Insert a code chunk to load the
palmerpenguins
and ggplot2
libraries and run
it.
Insert a code chunk to preview
the penguins
dataset (see item #2 in Section “Working with
the penguins dataset” of Module 1 Study Guide A) and run it.
How many categorical/qualitative/factor variables and how many
numerical/quantitative variables does this dataset have? How many
penguins does the dataset have?
Insert a code chunk to create a scatterplot of flipper length vs. body mass, putting the former on the y- and the latter on the x-axis.
Change the plot above so that the sex of each penguin is shown in color.
Add separate trendlines (straight) for males and females.
Add proper labels with units to the x-axis, y-axis, and the color legend, as well as an informative title.
What can we conclude about the relationship between flipper length and body mass and how it depends on sex?
An approximate formula for
determining the moles of double-stranded DNA (dsDNA) in a certain mass
(in grams) is \(m =
\frac{g}{w}\), where \(m\) is
the number of moles, \(g\) is the mass
in grams, and \(w\) is the molecular
weight (in Daltons) of the dsDNA molecule. The approximate molecular
weight of a single nucleotide is 650 Da. Therefore, the molecular weight
\(w\) of a dsDNA molecule of length
\(l\) is \(w
= 650 \times l\). Use R variables and expressions to compute the
moles in 60ng of a 1000bp long dsDNA molecule. Use scientific notation
to assign the mass in grams and length to variables g
and
l
respectively. Use l
and the formula for the
molecular weight \(w\) above to compute
the molecular weight and assign it to a variable w
. Use the
variables g
and w
and the formula for the
moles \(m\) above to compute the moles
and assign it to a variable m
. Print out the value of
m
.
Make a copy of your code below.
Determine the number of molecules \(n\)
from the moles \(m\) by multiplying
with the Avogadro’s constant (\(6.023 \times
10^23\)) and assigning the result to a variable n
.
Print out n
’s value.
Make a copy of the code below. The length of the human genome is 3.2 billion bp. Change the code to determine the number of human genomes in 60pg of dsDNA.
End of HW