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 ...

mehr als 9 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 9 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 9 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 9 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 9 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 9 Jahre ago | 2

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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 9 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 9 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 9 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 9 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 9 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 9 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 9 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 9 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 9 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 9 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 9 Jahre ago | 1

geting value as Inf

mehr als 9 Jahre ago | 0

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

mehr als 9 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 9 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 9 Jahre ago

Solved

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

mehr als 9 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 9 Jahre ago | 2

Solved

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

mehr als 9 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 9 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 9 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 9 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 9 Jahre ago | 0