English 中文(简体)
我如何根据该数据范围内的价值从数据框架中提取价值?
原标题:How can I extract a value from a dataframe based on values within that dataframe?
  • 时间:2024-03-02 02:41:36
  •  标签:
  • r
  • dataframe

我有以下数据:

library(tidyverse)

table <- tibble(
  points = 0:10,
  energy = c(0, 120, 240, 300, 380, 500, 600, 780, NA, NA, NA),
  cost = c(0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0)
)

我正试图写出一项具有价值的职能,即将其与<代号>能源/代码”中的数值相对应的措施,然后退回相关的<代码>值。

迄今为止,我可以理解一个基本机制,以便按照以下几条来推断:

energy_points <- function(energy_input) {
table_one %>%
  filter(energy == energy_input) %>%
  pull(points)
}

然而,我的职能的预期运作是,它研究的是能源——投入价值和在分配分数之前的“安排”检查。

So a value of 125 is greater than 120 and less than 241, so returns a points of 1. A value of 120 is not greater than 120 so returns a points of 0. Some more expected outputs if helpful:

energy_input points
50 0
120 0
121 1
240 1
241 2

www.un.org/Depts/DGACM/index_spanish.htm 我怎么能写这一职务,以便检查表格中的价值范围?

问题回答

您可按最高<代码>能源和代之;投入:

energy_points <- function(energy_input) {
  with(
    table, 
    points[[max(which(energy < energy_input))]]
  )
}

# test
input <- c(50, 120, 121, 240, 241, 780, 781)

data.frame(input, output = sapply(input, energy_points))
#   input output
# 1    50      0
# 2   120      0
# 3   121      1
# 4   240      1
# 5   241      2
# 6   780      6
# 7   781      7




相关问题
How to plot fitted model over observed time series

This is a really really simple question to which I seem to be entirely unable to get a solution. I would like to do a scatter plot of an observed time series in R, and over this I want to plot the ...

REvolution for R

since the latest Ubuntu release (karmic koala), I noticed that the internal R package advertises on start-up the REvolution package. It seems to be a library collection for high-performance matrix ...

R - capturing elements of R output into text files

I am trying to run an analysis by invoking R through the command line as follows: R --no-save < SampleProgram.R > SampleProgram.opt For example, consider the simple R program below: mydata =...

R statistical package: wrapping GOFrame objects

I m trying to generate GOFrame objects to generate a gene ontology mapping in R for unsupported organisms (see http://www.bioconductor.org/packages/release/bioc/vignettes/GOstats/inst/doc/...

Changing the order of dodged bars in ggplot2 barplot

I have a dataframe df.all and I m plotting it in a bar plot with ggplot2 using the code below. I d like to make it so that the order of the dodged bars is flipped. That is, so that the bars labeled "...

Strange error when using sparse matrices and glmnet

I m getting a weird error when training a glmnet regression. invalid class "dgCMatrix" object: length(Dimnames[[2]]) must match Dim[2] It only happens occasionally, and perhaps only under larger ...

Generating non-duplicate combination pairs in R

Sorry for the non-descriptive title but I don t know whether there s a word for what I m trying to achieve. Let s assume that I have a list of names of different classes like c( 1 , 2 , 3 , 4 ) ...

Per panel smoothing in ggplot2

I m plotting a group of curves, using facet in ggplot2. I d like to have a smoother applied to plots where there are enough points to smooth, but not on plots with very few points. In particular I d ...

热门标签