## [Solved] How to transform given dataset in python? [closed]

From your expected result, it appears that each “group” is based on contiguous id values. For this, you can use the compare-cumsum-groupby pattern, and then use agg to get the min and max values. # Sample data. df = pd.DataFrame( {‘id’: [1, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, … Read more

## [Solved] Python check if one value is greater than the next one in array/vector [duplicate]

Try looking at the diff function in numpy. That will give you the difference between each value and its right neighbor. You can then check if that value is smaller or larger than 0. 0 solved Python check if one value is greater than the next one in array/vector [duplicate]

## [Solved] Plot an ellipse with python 2.7 knowing the equation

The code you show does not represent the equation of the ellipse. It’s a bit hard to tell what exactly you were trying in that code, but the approach here is of course completely the same as in the linked question’s answer, namely to calculate the left hand side of the equation with a meshgrid … Read more

## [Solved] Image processing using Python and OpenCV on a Raspberry PI [closed]

all the computationally expensive stuff can be done in opencv. so using python for the wrapper won’t cost you much computationally. 4 solved Image processing using Python and OpenCV on a Raspberry PI [closed]

## [Solved] How do I make a function in python which takes a list of integers as an input and outputs smaller lists with only two values?

If you only want groups of two (as opposed to groups of n), then you can hardcode n=2 and use a list comprehension to return a list of lists. This will also create a group of one at the end of the list if the length of the list is odd: some_list = [‘a’,’b’,’c’,’d’,’e’] [some_list[i:i+2] … Read more

## [Solved] How to generate random sampling in python . with integers. with sum and size given

You can use random.gauss to generate 6 numbers around a mean with a certain standard deviation (closeness) and as per @PatrickArtner suggestion construct the 7th one, e.g. using 3 standard devs from mean: In []: import random vals = [int(random.gauss(341/7, 3)) for _ in range(6)] vals.append(341 – sum(vals)) vals, sum(vals), sum(vals)/7 Out[]: ([47, 47, 48, … Read more

## [Solved] Sort the order of dataframe columns based on the values in the bottom row

You were close. Try this: import pandas as pd df = pd.DataFrame({‘a’: [1, 2, 3], ‘b’: [ 4, 5, 2], ‘c’: [2, 4, 5]}) print(df) df = df[[x for _, x in sorted(zip(df.iloc[-1], df.columns), reverse=True)]] print(df) Starting DataFrame: a b c 0 1 4 2 1 2 5 4 2 3 2 5 Columns sorted … Read more

## [Solved] Read text files long text file in python

You have the # lines as a separation between your matrix. So if you loop line by line on your file, you can separate the matrix with this # lines, and built them : file = open(“file.txt”, “r”) lines = file.readlines() At this point, lines is a list. lines[i] is the line n° i+1 as … Read more

## [Solved] python plot error of incompatible dimensions with numpy array [closed]

Check the shape of the two input arrays to plot in plt.plot(tscale1, np.array(np.hstack((0., np.abs(uamp), 0.))), …) solved python plot error of incompatible dimensions with numpy array [closed]

## [Solved] How to generate increasing periodic sequences without using “if condition/loop/states”? [closed]

Yes, it is possible to find modulo (p) and sequence value (y) for given number x, but it requires using floating-arithmetics logarithm. pow = Floor(Log2(x+1)) p = 1 << pow y = 1 + (x + 1) % p For initial period s (3 in your second example) pow = Floor(Log2((x + s – 1) … Read more