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Letter frequencies: plot a histogram ordering the values PYTHON

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问题 What I am trying to do is to analyse the frequency of the letters in a text. As an example, I will use here a small sentence, but all that is thought to analyse huge texts (so it's better to be efficient). Well, I have the following text: test = "quatre jutges dun jutjat mengen fetge dun penjat" Then I created a function which counts the frequencies def create_dictionary2(txt): dictionary = {} i=0 for x in set(txt): dictionary[x] = txt.count(x)/len(txt) return dictionary And then import numpy

Multiply one dictionary by another in Swift

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问题 Currently, I have a nested dictionary declared as : let VitamineARetinol = "VitamineARetinol" let VitamineABetacarotene = "VitamineABetacarotene" let VitamineC = "VitamineC" let VitamineD = "VitamineD" let Calories = "Calories" typealias ListOfAliment = [String: [String: Double]] let Data: ListOfAliment = [ "Orange": [VitamineARetinol: 0.5, VitamineC: 0.3, VitamineD: 0.98, Calories: 160], "Pomme": [VitamineARetinol: 0.2, VitamineC: 0.2, VitamineD: 0.38, Calories: 120], "Poire":

pass array of map coordinates to a draw a route on map in swift

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问题 hi I have an array of coordinates data like this, which is retrieved from an API call, and I use a for loop to append the data into an array like this: extension TripListViewController: UITableViewDelegate { func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { performSegue(withIdentifier: Constants.segueTripListToTripMap, sender: indexPath) tableView.deselectRow(at: indexPath, animated: true) } override func prepare(for segue: UIStoryboardSegue, sender: Any?) { if

pass array of map coordinates to a draw a route on map in swift

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How to initialize a structure field std::map<std::string, std::string> called params

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问题 I'm trying to initialize a structure using some data being held in a std::vector<tokens> - tokens are simply strings. My struct is: struct parsedBlock{ std::string name; std::map<std::string, std::string> params; } parsedBlock block; tokens[0] is block.name so it's simple to just write block.name = tokens[0] But the question is how to intialize a params field supposing that key is tokens[i] and value is tokens[i+1] . Thanks in advance. Greetings! 回答1: I guess your "tokens" vector contains the

C# 表达式树 Expression

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表达式树是定义代码的数据结构。它们基于编译器用于分析代码和生成已编译输出的相同结构。几种常见的表达式 BinaryExpression 包含二元运算符的表达式 1 BinaryExpression binaryExpression = Expression.MakeBinary(ExpressionType.Add,Expression.Constant( 1 ),Expression.Constant( 2 )); 2 Console.WriteLine(binaryExpression.ToString()); // (1+2) 不进行溢出检查 3 binaryExpression = Expression.MakeBinary(ExpressionType.AddChecked, Expression.Constant( 3 ), Expression.Constant( 4 )); 4 Console.WriteLine(binaryExpression.ToString()); // (3+4) 进行溢出检查 5 binaryExpression = Expression.MakeBinary(ExpressionType.Subtract, Expression.Constant( 5 ), Expression.Constant( 6 )); 6 Console

dynamically create string from three data frames

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问题 Dynamically create string from pandas column I have three data frame like below one is df and another one is anomalies:- d = {'10028': [0], '1058': [25], '20120': [29], '20121': [22],'20122': [0], '20123': [0], '5043': [0], '5046': [0]} df1 = pd.DataFrame(data=d) Basically anomalies in a mirror copy of df just in anomalies the value will be 0 or 1 which indicates anomalies where value is 1 and non-anomaly where value is 0 d = {'10028': [0], '1058': [1], '20120': [1], '20121': [0],'20122': [0]

Count occurance of number from given range

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问题 My objective is to count the frequency of number in num_lst to the range in num_range. And display the output to a dictionary where key is the range, value is the frequencies of numbers within the range from num_lst. I've seen many posts and most are using numpy or pandas to solve it. However I want to find traditional ways to solve this without using np and pd. Can anyone give me the right direction. num_range = [(0.0, 20.0), (20.0, 40.0), (40.0, 60.0), (60.0, 80.0), (80.0, 100.0)] num_lst =

Count occurance of number from given range

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Generate typed dictionary with a for loop using an enum as key type but without using `?` to mark undefined in TypeScript

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问题 The problem is that I want to use enum as key for a dictionary but I want to dynamically generate the entries using a loop. But I will prefer not to use ? operator because I know I'll fill all keys and I don't want to force ! evaluation for each call. enum Students { A, B, C, // many many students } // class Info(); // some properties like grades and teacher const studentInfo: { [key in Students]: Info }; // won't work const must be initialized const studentInfo: { [key in Students]: Info } =