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Showing posts with the label Vectorization

Numpy Vectorize And Atomic Vectors

I would like to implement a function that works like the numpy.sum function on arrays as on expects… Read more Numpy Vectorize And Atomic Vectors

Vectorize Numpy Code With Operation Depending On Previous Value

The following code models a system that can sample 3 different states at any time, and the constant… Read more Vectorize Numpy Code With Operation Depending On Previous Value

Vectorized Solution To Conditional Dataframe Selection

I recently asked a question which was answered - How do I add conditionally to a selection of cell… Read more Vectorized Solution To Conditional Dataframe Selection

Interpolate Rows Simultaneously In Python

I am trying to vectorize my code and have reached a roadblock. I have : nxd array of x values [[x1… Read more Interpolate Rows Simultaneously In Python

How To Sample A Numpy Array And Perform Computation On Each Sample Efficiently?

Assume I have a 1d array, what I want is to sample with a moving window and within the window divid… Read more How To Sample A Numpy Array And Perform Computation On Each Sample Efficiently?

Vectorize Numpy Mean Across The Slices Of An Array

Is there a way to vectorize a function so that the output would be an array of means where each mea… Read more Vectorize Numpy Mean Across The Slices Of An Array

Pandas Vectorized Operation To Get The Length Of String

I have a pandas dataframe. df = pd.DataFrame(['Donald Dump','Make America Great Again!&… Read more Pandas Vectorized Operation To Get The Length Of String

Create A Matrix From A Function

I want to create a matrix from a function, such that the (3,3) matrix C has values equal to 1 if t… Read more Create A Matrix From A Function

Iterating Without For Loop In Numpy Array

I need to do logical iteration over numpy array, which's values depend on elements of other arr… Read more Iterating Without For Loop In Numpy Array

Countvectorizer On List Of Integers

I have list of integers as below: mylist = [111,113,114,115,112,115,234,643,565,.....] I have man… Read more Countvectorizer On List Of Integers

Efficiency Problem Of Customizing Numpy's Vectorized Operation

I have a python function given below: def myfun(x): if x > 0: return 0 else: … Read more Efficiency Problem Of Customizing Numpy's Vectorized Operation

Optimize This Function With Numpy (or Other Vectorization Methods)

I am computing with Python a classic calculation in the field of population genetics. I am well awa… Read more Optimize This Function With Numpy (or Other Vectorization Methods)

Numpy Vectorized 2d Array Operation Error

I'm trying to apply a vectorized function over a 2-d array in numpy row-wise, and I'm encou… Read more Numpy Vectorized 2d Array Operation Error

Vectorizing A Numpy Slice Operation

Say I have a Numpy vector, A = zeros(100) and I divide it into subvectors by a list of breakpoints… Read more Vectorizing A Numpy Slice Operation

How To Vectorize A Function That Uses Both Row And Column Elements Of A Dataframe

I have two inputs in a dataframe, and I need to create an output that depends on both inputs (same … Read more How To Vectorize A Function That Uses Both Row And Column Elements Of A Dataframe

Pandas Counting Occurrence Of List Contained In Column Of Lists

I have this Pandas DataFrame that has a column with lists: >>> df = pd.DataFrame({'m&#… Read more Pandas Counting Occurrence Of List Contained In Column Of Lists

Quickly Compute Eigenvectors For Each Element Of An Array In Python

I want to compute eigenvectors for an array of data (in my actual case, i cloud of polygons) To do … Read more Quickly Compute Eigenvectors For Each Element Of An Array In Python

Put Pairwise Differences Of Matrix Rows In 3-d Array

I have a matrix Y of shape (n, d). I already calculated the pairwise row-differences in the followi… Read more Put Pairwise Differences Of Matrix Rows In 3-d Array

Best Way To Vectorize Operation Having Input And Output History Dependence?

My goal is to vectorize the following operation in numpy, y[n] = c1*x[n] + c2*x[n-1] + c3*y[n-1] I… Read more Best Way To Vectorize Operation Having Input And Output History Dependence?

Tensorflow: Bincount With Axis Option

In TensorFlow, I can get the count of each element in an array with tf.bincount: x = tf.placeholder… Read more Tensorflow: Bincount With Axis Option