Re: Covariance matrix syntax

://tinyurl.com/y29mule6 https://tinyurl.com/yxtg4tce Best Regards, Markos Em 19-10-2020 02:23, Meghna Karkera escreveu: Dear Sir I am unable to find the *formula for covariance* used in np.cov syntax in PYTHON given in link https://numpy.org/doc/stable/reference/generated/numpy.cov.html. Could you

Errors in testing the SciPy installation

d I do? Thank you, Markos -- https://mail.python.org/mailman/listinfo/python-list

Re: I can't access dataframe fields

Hi MRAB, I changed last_cluster to tuple(last_cluster). From: print (updated_distance_matrix_df.loc [clusters [i], last_cluster]) to print (updated_distance_matrix_df.loc [clusters [i], tuple(last_cluster)]) And worked. Thank you, Markos Em 15-02-2020 23:36, MRAB escreveu: On 2020-02

I can't access dataframe fields

ce_matrix_df [clusters [i], last_cluster]) gives the error: TypeError: unhashable type: 'list' A last_cluster variable is of type list: print (last_cluster, type (last_cluster)) ['P3', 'P6'] And a variable cluster [i] is a string: print (clusters [i], type (cluster

Re: Most efficient way to replace ", " with "." in a array and/or dataframe

Em 22-09-2019 13:10, Piet van Oostrum escreveu: Markos writes: Hi, I have a table.csv file with the following structure: , Polyarene conc ,, mg L-1 ,,, Spectrum, Py, Ace, Anth, 1, "0,456", "0,120", "0,168" 2, "0,456", "0,040", "0

Re: Most efficient way to replace ", " with "." in a array and/or dataframe

Em 22-09-2019 13:10, Piet van Oostrum escreveu: Markos writes: Hi, I have a table.csv file with the following structure: , Polyarene conc ,, mg L-1 ,,, Spectrum, Py, Ace, Anth, 1, "0,456", "0,120", "0,168" 2, "0,456", "0,040", "0

Most efficient way to replace "," with "." in a array and/or dataframe

f there is another, more "efficient" way to make this change without having to "iterate" all elements of the array with a loop "for". Also I'm also wondering if there would be any benefit of making this modification in dataframe before extracting the numeric fields to the array. Please, any comments or tip? Thanks you, Markos -- https://mail.python.org/mailman/listinfo/python-list

Re: Matplotlib import image as float32

Em 01-07-2019 18:03, Chris Angelico escreveu: On Tue, Jul 2, 2019 at 6:59 AM Markos wrote: Hi, I observed that matplotlib reads an image file (PNG) as float32: Please, how to read this file as int8 to get RGB in range of 0-255? Thank you, Markos import numpy as np import

Matplotlib import image as float32

Hi, I observed that matplotlib reads an image file (PNG) as float32: Please, how to read this file as int8 to get RGB in range of 0-255? Thank you, Markos import numpy as np import matplotlib.pyplot as plt import matplotlib.image as mpimg imagem = mpimg.imread('lenna.png'

Re: Difference between array( [1,0,1] ) and array( [ [1,0,1] ] )

[ [2, 6],    [4, 8] ] ] ) Thank you, Markos Em 21-06-2019 07:44, edmondo.giovanno...@gmail.com escreveu: Every array in numpy has a number of dimensions, "np.array" is a function that can create an array numpy given a list. when you write vector_1 = np.array([1,2,1]) y

Difference between array( [1,0,1] ) and array( [ [1,0,1] ] )

1, 3) The transpose on vector_1 don't work: vector_1.T array([1, 0, 1]) But the transpose method in vector_2 works fine: vector_2.T array([[1],    [0],    [1]]) I thought that both vectors would be treated as an matrix of 1 row and 3 columns. Why this difference? Any tip? Th

Re: How to install matplotlib in Debian 9

Em 08-06-2018 20:11, Jim Lee escreveu: On 06/08/2018 11:54 AM, Markos wrote: Hi, I'm starting my studies with Python 3 on Debian 9 that I just installed. I have to install the matplotlib module, but I am in doubt what is the difference of the commands: pip3 install matplotlib or

How to install matplotlib in Debian 9

h are installed? Thanks, Markos -- https://mail.python.org/mailman/listinfo/python-list

Re: OpenCV with Python (cv or cv2)

in the repository for python 3.4.2-2 and 2.7.9-1 My doubt is which version of Python (3.4.2-2 or 2.7.9-1) is compatible with the opencv library 2.4.9 available in the repository? Thanks for your attention, Markos On 28-05-2015 01:47, Laura Creighton wrote: Your cmake output doesn't me

Re: OpenCV with Python (cv or cv2)

Hi Laura, On 26-05-2015 11:21, Laura Creighton wrote: In a message of Tue, 26 May 2015 10:24:30 -0300, Markos writes: Hi, I want to use OpenCV with Python. I installed version 2.4.9 (http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.4.9/opencv-2.4.9.zip/) in debian

OpenCV with Python (cv or cv2)

realized I could use the cv module. (import cv) But still I do not understand the differences between the modules cv and cv2. Do you suggest any good tutorial about the differences between cv and cv2? I will have to make many changes in python programs using cv to reuse the code later wi

Idle - ImportError: No module named numpy

ecent call last): File "", line 1, in import numpy as np ImportError: No module named numpy How configure idle to load the numpy module? Thanks, Markos -- https://mail.python.org/mailman/listinfo/python-list

How to install i1636

Please, How to install the ia636 library on Debian (Squeeze) with Python 2.6? Thank you, Markos -- https://mail.python.org/mailman/listinfo/python-list