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If you haven't sent your loved one a Valentine's Day greeting yet, it's not too late! Thanks to Guillermo Santos who pointed out an R script from Berkeley's Concepts in Computing with Data course, I created the following Valentine's Day card for my husband:

If you want to make one for your loved one, you can use the R code below (which I modified slightly from the original):

# Source: http://statistics.berkeley.edu/classes/s133/heart.r
heart1 = function(name){t = seq(0,60,len=100)plot(c(-8,8),c(0,20),type='n',axes=FALSE,xlab='',ylab='')
x = -.01*(-t^2+40*t+1200)*sin(pi*t/180)
y = .01*(-t^2+40*t+1200)*cos(pi*t/180)lines(x,y, lwd=4)lines(-x,y, lwd=4)text(0,7,"Happy Valentine's Day",col='red',cex=2.5)text(0,5.5,name,col='red',cex=2.5)}