> #Selecting rows using filter() > # Filter the rows for students with reading score greater than or equal 70. > filter(tab, read >= 70) id female race ses schtyp prog read write math science socst 1 95 0 4 3 1 2 73 60 71 61 71 2 103 0 4 3 1 2 76 52 64 64 61 3 1...
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Whenever you create an expression, the result of which is a “yes” or “no” value, you get a TRUE or FALSE— like in the case of 5 > 6 above. 5 is not greater than 6, so the expression becomes FALSE. Comparing myComparison to FALSE thus yields TRUE because the myComparison varia...
is not greater than or equal to $\ngeq$ ≱≱ is not greater than or eqaul to $\ngeqslant$ ⪈ is not greater than or equal to $\ngeqq$ ≱ is greater than not equal to $\gneq$ ⪈⪈ is greater than not equal to $\gvertneqq$ ≩ is greater than not similar to $...
Naturally, Boolean expressions can involve variables. Declare a variable namedvalue1and setvalue1equal to 1. Then write a Boolean expression that outputsTRUEifvalue1equals 1. value1=1value1>0 ## [1] TRUE In R, the expressions<=(less than or equal to),>=(greater than or equal to), an...
#' @param heights_equal If `"all"` (the default), every card in every row of the #' grid will have the same height. If `"row"`, then every card in _each_ row #' of the grid will have the same height, but heights may vary between rows. #' @param fill Whether or not to ...
## It seems that the version of `phantomjs` installed is greater than or equal to the requested version.To install the requested version or downgrade to another version, use `force = TRUE`. mv1 <- mapview(results.proj) mapshot(mv1, file = paste0(getwd(),"/map1.png")) ...
This sets the point colour to be dark blue instead of black. This is quite different than (maps) p + geom_point(aes(colour ="darkblue")) Thismaps(not sets) the colour to the value “darkblue”. This effectively creates a new variable containing only the value “darkblue” and then ...
CalculateSampleCovariance <-function(x, y, verbose =TRUE) {# Computes the sample covariance between two vectors.## Args:# x: One of two vectors whose sample covariance is to be calculated.# y: The other vector. x and y must have the same length, greater than one,# with no missing va...
The ggplot() function behaves as if a temporary variable was added to the data with with values equal to the result of the expression. In this case, the result of displ < 5 is a logical variable which takes values of TRUE or FALSE. This also explains why, in the earlier exercise, ...