1. A tidy version of the Lucky Iron Fish data can be found in the Lecture...
1. A tidy version of the Lucky Iron Fish data can be found in the Lecture Datasets (tidy) section of the Blackboard course page. The file is titled lif.csv. Read the LIF data into R. a. Assume that we are interested in computing the average dissolved iron over all experimental conditions, but we realized that the lemon juice we had used in the experiment had been contaminated. Using R, compute the median ferrious iron release (fe2) after removing or filtering out lemon juice and tap water. Note that the function median can be used to compute the median. Paste your R code/output into your solutions.
| Acid | pH | rep | fe2 | tot_iron | acid_ph | ||
| Tap Water | 7.19 | 0 | 0.6 | 0.56 | Tap Water-7.19 | ||
| Tap Water | 7.19 | 0 | 0.6 | 0.36 | Tap Water-7.19 | ||
| Tap Water | 7.19 | 0 | 0.6 | 0.32 | Tap Water-7.19 | ||
| Ascorbic Acid | 4 | 1 | 30.10239 | 29.25 | Ascorbic Acid-4 | ||
| Ascorbic Acid | 4 | 2 | 23.27645 | 25.18 | Ascorbic Acid-4 | ||
| Ascorbic Acid | 4 | 3 | 28.56655 | 30.87 | Ascorbic Acid-4 | ||
| Ascorbic Acid | 4.5 | 1 | 4.607509 | 9.261 | Ascorbic Acid-4.5 | ||
| Ascorbic Acid | 4.5 | 2 | 5.494881 | 11.03 | Ascorbic Acid-4.5 | ||
| Ascorbic Acid | 4.5 | 3 | 4.914676 | 11.05 | Ascorbic Acid-4.5 | ||
| Ascorbic Acid | 5 | 1 | 0.6 | 2.497 | Ascorbic Acid-5 | ||
| Ascorbic Acid | 5 | 2 | 0.6 | 2.687 | Ascorbic Acid-5 | ||
| Ascorbic Acid | 5 | 3 | 0.6 | 4.094 | Ascorbic Acid-5 | ||
| Ascorbic Acid | 5.5 | 1 | 0.6 | 0.335 | Ascorbic Acid-5.5 | ||
| Ascorbic Acid | 5.5 | 2 | 0.6 | 1.112 | Ascorbic Acid-5.5 | ||
| Ascorbic Acid | 5.5 | 3 | 0.6 | 0.4022 | Ascorbic Acid-5.5 | ||
| Lemon Juice | 4 | 1 | 14.30034 | 36.2 | Lemon Juice-4 | ||
| Lemon Juice | 4 | 2 | 26.72355 | 39.03 | Lemon Juice-4 | ||
| Lemon Juice | 4 | 3 | 21.77474 | 26.2 | Lemon Juice-4 | ||
| Lemon Juice | 4.5 | 1 | 2.116041 | 18.26 | Lemon Juice-4.5 | ||
| Lemon Juice | 4.5 | 2 | 5.085324 | 20.89 | Lemon Juice-4.5 | ||
| Lemon Juice | 4.5 | 3 | 2.696246 | 17.41 | Lemon Juice-4.5 | ||
| Lemon Juice | 5 | 1 | 0.6 | 11.89 | Lemon Juice-5 | ||
| Lemon Juice | 5 | 2 | 0.6 | 9.519 | Lemon Juice-5 | ||
| Lemon Juice | 5 | 3 | 0.6 | 9.558 | Lemon Juice-5 | ||
| Lemon Juice | 5.5 | 1 | 0.6 | 6.269 | Lemon Juice-5.5 | ||
| Lemon Juice | 5.5 | 2 | 0.6 | 4.639 | Lemon Juice-5.5 | ||
| Lemon Juice | 5.5 | 3 | 0.6 | 3.134 | Lemon Juice-5.5 | ||
| Acetic Acid | 4 | 1 | 42.01365 | 49.16 | Acetic Acid-4 | ||
| Acetic Acid | 4 | 2 | 46.14334 | 50.77 | Acetic Acid-4 | ||
| Acetic Acid | 4 | 3 | 41.74061 | 41.87 | Acetic Acid-4 | ||
| Acetic Acid | 4.5 | 1 | 23.03754 | 23.17 | Acetic Acid-4.5 | ||
| Acetic Acid | 4.5 | 2 | 23.68601 | 22.53 | Acetic Acid-4.5 | ||
| Acetic Acid | 4.5 | 3 | 26.65529 | 27.03 | Acetic Acid-4.5 | ||
| Acetic Acid | 5 | 1 | 3.481229 | 6.92 | Acetic Acid-5 | ||
| Acetic Acid | 5 | 2 | 5.972696 | 8.85 | Acetic Acid-5 | ||
| Acetic Acid | 5 | 3 | 3.447099 | 6.235 | Acetic Acid-5 | ||
| Acetic Acid | 5.5 | 1 | 0.6 | 1.78 | Acetic Acid-5.5 | ||
| Acetic Acid | 5.5 | 2 | 0.6 | 1.316 | Acetic Acid-5.5 | ||
| Acetic Acid | 5.5 | 3 | 0.6 | 0.6915 | Acetic Acid-5.5 | ||
| Acid | pH | rep | fe2 | tot_iron | acid_ph | ||
| Tap Water | 7.19 | 0 | 0.6 | 0.56 | Tap Water-7.19 | ||
| Tap Water | 7.19 | 0 | 0.6 | 0.36 | Tap Water-7.19 | ||
| Tap Water | 7.19 | 0 | 0.6 | 0.32 | Tap Water-7.19 | ||
| Ascorbic Acid | 4 | 1 | 30.10239 | 29.25 | Ascorbic Acid-4 | ||
| Ascorbic Acid | 4 | 2 | 23.27645 | 25.18 | Ascorbic Acid-4 | ||
| Ascorbic Acid | 4 | 3 | 28.56655 | 30.87 | Ascorbic Acid-4 | ||
| Ascorbic Acid | 4.5 | 1 | 4.607509 | 9.261 | Ascorbic Acid-4.5 | ||
| Ascorbic Acid | 4.5 | 2 | 5.494881 | 11.03 | Ascorbic Acid-4.5 | ||
| Ascorbic Acid | 4.5 | 3 | 4.914676 | 11.05 | Ascorbic Acid-4.5 | ||
| Ascorbic Acid | 5 | 1 | 0.6 | 2.497 | Ascorbic Acid-5 | ||
| Ascorbic Acid | 5 | 2 | 0.6 | 2.687 | Ascorbic Acid-5 | ||
| Ascorbic Acid | 5 | 3 | 0.6 | 4.094 | Ascorbic Acid-5 | ||
| Ascorbic Acid | 5.5 | 1 | 0.6 | 0.335 | Ascorbic Acid-5.5 | ||
| Ascorbic Acid | 5.5 | 2 | 0.6 | 1.112 | Ascorbic Acid-5.5 | ||
| Ascorbic Acid | 5.5 | 3 | 0.6 | 0.4022 | Ascorbic Acid-5.5 | ||
| Lemon Juice | 4 | 1 | 14.30034 | 36.2 | Lemon Juice-4 | ||
| Lemon Juice | 4 | 2 | 26.72355 | 39.03 | Lemon Juice-4 | ||
| Lemon Juice | 4 | 3 | 21.77474 | 26.2 | Lemon Juice-4 | ||
| Lemon Juice | 4.5 | 1 | 2.116041 | 18.26 | Lemon Juice-4.5 | ||
| Lemon Juice | 4.5 | 2 | 5.085324 | 20.89 | Lemon Juice-4.5 | ||
| Lemon Juice | 4.5 | 3 | 2.696246 | 17.41 | Lemon Juice-4.5 | ||
| Lemon Juice | 5 | 1 | 0.6 | 11.89 | Lemon Juice-5 | ||
| Lemon Juice | 5 | 2 | 0.6 | 9.519 | Lemon Juice-5 | ||
| Lemon Juice | 5 | 3 | 0.6 | 9.558 | Lemon Juice-5 | ||
| Lemon Juice | 5.5 | 1 | 0.6 | 6.269 | Lemon Juice-5.5 | ||
| Lemon Juice | 5.5 | 2 | 0.6 | 4.639 | Lemon Juice-5.5 | ||
| Lemon Juice | 5.5 | 3 | 0.6 | 3.134 | Lemon Juice-5.5 | ||
| Acetic Acid | 4 | 1 | 42.01365 | 49.16 | Acetic Acid-4 | ||
| Acetic Acid | 4 | 2 | 46.14334 | 50.77 | Acetic Acid-4 | ||
| Acetic Acid | 4 | 3 | 41.74061 | 41.87 | Acetic Acid-4 | ||
| Acetic Acid | 4.5 | 1 | 23.03754 | 23.17 | Acetic Acid-4.5 | ||
| Acetic Acid | 4.5 | 2 | 23.68601 | 22.53 | Acetic Acid-4.5 | ||
| Acetic Acid | 4.5 | 3 | 26.65529 | 27.03 | Acetic Acid-4.5 | ||
| Acetic Acid | 5 | 1 | 3.481229 | 6.92 | Acetic Acid-5 | ||
| Acetic Acid | 5 | 2 | 5.972696 | 8.85 | Acetic Acid-5 | ||
| Acetic Acid | 5 | 3 | 3.447099 | 6.235 | Acetic Acid-5 | ||
| Acetic Acid | 5.5 | 1 | 0.6 | 1.78 | Acetic Acid-5.5 | ||
| Acetic Acid | 5.5 | 2 | 0.6 | 1.316 | Acetic Acid-5.5 | ||
| Acetic Acid | 5.5 | 3 | 0.6 | 0.6915 | Acetic Acid-5.5 | ||
Homework Answers
install.packages("dplyr")
library(dplyr)
lif <- read.csv("lif.csv")
filtered_lif <- lif %>% filter(Acid != "Lemon Juice" & Acid != "Tap Water")
median_fe2 <- median(filtered_lif$fe2)
** If any confusion please comment
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