Community Profile # Kevin Holst

### US Air Force

Active since 2012

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How can I change contents of a string?
I'd say do something like this: names = strrep({data{:,1}},'/','-'); That assumes that all of the names are only in the ...

etwa 10 Jahre ago | 0

Solved

Sum of diagonal of a square matrix
If x = [1 2 4; 3 4 5; 5 6 7] then y should be the sum of the diagonals of the matrix y = 1 + 4 + 7 = 12

mehr als 10 Jahre ago

Solved

Given an unsigned integer x, find the largest y by rearranging the bits in x
Given an unsigned integer x, find the largest y by rearranging the bits in x. Example: Input x = 10 Output y is 12 ...

mehr als 10 Jahre ago

Calculate difference between two times
since you're getting this from a data file I'd suggest something like this: fid = fopen('data.txt'); data = textscan(fid...

mehr als 10 Jahre ago | 0

Loop Principal Component Analysis
I'd suggest looking at the help page a little more for PCA: http://www.mathworks.com/help/toolbox/stats/princomp.html "COE...

mehr als 10 Jahre ago | 0

Saving structs
If you're wanting to save the structure as a structure, don't put in the -struct flag. That saves all of the fieldnames as their...

mehr als 10 Jahre ago | 2

| accepted

breaking a column of strings in two different columns
It appears that you can't really do matrix operations on cell arrays like: mycell{:,2} = mycell{:,1}(3:end); So here's w...

mehr als 10 Jahre ago | 1

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Writing a matrix as column vectors
If Y is a workspace variable that is an m x n matrix, then you can extract the column vectors by: y1 = Y(:,1); etc. Is that...

mehr als 10 Jahre ago | 0

set default properties ERROR
It looks as though you may have a variable named 'set' in your workspace. Is that the case?

mehr als 10 Jahre ago | 1

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surf plot behaves strange!
Surf attaches a color to a face based on one point on that face, and each face will be created by 4 points, so that color may no...

mehr als 10 Jahre ago | 0

GRIDDATA suitability for interpolating from one mesh to another
griddata (in this case griddata3) is going to be removed in a future release of Matlab. Use TriScatteredInterp instead. I've use...

mehr als 10 Jahre ago | 0

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How to create random vectors of the same lengths?
from the documentation: Examples Generate values from the uniform distribution on the interval [a, b]. r = a + (b-a).*ra...

mehr als 10 Jahre ago | 0

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for loop
You can't call or write to a variable like that in a loop, unfortunately. My suggestion would be to have a structure that contai...

mehr als 10 Jahre ago | 0

Plot points with unknown column numbers
Here's the fix, sorry it took a while. Got distracted ;) figure(2) names = 1:1:rx; for i =1:1:rx name = i; ...

mehr als 10 Jahre ago | 0

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Plot points with unknown column numbers
did you turn hold back off? figure(2) names = 1:1:rx; for i =1:1:rx name = i; plot (fx,fy,'bo') ...

mehr als 10 Jahre ago | 0

geting value as Inf
Here's what I think your code should look like in order to run properly: M=100; r=0.8; alpha=0.45; beta=0.75; g...

mehr als 10 Jahre ago | 0

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Passing base workspace variables to callback functions
Have you tried using the evalin function, maybe something like: x = evalin('base','var');

mehr als 10 Jahre ago | 1

geting value as Inf
I actually answered your problem in your previous problem. The error is in your calculations for c, p, and specifically a. These...

mehr als 10 Jahre ago | 0

Rows
column1 = min(mat,[],2);

mehr als 10 Jahre ago | 1

Solved

Magic!
Check whether the input matrix is a normal magic square: <http://en.wikipedia.org/wiki/Magic_square> Output the logical va...

mehr als 10 Jahre ago

Solved

Count from 0 to N^M in base N.
Return an array of numbers which (effectively) count from 0 to N^M-1 in base N. The result should be returned in a matrix, with ...

mehr als 10 Jahre ago

Solved

Arrange Vector in descending order
If x=[0,3,4,2,1] then y=[4,3,2,1,0]

mehr als 10 Jahre ago

How can i get image from other GUI in a project - i can not use global variable
I'm assuming that the problem is you're unable to use the information you acquired from GUI2. Globals may work, but they're not ...

mehr als 10 Jahre ago | 2

Solved

pressure to dB?
given x ratio of pressure, find corresponding y dB

mehr als 10 Jahre ago

need help optimizing this code...
I don't think that will work actually. Try this, it's a little convoluted, but I think it's correct: % this assumes w and s...

mehr als 10 Jahre ago | 0

color-coding a 2D plot
unfortunately shading interp doesn't seem to work on contourf so here's an inelegant solution to your problem. [x,y] = mesh...

mehr als 10 Jahre ago | 1

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Problem with displaying output of executable
If you're compiling it as a 'Windows Standalone Application' switch that to a 'Console Standalone Application'.

mehr als 10 Jahre ago | 0

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color-coding a 2D plot
how about: [x,y] = meshgrid(-10:0.1:10,-10:0.1:10); % just to get some x and y values z = sqrt(x.^2 + y.^2); contour...

mehr als 10 Jahre ago | 0