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Showing posts with the label Optimization

Is There A Faster Way To Add Two 2-d Numpy Array

Let say I have two large 2-d numpy array of same dimensions (say 2000x2000). I want to sum them ele… Read more Is There A Faster Way To Add Two 2-d Numpy Array

Python - Optimisation Of Perfect Number Search

p = [] for x in range(1, 50000000): count = 0 for y in range(1, x // 2 + 1): if (x … Read more Python - Optimisation Of Perfect Number Search

Should I Cache Range Results If I Reuse Them?

I'm relatively new to python, and I'm trying to optimize some code for a HackerRank problem… Read more Should I Cache Range Results If I Reuse Them?

Calculating The Factorial Without Trailing Zeros Efficiently?

I'm trying to improve the running time of the factorial calculation of the large number. The fi… Read more Calculating The Factorial Without Trailing Zeros Efficiently?

Find The Shortest Substring Whose Replacement Makes The String Contain Equal Number Of Each Character

I have a string of length n composed of letters A,G,C and T. The string is steady if it contains eq… Read more Find The Shortest Substring Whose Replacement Makes The String Contain Equal Number Of Each Character

How To Randomly Shift Rows Of A Numpy Array

I am looking for a more pythonic way of randomly shifting rows of a numpy array. The idea is that I… Read more How To Randomly Shift Rows Of A Numpy Array

Two Dimensional Optimization (minimization) In Python (using Scipy.optimize)

I am trying to optimize (minimize) a two dimensional function E(n,k) defined as follows: error=lamb… Read more Two Dimensional Optimization (minimization) In Python (using Scipy.optimize)

Optimizing Python Dictionary Lookup Speeds By Shortening Key Size?

I'm not clear on what goes on behind the scenes of a dictionary lookup. Does key size factor i… Read more Optimizing Python Dictionary Lookup Speeds By Shortening Key Size?

Scipy Minimize: How To Pass Args To Both The Objective And The Constraint

My MWE is as follows def obj(e, p): S = f(e) + g(p) return S I would like to minimize this… Read more Scipy Minimize: How To Pass Args To Both The Objective And The Constraint

Resolving How To Give An Attribute In A Class In Python

I have the following class: class Point(object): __slots__= ('x','y','z'… Read more Resolving How To Give An Attribute In A Class In Python

How To Write A Generator For Keras Model For Predict_generator

I have a trained keras model, and I am trying to run predictions with CPU only. I want this to be a… Read more How To Write A Generator For Keras Model For Predict_generator

Or-tools Solve Traveling Salesman (tsp) Without Returning To The Home Node

I'm using Google Or-Tools to solve a Traveling Salesman Problem by using this example (basicall… Read more Or-tools Solve Traveling Salesman (tsp) Without Returning To The Home Node

How Do I Properly Insert The Numbers That I Pressed On In My Calculator Into The Text Widget At The Last Index?

When I pres '100' for example, in the text box it outputs '001'. I try using -1 in … Read more How Do I Properly Insert The Numbers That I Pressed On In My Calculator Into The Text Widget At The Last Index?

How To Get "first-order Optimality" With Python Script

I curious about how to get 'first-order optimality' value using python script. For optimati… Read more How To Get "first-order Optimality" With Python Script

Mongodb Optimize Multiple Find_one + Insert Inside Loop

I'm using MongoDB 4.0.1 and Pymongo with pyhton 3.5. I have to loop over 12000 items every 30 -… Read more Mongodb Optimize Multiple Find_one + Insert Inside Loop

Ordereddict Performance (compared To Deque)

I've been trying to performance optimize a BFS implementation in Python and my original impleme… Read more Ordereddict Performance (compared To Deque)

Spark Pandas_udf Is Not Faster

I'm facing a heavy data transformation. In a nutshell, I have columns of data, each containing … Read more Spark Pandas_udf Is Not Faster

Estimate Of Inverse Hessian Using Scipy Minimization

I am using SciPy's 'minimize' function to minimize a function. The function returns the… Read more Estimate Of Inverse Hessian Using Scipy Minimization

How To Optimize Makespan Of Worker Labor To Maximum Time Usage Given A Set Of Possible Tasks

So I'm in a bit of a difficult algorithm modeling situation and I hope you guys can help me fin… Read more How To Optimize Makespan Of Worker Labor To Maximum Time Usage Given A Set Of Possible Tasks

Scipy Minimisation Optimisation Row-wise On Dataframe

TYPO FIXEDD I need to perform a minimization optimisation for each timestep in my timeseries. The o… Read more Scipy Minimisation Optimisation Row-wise On Dataframe