R_funcMap_160921

R_funcMap_160921

Last update: 2016/11/30 14:10

参考文献

Rで学ぶデータ・プログラミング入門

by 石田基広さん

web

naming conventions

error

line 1 did not have 920 elements

Error: unexpected input in "_"

R Stduio

ウィンドウ

RGui

R Console

列を表示

View()

コマンドヒストリ

onlineツール

rollapp

数値

c()

データプロット

複素数

複素共役

Conj()

typeof()

オブジェクトのタイプを見る

演算

剰余 %%

TRUE / FALSE

sum(x)

TRUEの数を数える

データ構造

データフレーム

Sleepオブジェクト

summary()

作成例 x<-data.frame(Idx=1:3, Name=c("Tuvok","7of9","Janeway"))

nrow(), ncol()

str()

特定の部分だけ変更する実装

データ操作

ノイズ付加

jitter()

ある横軸範囲のデータだけ関数の値に置き換える

スプライン補間

Spline Editorからデータを作成

splinefun

線形補間 + ノイズ付加

approx()

jitter()

特定の行列範囲の数値の四捨五入 round()

R > データ操作 / データフレーム > read.tableで読込んだリストの特定行を削除する > x[-6,]

コメント

#

文字列代入

二重引用符

一重引用符

names()

names()使用例

複数実行

文; 文

rep()

行連結文字

フォルダ

getwd(), setwd()

データセット

サブセット x[1:5]

2行目から600行目まで

length()

列データを行データに変換

データ読み込み

read.table()

列の取り出し

グラフ

plot()

y軸の設定

plot()

type="b"

複数データセットを載せる

table() + barplot()

関数の図示

ロジスティック曲線

重森三玲 > 八陣の庭

サンプルデータ

LETTERS

Titanic

datasets:XXX

統計

異なる実装環境で計算した結果を比較

plot()

cor()

lsfit() + residuals

R / 統計 > 切片を0とした回帰直線の式

名前付き引数

seq(to=5, from=1)

help.search()

関数やデータの説明を見る

関数名だけ

関数の処理内容が表示される

sample

rep

sample()

rep=TRUE / FALSE

文字列操作

strsplit(x, "")

paste(x, collapse="")

比較

==

sample(x,3,rep=T)==c("zun","zun","doko")

要素探索

which(x %in% c("zun","doko"))

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