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Wolfgang Schwanghart


University of Postdam

Last seen: 1日 前 2007 以来アクティブ

Professional Interests: GIS, Physical Geography, Hydrology, Geomorphology

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  • 6 Month Streak
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  • GitHub Submissions Level 3
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TopoToolbox
A MATLAB program for the analysis of digital elevation models

7ヶ月 前 | ダウンロード 61 件 |

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subplotlabel
Label subplots in a composite figure

11ヶ月 前 | ダウンロード 3 件 |

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Create an n-by-n null matrix and fill with ones certain positions
The positions will be indicated by a z-by-2 matrix. Each row in this z-by-2 matrix will have the row and column in which a 1 has...

11ヶ月 前

解決済み


Symmetry of vector
Determine whether the vector is symmetric or not (vector could be even or odd in length). For example: x = [1 2 3 3 2 1] ...

約1年 前

解決済み


Vector creation
Create a vector using square brackets going from 1 to the given value x in steps on 1. Hint: use increment.

約1年 前

質問


Fit Gaussian mixture model with weighted observations
Hi everyone, looking at the help of fitgmdist, I cannot see that there is the possibility to weight observations. Is there a rea...

約2年 前 | 3 件の回答 | 0

3

回答

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2D gaussian filter with a variable sigma
Hi Chad, below is some code that does the trick using nlfilter. To be more efficient, I created a look-up table with a finite s...

2年以上 前 | 0

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What makes a Toolbox a Toolbox, and how is it recognized by Matlab?
Hi Chad, the trick is to have a Contents.m-file in the main folder of your toolbox. In TopoToolbox, the file starts with T...

3年以上 前 | 0

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Non-crossing polynomial quantile regression
Non-crossing polynomial quantile regression

6年弱 前 | ダウンロード 4 件 |

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Flow Accumulation (upslope area)
Flow accumulation algorithm that routes through flats

7年弱 前 | ダウンロード 3 件 |

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解決済み


Box!
Given a box, find the volume of the cube. With each side = a.

約7年 前

質問


Customized icons in workspace
Hi all, I have written a couple of MATLAB classes and, as icing on the cake, I'd like to have customized icons in the worksp...

7年以上 前 | 0 件の回答 | 1

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回答

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index of n in magic(n)
let input=5; magic matrix 17 24 1 8 15 23 5 7 14 16 4 6 13 20 22 ...

8年弱 前

解決済み


Order of things - 1
Let's assume you have a number of calculations to perform, that depend on each other. E.g. 'A' can be calculated, once the outco...

8年弱 前

解決済み


Count decimal digits of a number
* Given an integer number you have to return the number of its digits. * For example 248 has 3 digits and 1589 has 4 digits ...

約8年 前

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Check if equal
Return true if all the elements of an nD array are equal, false otherwise.

約8年 前

解決済み


Add a row of zeros on top of a matrix
Given a matrix, insert a row of zeros as the top row.

約8年 前

解決済み


Too Many Zeros, Dump Them!
Sometimes when I create a matrix, I use this syntax: a = zeros(1000,1000); But when the function ends, I find that I don'...

約8年 前

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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...

約8年 前

解決済み


Pascal's pyramid
In Pascal's triangle each number is the sum of the two nearest numbers in the line above: 1 1 1 ...

8年以上 前

解決済み


Create an index-powered vector
Given a input vector x, return y as index-powered vector as shown below. Example x = [2 3 6 9] then y should be [...

8年以上 前

解決済み


Matrix to column conversion
Given a matrix of any size, convert it into a column vector. e.g A=[10 20 30; 40 50 60] then, B = [10; 40; ...

8年以上 前

解決済み


Find the index of the largest value in any vector X=[4,3,4,5,9,12,0,4.....5]
The given function returns the index of the maximum value in a given matrix. such as X=[4,3,4,5,9,12,0,5] Ans= 6 if maxim...

8年以上 前

解決済み


Free passes for everyone!
_Simply return the name of the coolest numerical computation software ever_ *Extra reward* (get a _freepass_): As an addit...

8年以上 前

解決済み


Number of digits in an integer
Specifies how many digits in a given integer. Example: in=100 ==> out=3

8年以上 前

解決済み


Generate a NaN...on purpose
The goal is to create a function that will return a single "NaN" without using the nan function. I am interested to see how many...

8年以上 前

解決済み


Finding peaks
Find the peak values in the signal. The peak value is defined as the local maxima. For example, x= [1 12 3 2 7 0 3 1 19 7]; ...

8年以上 前

解決済み


Find smallest integer type to accommodate your number
MATLAB supports 1-, 2-, 4-, and 8-byte storage for integer data. Find the smallest integer type to accomodate a scalar integer. ...

9年弱 前

問題


Find smallest integer type to accommodate your number
MATLAB supports 1-, 2-, 4-, and 8-byte storage for integer data. Find the smallest integer type to accomodate a scalar integer. ...

9年弱 前 | 3 | 25 個のソルバー

解決済み


Max index of 3D array
Given a three dimensional array M(m,n,p) write a code that finds the three coordinates x,y,z of the Maximum value. Example ...

9年弱 前

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