need to find how many function evaluation were executed between 2 following iterations. This function evaluation usually aim to calculate numerical derivatives.
If it is possible to find…
Tamuzd
- 33
- 3
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1 answer
Fitting 2 experimental datasets using scipy - chemical reaction - SOLVED
Long time lurking, first time posting.
I am working with a chemical system that is detected only for a certain period of time, so I will have the reaction and the decay of the signal. The equation is given by:
Derivative(GL, t): (-k*GL) -…
Karen DOS SANTOS
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- 1
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1 answer
Scipy.optimize.minimize function results in wrong results. Equal to inital values, stops after 1 iteration
I am trying to execute a minimize function from Scipy however I am receiving wrong answers and it stops after a single iteration.
Problem introduction:
When I got this code running I would like to optimize a reactor size, the variables are therefore…
Aike
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- 1
0
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0 answers
How to define the constrains and bounds of scipy.optimize.minimize
I have two matrix r and w. r is a (3,4) matrix which is constant and w is a (4,3) matrix which is variable and the target I'm trying to optimize
r = [[0.1,0.15,0.03,0.2],
[0.1,0.15,0.11,0.1],
[-0.3,0.37,0.25,-0.1]]
-I want to minimize the…
xlian
- 1
- 2
0
votes
1 answer
Performing scipy.optimize.minimize with Martin Eastwood's MPE formula
I have difficulty performing scipy.optimize.minimize with Martin Eastwood's interpolation formula—
z=(x^w1/(x^w2+y^w3))*w4 * 17 (we get 16 instead of 17
while x[3], x[4], x[16], x[18] reside in the formula)
My data set (17/12/12…
user19119603
0
votes
1 answer
finding Intersection using scipy.optimize.minimize
I'm trying to find x of intersection between two simple math functions using only scipy.optimize.minimize
I found the point successfully using (fsolve)
fsolve(lambda t: f1(t) - f2(t), x0)
but I'm limited to using only minimize and I couldn't find…
zoro
- 3
- 1
0
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1 answer
Callback gradient norm from scipy.minimise (python)
I am using scipy.minimize with the 'CG' method and I want to callback the gradient norm at each iteration. So far, I have been able to call back the function at each iteration using this:
def min_method(fn, grad, x0):
all_fn = [fn(x0).item()]
…
lrisley
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0
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1 answer
How to use scipy minimization with GPU in google collab?
I had to change my runtime type to GPU in collab as otherwise, the RAM was crashing. However, when I use GPU I am getting an error while executing the scipy minimization. The error is as follows :-
------Start--------
Traceback (most recent call…
Jeet
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