frequency

问题 Structure of input dataframe ds= structure(list(MSISDN = c(800, 800, 783, 975, 800)), .Names = "Number", row.names = c(NA, -5L), class = "data.frame") Need a simple output which looks like below (not able to add single break) Num Freq 800 3 975 1 783 1 回答1: Check out Tabyl function from janitor package. It does the task that you want plus a bit more library(janitor) ds <- structure(list(MSISDN = c(800, 800, 783,975, 800)), .Names = "Number", row.names = c(NA,-5L), class = "data.frame") tabyl

来源： https://stackoverflow.com/questions/64238152/numpy-fast-stable-arg-sort-of-large-array-by-frequency

来源： https://stackoverflow.com/questions/64238152/numpy-fast-stable-arg-sort-of-large-array-by-frequency

问题 I'm trying to understand what the -c and -F options of perf record really do but I cannot explain what I'm seeing. I'm running these commands: perf record -a -F <frequency> sleep 1 and perf record -a -c <count> sleep 1 trying different values of frequency and count . The results I get are the following In the first table I set the frequency and in the second one the count. How do frequency and count affect the number of events? I thought the number of events was independent on the frequency

问题 I want to make an app like this. This app is mosquito repellent app which produces sound of some frequency. I don't want it to limit to one sound. I want to generate and play sounds of different frequencies for different purposes. How can I do that in swift IOS. How I can create sound of a specific frequency in swift ios? 回答1: Swift 4.2: create this class in your project. import Foundation import AudioUnit import AVFoundation final class ToneOutputUnit: NSObject { var auAudioUnit: AUAudioUnit

问题 I have to plot a wordcloud. 'tweets.csv' is a Pandas dataframe which has a column named 'text'. The ploted graph hasn't been based on the most common words, tough. How can the words sizes be linked to their frequencies in dataframe? text = df_final.text.values wordcloud = WordCloud( #mask = logomask, max_words = 1000, width = 600, height = 400, #max_font_size = 1000, #min_font_size = 100, normalize_plurals = True, #scale = 5, #relative_scaling = 0, background_color = 'black', stopwords =

问题 I have to plot a wordcloud. 'tweets.csv' is a Pandas dataframe which has a column named 'text'. The ploted graph hasn't been based on the most common words, tough. How can the words sizes be linked to their frequencies in dataframe? text = df_final.text.values wordcloud = WordCloud( #mask = logomask, max_words = 1000, width = 600, height = 400, #max_font_size = 1000, #min_font_size = 100, normalize_plurals = True, #scale = 5, #relative_scaling = 0, background_color = 'black', stopwords =

问题 I'm looking to create a frequency table in R for a certain variable (INTERVIEW_DAY) , but taking into account another variable as weight (WEIGHT). I've tried to do that with the package data.table . I would love to do it with the R-Base Package though. Below you'll find the type of table I want, but still not weighted, which is what I'm looking to learn. Data (variables TUCASEID, INTERVIEW_DAY, and WEIGHT): TUCASEID INTERVIEW_DAY WEIGHT 1 2.00301e+13 5 8155462.7 2 2.00301e+13 6 1735322.5 3 2

问题 The code below is for the ArrayList of String. I want to know what's the complexity of the Collections.frequency() function. List<String> list = new ArrayList<>(); list.add("sample"); list.add("sample1"); list.add("sample"); list.add("sample"); list.add("sample"); list.add("sample"); System.out.println("sample is repeated : " + Collections.frequency(list, "sample")); 回答1: Collections.frequency has the following implementation (in Java 9): public static int frequency(Collection<?> c, Object o)

问题 This question already has an answer here : How to get frequency of word in a sentence in R? (1 answer) Closed 6 years ago . if I have a vector x <- c("ajjss","acdjfkj","auyjyjjksjj") and do: y <- x[grep("jj",x)] table(y) I get: y ajjss auyjyjjksjj 1 1 However the second string "auyjyjjksjj" should count the substring "jj" twice. How can I change this from a true/false computation, to actually counting the frequency of "jj"? Also if for each string the frequency of the substring divided by the