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Kevin Holst


US Air Force

Active since 2012

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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 ...

meer dan 11 jaar ago | 0

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...

bijna 12 jaar 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...

bijna 12 jaar 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...

bijna 12 jaar ago | 2

| accepted

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...

bijna 12 jaar 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...

bijna 12 jaar 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?

bijna 12 jaar ago | 1

| accepted

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...

bijna 12 jaar 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...

bijna 12 jaar ago | 0

| accepted

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...

bijna 12 jaar 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...

bijna 12 jaar 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; ...

bijna 12 jaar ago | 0

| accepted

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') ...

bijna 12 jaar 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...

bijna 12 jaar 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');

bijna 12 jaar 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...

bijna 12 jaar ago | 0

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

bijna 12 jaar ago | 1

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 ...

ongeveer 12 jaar ago | 2

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...

ongeveer 12 jaar 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...

ongeveer 12 jaar 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'.

ongeveer 12 jaar ago | 0

| accepted

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...

ongeveer 12 jaar 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...

ongeveer 12 jaar ago | 0

Answered
Change position of numbers on x axes in surface plot
Perhaps something like this would work for you? grid off %this prevents the addition of gridlines at half spacing ha =...

ongeveer 12 jaar ago | 0

| accepted

Answered
Call variables in for loop
To do this like you're attempting requires the use of the eval function, but be very careful in its use. Google 'eval matlab' fo...

ongeveer 12 jaar ago | 0

| accepted

Answered
Measuring and Changing
if p1 and p2 are 2 element vectors: 1: d1 = sqrt(sum((p1-p2).^2)); 2: No explanation should be required. 3: d...

ongeveer 12 jaar ago | 0

Answered
Projectile connected by springs model
This is probably the 3rd or 4th submission of this same exact problem. Please review the question guide: <http://www.mathwork...

ongeveer 12 jaar ago | 0

Answered
To solve double integral
try using quad2d: <http://www.mathworks.com/help/techdoc/ref/quad2d.html>

ongeveer 12 jaar ago | 0

Question


plot data in from structure of data points with limits
I have a structure of datapoints, each of which is a structure of variables. I have created a simple function that will do a sca...

ongeveer 12 jaar ago | 0 answers | 0

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answers

Answered
Numerical Inputs to Solve and Using the Output value
The problem may be that you're expecting a single value, but solve will return 2 values because it's actually quadratic. What...

ongeveer 12 jaar ago | 0

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