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Page 1206 of 2109
How to create a staircase plot in R?
The simple staircase plot can be created by using geom_tile function of ggplot2 package. We just need to use the vector or the column for which we want to create the staircase plot in place of x and y as well. For example, if we have a column say x of an R data frame df then the staircase plot can be created as ggplot(df, aes(x, x))+geom_tile().ExampleConsider the below data frame:> x df dfOutputx 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 10Loading ggplot2 package and creating staircase plot:> ...
Read MoreCount quadruples from four sorted arrays whose sum is equal to a given value x in C++
We are given four arrays A[], B[], C[] and D[]. The goal is to find all quadruples of elements of these arrays such that A[i]+B[j]+C[k]+D[l] =x. All four arrays have the same number of elements N.We will do this by traversing each array once and compare if A[i]+B[j]+C[j]+D[l]==x. If true increment count.Let’s understand with examples.Input A[]={ 1, 2, 3}; B[]={ 2, 3, 2}; C[]={ 4, 3, 1}; D[]={ 3, 1, 1 }; X=12Output Count of Quadruples: 4Explanation Quadruples such as ( A[i] B[j] C[k] D[l] ) are: (2 3 4 3) , (3 2 4 3), (3 3 3 3), (3 2 4 ...
Read MoreHow to create an exponential curve in R?
To create an exponential curve, we can use exp function inside the plot function for the variable that we want to plot. For example, if we have a vector x then the exponential curve for the vector x can be created by using plot(x,exp(x)). We can use the exponential function for the variable that is appropriate based on the objective of the analysis, here we have shown only an example of how it works.Example1> x plot(x,exp(x))OutputExample2> y plot(y,exp(y))Output
Read MoreHow to create a hierarchical cluster dendrogram in R?
A dendrogram display the hierarchical relationship between objects and it is created by using hierarchical clustering. In base R, we can use hclust function to create the clusters and the plot function can be used to create the dendrogram. For example, if we want to create the dendrogram for mtcars data then it can be done as shown below:> hc=hclust(dist(mtcars)) > plot(hc)Example1> head(mtcars)Outputmpg cyl disp hp drat wt qsec vs am gear carb Mazda RX4 21.0 6 160 110 3.90 2.620 16.46 0 1 4 4 Mazda RX4 Wag 21.0 6 160 110 3.90 2.875 17.02 0 1 4 4 ...
Read MoreCount number of trailing zeros in product of array in C++
We are given an array Arr[] of positive integers of size N. The goal is to count the number of trailing zeroes present in the product of all elements of the array.We will do this by counting the factors of each number. We will count 2 and 5 as factors of each number as the product of 2 and 5 is 10 which gives 1 trailing 0. In the end whichever count is smaller gives the count of trailing zeroes in the product. If we have 4 2’s and 6 5’s then there will be 4 trailing zeroes in the ...
Read MoreHow to create an arrow in base R?
To create an arrow R, we can use plot function and arrows function. We just need to understand all the coordinate values that should be passed inside the arrows function. For example, if we have two vectors that contains values from 1 to 10 then the arrow can be created by using arrows function as arrows(1,1,10,10).Example> x y plot(x,y)OutputExample> arrows(1,1,10,10)Output
Read MoreCount triplet pairs (A, B, C) of points in 2-D space that satisfy the given condition in C++
We are given an input of N points on a 2-D space. The goal is to find the count of triplets of points from the input such that one point is the mid-point on the line between the other two. i.e if triplet is (A, B, C) then B is midpoint of A and C ( or any other combination of A, B, C ).We will do this by inserting all points as pairs into a vector. Then add all pairs from this vector in set. By taking two points from the set check if the sum of (x, ...
Read MoreCount of lines required to write the given String in C++
We are given a string Str of alphabets and an array widths[]containing width of all English alphabets. The goal is to find the number of lines required to print this string on a page which has a width of 10 characters. Also print remaining characters.We will traverse the string check width of the current character and add it, if this sum >=10 increment number of lines.Let’s understand with examples.Input Str = "ababababab" widths[] = {2, 1, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 1, 1, 1, 2, 1, 1, 1};Output Count of ...
Read MoreHow to remove ticks in a plot created by using gglot2 in R?
In a plot created by using ggplot2, the axes values are generated with tick marks such as representing X-axis labels from 1 to 10 and Y-axis labels from 10 to 1 but we can get rid of this tick marks by using theme function. If we want to create a plot without ticks then we just need to add the following code to the plot code.theme(axis.ticks.x=element_blank(), axis.ticks.y=element_blank())ExampleConsider the below data frame.> set.seed(321) > x y df dfOutputx y 1 1.0426226 6.238295 2 0.9821990 4.855467 3 0.9930504 6.334253 4 0.9970088 3.552478 5 0.9969010 3.976679 6 1.0067046 5.128251 7 1.0181710 1.853243 8 ...
Read MoreCount unset bits in a range in C++
We are given an integer number let’s say, num and the range with left and right values. The task is to firstly calculate the binary digit of a number and then set the loop from the left digit till the right digit and then in the given range calculate the unset bits.Unset bits in a binary number is represented by 0. Whenever we calculate the binary number of an integer value then it is formed as the combination of 0’s and 1’s. So, the digit 0 is known as unset bit in the terms of the computer.Input − int number ...
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