Jaehyeon Kim jaehyeon-kim
jaehyeon-kim
/ concat.R
Created
July 21, 2016 09:17
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| library(dplyr) | |
| library(magrittr) | |
| set.seed(1237) | |
| set_df <- function() { | |
| data.frame(MRN = sample(1:5, 10, replace = TRUE), source = sample(letters[1:20], 10), value = sample(1:10, 10)) | |
| } | |
| df1 <- set_df() | |
| df2 <- set_df() |
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| <head> | |
| <title>meteor-poc</title> | |
| </head> | |
| <body> | |
| <div class="container-fluid"> | |
| <h2>Old Faithful Geyser Data</h2> | |
| <div class="row"> | |
| <div class="col-sm-4"> | |
| <div class="well"> |
jaehyeon-kim
/ global.R
Created
April 14, 2016 23:15
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| if(!require(shiny)) install.packages("shiny") | |
| if(!require(shinythemes)) install.packages("shinythemes") | |
| library(shiny) | |
| library(shinythemes) | |
| source("ui.R") | |
| source("server.R") | |
| shinyApp(ui, server) |
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| ui_login <- function() { | |
| fluidRow( | |
| tags$head(tags$style(HTML(".container-fluid {margin: 25px;}"))), | |
| column(2, offset = 5, | |
| div(id = "login_div", | |
| wellPanel( | |
| h4("LOGIN"), | |
| textInput("username", "User name"), | |
| passwordInput("password", "Password"), | |
| br(), |
jaehyeon-kim
/ hospay.R
Created
December 21, 2015 04:39
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| hospay <- data.frame(foo = "abc", Payment = c("$1,000","$200"), Lower.estimate = "$100", Higher.estimate = "$100", stringsAsFactors = FALSE) | |
| cols <- grep("Payment|*estimate", names(hospay)) | |
| hospay[,cols][] <- lapply(hospay[,cols], function(x) as.numeric(gsub("[$,]", "", x))) | |
| str(hospay) | |
| #'data.frame': 2 obs. of 4 variables: | |
| #$ foo : chr "abc" "abc" | |
| #$ Payment : num 1000 200 | |
| #$ Lower.estimate : num 100 100 | |
| #$ Higher.estimate: num 100 100 |
jaehyeon-kim
/ test.sh
Created
November 28, 2015 10:47
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| sudo apt-get update | |
| sudo apt-get install openssh-server | |
| sudo ufw allow 22 |
jaehyeon-kim
/ s3_sample.R
Created
July 2, 2015 01:37
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| ### S3 Class | |
| ## setting up independent classes and methods | |
| # setting up line by line | |
| die <- list(trial = character(0)) | |
| class(die) <- "Die" | |
| coin <- list(trial = character(0)) | |
| class(coin) <- "Coin" | |
| # setting up by constructors |
jaehyeon-kim
/ oop_trial.R
Created
June 19, 2015 06:46
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| ### S3 Class | |
| ## set up classes and methods | |
| die <- list(trials = character(0)) | |
| class(die) <- "Die" | |
| coin <- list(trials = character(0)) | |
| class(coin) <- "Coin" | |
| reset <- function(obj) { | |
| UseMethod("reset", obj) |
jaehyeon-kim
/ subset_app.R
Last active
August 29, 2015 14:23
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| ### Subsetting applications | |
| ## lookup tables (character subsetting) | |
| x <- c("m","f","u","f","f","m","m") | |
| lookup <- c(m = "Male", f = "Female", u = NA) | |
| lookup[x] | |
| unname(lookup[x]) | |
| ## matching and merging by hand (integer subsetting) | |
| grades <- c(1, 2, 2, 3, 1) | |
| info <- data.frame(grade = 3:1, desc = c("Excellent", "Good", "Poor"), fail = c(F, F, T)) |
jaehyeon-kim
/ logi.R
Created
June 4, 2015 11:43
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| ## linear regression | |
| ols <- lm(speed ~ dist, data = cars) | |
| olsCoef <- ols$coefficients | |
| # prediction is made by X * beta or beta_0 + beta_1*x_1+ ... + beta_k*x_k | |
| olsX <- model.matrix(speed ~ dist, data = cars) | |
| olsPred <- olsX %*% olsCoef | |
| as.vector(head(olsPred)) | |
| [1] 8.615041 9.939581 8.946176 11.926392 10.932987 9.939581 |