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# Kevin Holst

### US Air Force

Aktiv seit 2012

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Beantwortet
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 10 Jahre vor | 0

Gelöst

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

fast 11 Jahre vor

Gelöst

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 ...

fast 11 Jahre vor

Beantwortet
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...

fast 11 Jahre vor | 0

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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...

fast 11 Jahre vor | 0

Beantwortet
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...

fast 11 Jahre vor | 2

| akzeptiert

Beantwortet
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...

fast 11 Jahre vor | 1

| akzeptiert

Beantwortet
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...

fast 11 Jahre vor | 0

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

fast 11 Jahre vor | 1

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Beantwortet
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...

fast 11 Jahre vor | 0

Beantwortet
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...

fast 11 Jahre vor | 0

| akzeptiert

Beantwortet
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...

fast 11 Jahre vor | 0

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Beantwortet
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...

fast 11 Jahre vor | 0

Beantwortet
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; ...

fast 11 Jahre vor | 0

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Beantwortet
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') ...

fast 11 Jahre vor | 0

Beantwortet
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...

fast 11 Jahre vor | 0

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

fast 11 Jahre vor | 1

Beantwortet
geting value as Inf

fast 11 Jahre vor | 0

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

fast 11 Jahre vor | 1

Gelöst

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

fast 11 Jahre vor

Gelöst

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 ...

fast 11 Jahre vor

Gelöst

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

fast 11 Jahre vor

Beantwortet
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 ...

fast 11 Jahre vor | 2

Gelöst

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

fast 11 Jahre vor

Beantwortet
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...

fast 11 Jahre vor | 0

Beantwortet
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...

fast 11 Jahre vor | 1

| akzeptiert

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

fast 11 Jahre vor | 0

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Beantwortet
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...

fast 11 Jahre vor | 0

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