Categories
Mastering Development

Python PyQt5 – QCheckbox to add and remove itens from a list

I’m building a user interface with PyQt5 (and python 3.7) which I’m using a check box to add elements in a general list (input_columns_general) when it’s checked and remove/delete then when unchecked. Every time when I check a check box the added elements must follow a default position order in the specific list. With this […]

Categories
Mastering Development

Separate string column in data.table in multiple columns in R

Imagine I have a R data.table with following string column: string a1; b: b1, b2, b3; c: c1, c2, c3 a1; b: b2, b3, b4; c: c1, c2, c3; d: d1, d2, d3 a2; b: b1, b2, b3; c: c2, c5, c6; d: d1, d2, d3; e: e2, e3, e4 a5; b: b5, b6, b7; […]

Categories
Mastering Development User Help

Formula to copy a cell from another worksheet where the name of worksheet to be copied from varies

I have a workbook with a worksheet containing the following: Destination Worksheet The data in cells B1, C1, D1 need to be equal to the value of cells A1, A2, A3 in a worksheet in same workbook named DOD11.2 (i.e. the name of the worksheet is the same as the letters up to the character […]

Categories
Ask Mathematics

Counting polysticks on the $n$-cube.

Over at Code Golf Stack Exchange, I put up a challenge asking people to count, among other things, the number of ways to take an $n$-cube and color $k$ (connected) edges up to isometries of the $n$-cube. Let’s call this number $C(n,k)$. For example, when $n=3$ (the ordinary cube) and $k=4$, $C(3,4) = 4$ as […]

Categories
Ask Mathematics

Counting polysticks on the $n$-cube.

Over at Code Golf Stack Exchange, I put up a challenge asking people to count, among other things, the number of ways to take an $n$-cube and color $k$ (connected) edges up to isometries of the $n$-cube. Let’s call this number $C(n,k)$. For example, when $n=3$ (the ordinary cube) and $k=4$, $C(3,4) = 4$ as […]

Categories
Mastering Development

Python pandas append dataframe with array content to hdf file

How can I append a dataframe to another dataframe which is already saved in a file without loading it from the file? (Python 3.6 & Pandas 1.0.1) Example: import pandas as pd data = [[[‘A01′,’A02′],’B0′,’C0’],[[‘A11′,’A12′],’B1′,’C1’],[[‘A21′,’A22′],’B2′,’C2’]] df = pd.DataFrame(data,columns=[‘A’,’B’,’C’]) data2 = [[[‘A31′,’A32′],’B3′,’C3’],[[‘A41′,’A42′],’B4′,’C4’],[[‘A51′,’A52′],’B5′,’C5’]] df2 = pd.DataFrame(data2,columns=[‘A’,’B’,’C’]) print(df.append(df2,ignore_index=True)) #version 1: store = pd.HDFStore(‘test.h5′,’a’) store.append(key=’foo’,value=df)#, format=’t’, data_columns=True) store.append(key=’foo’,value=df2)#, format=’t’, […]

Categories
Mastering Development

Transforming non-structured data (concatenated strings of text) into consumable, readable format / extracting datapoints from strings

I’m trying to extract specific datapoints from string of text and have a hard time figuring out how to do so. What I need to achieve is to extract dates from a specific string. The string structure is as follows: Product: XX1, Made by: WWW ZZZ, Date: YYYY-MM-DD; and it can be repeated multiple times […]

Categories
Mastering Development

Spread unique values (in multiple columns) to different columns and paste aggregated values

I have a dataframe as below: structure(list(Value = c(1, 2, 3, 4), col1 = structure(c(1L, 1L, 2L, 2L), .Label = c(“A1”, “A2”), class = “factor”), col2 = structure(c(1L, 2L, 2L, 1L), .Label = c(“B1”, “B2”), class = “factor”), col3 = structure(1:4, .Label = c(“C1”, “C2”, “C3”, “C4”), class = “factor”)), class = “data.frame”, row.names = […]

Categories
Development

Seg faulting in function print_helper()

I am working on a project for school and for the life of me I cannot understand why I’m seg faulting when running. The seg fault occurs in on the line “if(current->left)”. I’m confused as to why I would not be able to access it. #include <iostream> #include “huffman_tree.h” #include “min_heap.h” using namespace std; void […]

Categories
Development

Getting a “Legend group” in Javascript when data comes from a URL?

I am reading a csv file and plotting data using c3. I would like to customize the legend (make legend groups). The legend contains many items (I have 31 plots). I would like to form 4 groups so that the user could enable/disable each group. Here is a snippet of my code: var chart = […]