Steven Niggebrugge
Shell Asset Management Company B.V.
Followers: 0 Following: 0
Statistik
RANG
267.033
of 292.710
REPUTATION
0
BEITRÄGE
14 Fragen
0 Antworten
ANTWORTZUSTIMMUNG
28.57%
ERHALTENE STIMMEN
0
RANG
of 19.933
REPUTATION
N/A
DURCHSCHNITTLICHE BEWERTUNG
0.00
BEITRÄGE
0 Dateien
DOWNLOADS
0
ALL TIME DOWNLOADS
0
BEITRÄGE
0 Beiträge
BEITRÄGE
0 Öffentlich Kanäle
DURCHSCHNITTLICHE BEWERTUNG
BEITRÄGE
0 Highlights
DURCHSCHNITTLICHE ANZAHL DER LIKES
Feeds
Frage
Building random forest with cross-validation
Hi, i have been wondering for some time now how random forests (Bagging, or AdaBoost, doesn't matter) are built when using cros...
fast 4 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
Convert categorical back to integer
Hi, i convert an integer to a categorical a=[-1 0 1] b=categorical(a) now how do i convert b back to the same integers in a?...
mehr als 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Create cell array of numbers
Hi, how can i create a function that creates a cell array of number array 1:n, so the result is a cell array of string values. ...
mehr als 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Classification tree view function - predictor categories are replaced by numbers?
Hello, I created a classification ensemble tree using categorical predictors (typically 4 or 5 classes/labels for each predicto...
mehr als 4 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
predictorImportance for classification trees
Hello, would the predictorImportance() function also work for classification trees (random forest, AdaBoostM1 or Bag method)? ...
fast 5 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
Solve multivariate equation using fsolve()
Hi, i have written a multivariate function f(x, a, b, c). Holding a, b, c values fixed, i want to know for what value of x the...
etwa 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Replace values in each column by 0 after a pre-specified search value was found in that column
Hello, i have a matrix A, for example A = [1, 1; 0.5, 1; 0.5, 0.5; 1, 1] I want to insert 0 values in each column, but only if...
etwa 6 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
CreditDefaultCopula function not in my Matlab 2016a version, how to get it?
Hello, i would like to use Matlab's 2018 CreditDefaultCopula function to model defaults. How can i get this function in my Mat...
etwa 6 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
Replace values in matrix by first non-zero value in previous row
Hi, how can i replace zero values in a matrix by the first occurring non-zero value in that matrix if you would loop backwards...
mehr als 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to calculate maximum up to current point?
Hi, how can i calculate the an array of current maxima, i.e. for each point in the array to calculate the maximum from the first...
fast 7 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
100 Random numbers given t-distribution with mu = x% std = y% and df = 100?
How can i create a 100 x 2 array with random numbers, given the following distribution: -mu = 2% -sigma = 3% -df = 100 tha...
fast 7 Jahre vor | 1 Antwort | 0
1
AntwortGelöst
Enlarge array
Given an mxn numeric array (A) and a 1x2 vector (sz) indicating the dimensions [p q] to enlarge each element, return an (m*p)x(n...
etwa 7 Jahre vor
Gelöst
Flip the main diagonal of a matrix
Given a n x n matrix, M, flip its main diagonal. Example: >> M=magic(5); >> flipDiagonal(M) 9 24 1 ...
etwa 7 Jahre vor
Gelöst
Return the first and last character of a string
Return the first and last character of a string, concatenated together. If there is only one character in the string, the functi...
etwa 7 Jahre vor
Gelöst
Replace May with April
For instance, if the input is input_str = 'The flowers may bloom in April'; then the output is output_str = 'The flo...
mehr als 7 Jahre vor
Gelöst
Which values occur exactly three times?
Return a list of all values (sorted smallest to largest) that appear exactly three times in the input vector x. So if x = [1 2...
mehr als 7 Jahre vor
Gelöst
Simple equation: Annual salary
Given an hourly wage, compute an annual salary by multiplying the wage times 40 and times 50, because salary = wage x 40 hours/w...
mehr als 7 Jahre vor
Gelöst
Sort a list of complex numbers based on far they are from the origin.
Given a list of complex numbers z, return a list zSorted such that the numbers that are farthest from the origin (0+0i) appear f...
mehr als 7 Jahre vor
Gelöst
Determine whether a vector is monotonically increasing
Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...
mehr als 7 Jahre vor
Gelöst
Find all elements less than 0 or greater than 10 and replace them with NaN
Given an input vector x, find all elements of x less than 0 or greater than 10 and replace them with NaN. Example: Input ...
mehr als 7 Jahre vor
Gelöst
Swap the first and last columns
Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...
mehr als 7 Jahre vor
Gelöst
Determine if input is odd
Given the input n, return true if n is odd or false if n is even.
mehr als 7 Jahre vor
Gelöst
Select every other element of a vector
Write a function which returns every other element of the vector passed in. That is, it returns the all odd-numbered elements, s...
mehr als 7 Jahre vor
Gelöst
Make the vector [1 2 3 4 5 6 7 8 9 10]
In MATLAB, you create a vector by enclosing the elements in square brackets like so: x = [1 2 3 4] Commas are optional, s...
mehr als 7 Jahre vor
Frage
Surfl chart; datetime on y-axis, letters on x-axis
Hi, i am trying to make a 3d surface chart (surfl) out of a x-by-y table named 'cum_pl', which contains daily P&L numbers for x...
mehr als 7 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
Formula for calculating marginal risk contributions (video MATLAB for Advanced Portfolio Construction and Stock Selection Models)
Hi, i just watched the video https://nl.mathworks.com/videos/matlab-for-advanced-portfolio-construction-and-stock-selection-mod...
mehr als 7 Jahre vor | 1 Antwort | 0
1
AntwortGelöst
Find the sum of all the numbers of the input vector
Find the sum of all the numbers of the input vector x. Examples: Input x = [1 2 3 5] Output y is 11 Input x ...
fast 8 Jahre vor
Gelöst
Times 2 - START HERE
Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...
fast 8 Jahre vor
Frage
How can i generate month and year strings for Datetime vectors?
How can i generate month and year concatenated strings for Datetime vectors? E.g. i have vector ['01/Jan/2015';'01/Feb/2015']...
etwa 8 Jahre vor | 4 Antworten | 0