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# Kevin Holst

### US Air Force

145 total contributions since 2012

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Answered
How do I create a legend and include loop variable values in the labels?
When you create a plot, you can specify the legend labels by setting the “DisplayName” property as name-value pair. Set the "Dis...

10 mois ago | 27

| accepted

Answered
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 ...

environ 7 ans 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

environ 7 ans 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 ...

environ 7 ans ago

Answered
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...

environ 7 ans ago | 0

Answered
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...

environ 7 ans ago | 0

Answered
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...

environ 7 ans ago | 2

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Answered
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...

environ 7 ans ago | 1

| accepted

Answered
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...

environ 7 ans ago | 0

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

plus de 7 ans ago | 1

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Answered
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...

plus de 7 ans ago | 0

Answered
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...

plus de 7 ans ago | 0

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Answered
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...

plus de 7 ans ago | 0

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Answered
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...

plus de 7 ans ago | 0

Answered
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; ...

plus de 7 ans ago | 0

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Answered
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') ...

plus de 7 ans ago | 0

Answered
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...

plus de 7 ans ago | 0

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

plus de 7 ans ago | 1

Answered
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...

plus de 7 ans ago | 0

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

plus de 7 ans 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...

plus de 7 ans 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 ...

plus de 7 ans ago

Solved

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

plus de 7 ans ago

Answered
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 ...

plus de 7 ans ago | 2

Solved

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

plus de 7 ans ago

Answered
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...

plus de 7 ans ago | 0

Answered
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...

plus de 7 ans ago | 1

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

plus de 7 ans ago | 0

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Answered
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...

plus de 7 ans ago | 0

Answered
Add label to TXT file
you could just add a simple fopen command prior to your dlmwrite command: fid = fopen('c:\data.txt','w'); fprintf(fid,'H...

plus de 7 ans ago | 0

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