analysis | 易学教程

How to categorize and tabularize free-form answers to a question in a survey?

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问题 I want to analyze answers to a web survey (Git User's Survey 2008 if one is interested). Some of the questions were free-form questions, like "How did you hear about Git?". With more than 3,000 replies analyzing those replies entirely by hand is out of the question (especially that there is quite a bit of free-form questions in this survey). How can I group those replies (probably based on the key words used in response) into categories at least semi-automatically (i.e. program can ask for

Getting the AST of a function

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问题 Say I have a function: function hi() print('hi') end I'd like to be able to take this function as an argument and perform analysis on it, such as listing all the function calls in it, seeing all the variables it references, etc. Note that I'm not talking about analysing source code ; I don't have the source text of the function, I just have the function object, i.e. this is being done at runtime. The way I think you'd go about doing this is to get the AST of the function. But I don't know how

C++, Eclipse CDT code analysis?

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问题 Are there any good plugins for static code analysis for Eclipse CDT? I found two so far: Cppcheck plugin, but this still needs the original cppcheck executable CppChecker, but this didn't work (it didn't do anything) Are there any more that are better? Or how do I get CppChecker to do something (or is it a static code analyiser at all? the website is not clear at all)? 回答1: There is another called "Codan," stands for CODe ANalysis. It can be reviewed at this wiki, with links to the tool: http

Algorithm for ranking popular blog posts

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问题 I am building a blog aggregator like Techmeme that finds most popular posts from several blogs. Unlike Techmeme, first, I aggregate blog posts from a variety of RSS feeds, then save the headlines and relevant URLs in database. After that, I have to find what the most popular blog posts are. For defining top blog post headlines, I track Facebook and Twitter share counts for every post of every blog and I rank the blog posts for their share counts. But that isn't the best solution because some

Elasticsearch custom analyzer for hyphens, underscores, and numbers

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问题 Admittedly, I'm not that well versed on the analysis part of ES. Here's the index layout: { "mappings": { "event": { "properties": { "ipaddress": { "type": "string" }, "hostname": { "type": "string", "analyzer": "my_analyzer", "fields": { "raw": { "type": "string", "index": "not_analyzed" } } } } } }, "settings": { "analysis": { "filter": { "my_filter": { "type": "word_delimiter", "preserve_original": true } }, "analyzer": { "my_analyzer": { "type": "custom", "tokenizer": "whitespace",

Coq case analysis and rewrite with function returning subset types

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I was working is this simple exercise about writing certified function using subset types. The idea is to first write a predecessor function pred : forall (n : {n : nat | n > 0}), {m : nat | S m = n.1}. and then using this definition give a funtion pred2 : forall (n : {n : nat | n > 1}), {m : nat | S (S m) = n.1}. I have no problem with the first one. Here is my code Program Definition pred (n : {n : nat | n > 0}) : {m : nat | S m = n.1} := match n with | O => _ | S n' => n' end. Next Obligation. elimtype False. compute in H. inversion H. Qed. But I cannot workout the second definition. I

StandardScaler with Pipelines and GridSearchCV

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I've put standardScaler on the pipeline, and the results of CV_mlpregressor.predict(x_test), are weird. I think i must have to bring the values back from the standardScaler, but still can't figure how. pipe_MLPRegressor = Pipeline([('scaler', StandardScaler()), ('MLPRegressor', MLPRegressor(random_state = 42))]) grid_params_MLPRegressor = [{ 'MLPRegressor__solver': ['lbfgs'], 'MLPRegressor__max_iter': [100,200,300,500], 'MLPRegressor__activation' : ['relu','logistic','tanh'], 'MLPRegressor__hidden_layer_sizes':[(2,), (4,),(2,2),(4,4),(4,2),(10,10),(2,2,2)], }] CV_mlpregressor = GridSearchCV

How many primitive operations in a simple loop?

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问题 I have a bunch of code to find the primitive operations for. The thing is that there aren't really many detailed resources out on the web on the subject. In this loop: for i:=0 to n do print test end How many steps do we really have? In my first guess I would say n+1 considering n for the times looping and 1 for the print. Then I thought that maybe I am not precise enough. Isn't there an operation even to add 1 to i in every loop? In that matter we have n+n+1=2n+1. Is that correct? 回答1: The

Is there a way to get a list of all the CSS applied to a HTML fragment or page?

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I know it's easy to get the CSS that is applied to a single node in HTML, using tools like the Firebug extension for Firefox, etc. But is there a way to see all the CSS that is in effect on an entire page, or a larger fragment of HTML? Specifically, we are cleaning up our one extremely large CSS file into smaller modules and would like to find out what CSS is used on a certain page, so we can move all the non-used CSS to another module. Thank you all! These are the various solutions I've looked at now from your recommendations (collected here for people with the same problem): Dust-Me

Among MATLAB and Python, which one is good for statistical analysis? [closed]

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Which one among the two languages is good for statistical analysis? What are the pros and cons, other than accessibility, for each? nielsle MATLAB Good for beginners Good for interactive sessions Python (with SciPy ) Good for slightly experienced programmers Good for creating reusable applications Good for reading and exporting data files Free of cost If SciPy doesn't provide all the functionality out of the box, then you may have to go searching on the Internet. I am not an expert on geostatistics, but here is a mail with some starting pointers. http://mail.scipy.org/pipermail/scipy-user/2007