MosaicCalc

by Renata Amalia Putri

Teknik Informatika UIN Maulana Malik Ibrahim

With respect to…

When a calculus or similar mathematical operation is being undertaken, you usually have to specify which variable or variables the operation is being done “with respect to.” To illustrate, consider the conceptually simple operation of drawing a graph of a function.

So, we’ll be using operations provided by the and packages for R. The operations from these packages have a very specific notation to express with respect to. That notation uses the tilde character Here’s how to draw the graph we want, using the package’s operation:mosaicmosaicCalc~slice_plot()

drug_remaining <- function(dose, duration, time_constant) {
  dose * exp(- duration / time_constant)
}

library(mosaicCalc)

## Loading required package: mosaic

## Registered S3 method overwritten by 'mosaic':
##   method                           from   
##   fortify.SpatialPolygonsDataFrame ggplot2

## 
## The 'mosaic' package masks several functions from core packages in order to add 
## additional features.  The original behavior of these functions should not be affected by this.

## 
## Attaching package: 'mosaic'

## The following objects are masked from 'package:dplyr':
## 
##     count, do, tally

## The following object is masked from 'package:Matrix':
## 
##     mean

## The following object is masked from 'package:ggplot2':
## 
##     stat

## The following objects are masked from 'package:stats':
## 
##     binom.test, cor, cor.test, cov, fivenum, IQR, median, prop.test,
##     quantile, sd, t.test, var

## The following objects are masked from 'package:base':
## 
##     max, mean, min, prod, range, sample, sum

## Loading required package: mosaicCore

## 
## Attaching package: 'mosaicCore'

## The following objects are masked from 'package:dplyr':
## 
##     count, tally

## 
## Attaching package: 'mosaicCalc'

## The following object is masked from 'package:stats':
## 
##     D

slice_plot(
  drug_remaining(dose = 100, time_constant = 4, duration = t) ~ t, 
  domain(t = 0:20))

A proper graph would be properly labelled, for instance the horizontal axis with “Time (days)” and the vertical axis with “Remaining drug (mg)”