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Wolfgang Schwanghart


University of Postdam

Last seen: Today |  Active since 2007

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Professional Interests: GIS, Physical Geography, Hydrology, Geomorphology

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Question


Does imread read subsets from cloud-optimized geotiffs
Hi, cloud-optimized geotiff (COG) is a format to work with spatial raster data in the cloud (https://www.cogeo.org/). I am curr...

mer än ett år ago | 1 answer | 0

1

answer

Solved


Create a cell array out of a struct
Create a cell array out of a (single) struct with the fieldname in the first column and the value in the second column: in: ...

ungefär 2 år ago

Solved


Draw a '1' in a zero matrix!

ungefär 2 år ago

Solved


Flip the vector from right to left
Flip the vector from right to left. Examples x=[1:5], then y=[5 4 3 2 1] x=[1 4 6], then y=[6 4 1]; Request not ...

ungefär 2 år ago

Solved


Generate a vector like 1,2,2,3,3,3,4,4,4,4
Generate a vector like 1,2,2,3,3,3,4,4,4,4 So if n = 3, then return [1 2 2 3 3 3] And if n = 5, then return [1 2 2...

ungefär 2 år ago

Answered
Plot line with points at given distance
Since you are working with TopoToolbox, you might want to use the function getlocation. If you have a STREAMobj S, then you can ...

ungefär 2 år ago | 0

| accepted

Answered
Inverse distance weighting based on direction
Hi Christian, interesting question. First of all, if you follow the IDW-approach, you might save a lot of computing time using ...

ungefär 2 år ago | 0

| accepted

Submitted


TopoToolbox
A MATLAB program for the analysis of digital elevation models

nästan 3 år ago | 117 downloads |

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Submitted


subplotlabel
Label subplots in a composite figure

mer än 3 år ago | 1 download |

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Solved


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...

mer än 3 år ago

Solved


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] ...

mer än 3 år ago

Solved


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

mer än 3 år ago

Question


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...

mer än 4 år ago | 3 answers | 0

3

answers

Answered
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...

ungefär 5 år ago | 0

Answered
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...

mer än 5 år ago | 0

Submitted


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

ungefär 8 år ago | 1 download |

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Submitted


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

ungefär 9 år ago | 3 downloads |

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Solved


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

mer än 9 år ago

Question


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...

ungefär 10 år ago | 0 answers | 1

0

answers

Solved


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 ...

ungefär 10 år ago

Solved


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...

ungefär 10 år ago

Solved


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 ...

mer än 10 år ago

Solved


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

mer än 10 år ago

Solved


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

mer än 10 år ago

Solved


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'...

mer än 10 år ago

Solved


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...

mer än 10 år ago

Solved


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

mer än 10 år ago

Solved


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 [...

mer än 10 år ago

Solved


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; ...

mer än 10 år ago

Solved


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...

mer än 10 år ago

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