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Cleveland suggests charts' aspect ratios 'bank to 45 degrees'. How do I do calculate the optimal aspect ratio and apply it using ggplot?
A reference on the concept: https://eagereyes.org/basics/banking-45-degrees
You can use bank_slopes from the ggthemes package. Here's the documentation.
Also worth reading: a discussion of how well this principle holds up.
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Need help on interpreting the acf plot(sin graph pattern)
May be you will need to examine the PACF, you have a large peak in the first lag, followed by a decreasing wave that alternates between positive and negative correlations. Which can mean an autoregressive term of higher order in the data.
Use the partial autocorrelation function to determine the order of the autoregressive term.
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Is it possible to create correlation matrix in ggplot2 package that will include histograms and scatterplots of included variables?
I'm looking for something similar to the following graph generated with the gpairs() function from the YaleToolkit package.
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i want to fit a tweedie compound Poisson Gamma to my loss data using ptweedie.series R command. I am getting problems how to start with my fitting in R. Thanks in advance.
Performing such a fit is illustrated here:
library(tweedie)
example("tweedie-package")
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In how many different ways can a cube be painted by using three different colors of paint?
The answer of this is 45,
What if I change cube to cuboid?
Thanks!
I am preparing for job interview and this question is from CareeCup.
First, you should know how 45 is derived. That is by the use of permutation and combination.
Since a cuboid has the same number of sides as a cube, they should have the same answer. So the answer is 45.
But it is important to learn how the 45 is derived.
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I know it's not programming question but I thought we could all use the challenge :)
Link to diagram
Point A is the source of a laser. It is shinned at a single mirror and then reflected to another mirror finally arriving at point B ... see picture.
The goal is to find the total distance of all the lines.
I am not a student and this is not homework.
Same as a straight line from (-x, y) to (a, -b).
sqrt((a+x)^2 + (b+y)^2)