numpy_开发者

How to "scale" a numpy array?

I would开发者_开发技巧 like to scale an array of shape (h, w) by a factor of n, resulting in an array of shape (h*n, w*n), with the.[详细]

2023-04-06 17:39 分类：问答

Save .dta files in python

I\'m wonderin开发者_开发知识库g if anyone knows a Python package that allows you to save numpy arrays/recarrays in the .dta format of the statistical data analysis software Stata. This would really sp[详细]

2023-04-06 17:14 分类：问答

How to reference numpy array objects?

I have numpy array: >>> data dtype([(\'date\', \'|O4\'), (\'value\', \'<f8\')] where date ob开发者_运维问答ject is Python datetime.date object which consists of all days in one year:[20[详细]

2023-04-06 13:15 分类：问答

Matrix multiplication for sparse matrices in Python

I want to multiply a sparse matrix A, with a matrix B which has 0, -1, or 1 as elements. To reduce the complexity of the matrix multiplication, I can ignore items if they are 0, or go ahead and add th[详细]

2023-04-06 12:57 分类：问答

Equivalent of named tuple in NumPy?

Is it possible to create a NumPy object that behaves very much like a c开发者_如何转开发ollections.namedtuple, in the sense that elements can be accessed like so:[详细]

2023-04-06 10:02 分类：问答

How to convert Python dictionary object to numpy array

I have python dict object with key as datetime.date object and values as tuple objects: >>> data_d开发者_StackOverflowict[详细]

2023-04-06 09:26 分类：问答

How to multiply a scalar throughout a specific column within a NumPy array?

I need to do some analysis on a large dataset from a hydrolgeology field work. I am using NumPy. I want to know how I can:[详细]

2023-04-06 09:00 分类：问答

matplotlib.pcolor very slow. alternatives?

I want to plot a 2D array (roughly 1000x1000) with the values corresponding to a color scale. So I used matplotlib.pcolor, which did just that but for some reason it is super slow when it gets to thos[详细]

2023-04-06 08:33 分类：问答