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Problem of inserting values into array within a for loop
Hi Kornelia, This one has a straight forward answer. perimeterLength = regionprops(blob, 'Perimeter'); will always re...

casi 11 años hace | 0

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How can I share image data between callbacks?
Hi Saurabh, This one has a simple solution. Note the call in your first function: handles.pushbutton1 = imread(uigetfile...

casi 11 años hace | 0

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Performing stats on subsections of a matrix
Hi Swisslog, Try this: a = [1 1 1 2 2 4; 3 5 4 7 2 5]; % Pack your matrix contents into a cell array [unqA,~,grps]...

casi 11 años hace | 0

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Why is my surf animation so slow?
Hi Phil, There are a few things you can do to speed this up. Firstly, the *pause* command will force your loop to sit idle...

casi 11 años hace | 0

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How do I change Grid Size in R2013a?
Hi Edgar, You can set the *XTick* locations of an axis (or the current one via *gca*) directly: tickValues = min(x):0.1:...

casi 11 años hace | 1

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Contributors metainfo: reputation and more
*Recent news:* ... and *BAM!* Walter hits *25,000*! Congratulations are in order again. It's impressive to see, but depressin...

casi 11 años hace | 4

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how to project images on the side walls of a 3D surf plot
Hi Konstantinos, Does this code get you on your way? R = 0:0.1:1; z = cos(-R); % that'd be your current y-f...

alrededor de 11 años hace | 1

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What's on your personal MATLAB to-do list?
A triangulation3d class which would basically inherit the standard triangulation class, but add useful features specifically for...

alrededor de 11 años hace | 2

Pregunta

What's on your personal MATLAB to-do list?
What MATLAB tools or functions have you been thinking about making but haven't quite gotten around to it? It can be something...

alrededor de 11 años hace | 6 respuestas | 2

6

respuestas

Respondida
Reading lines from a text file and storing them into an array.
Hi Surush, The trick is to put each line in an element of a cell array. Here's some commented code that does what you're t...

alrededor de 11 años hace | 11

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Error using surf() with colorbar and title
Hi Christian, try this: opengl('software') figure,surf(magic(99)),colorbar,title('Va') Does that sort it out as well?...

alrededor de 11 años hace | 0

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How to execute a function after the value of a property changed? Problems with callback function
If all of the observation of *PMV* is done by the *RB* class itself, so there's actually a better/cleaner way to do what you're ...

alrededor de 11 años hace | 0

Respondida
find intersection between two data sets
Hi Carlos, try this code: dataset = rand(20,2); zoneXY = rand(1,2); zoneRadius = rand(1); dists = sqrt(sum(bsxfun(...

más de 11 años hace | 0

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Interpolating vectors at specific points
Hi Christopher, here's a solution that does the job. If you can guarantee that you only have one crossing in your vector V, then...

más de 11 años hace | 0

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What am I doing wrong with object oriented programming?
Mark, you're almost there. Here's how to "just get it running": methods function q = calculateSin(this, x) ...

más de 11 años hace | 0

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how to calcuate mean with NaN
If you have the Statistics Toolbox, just replace calls to |mean()| with calls to |nanmean()|. If you don't have it, you can d...

más de 11 años hace | 0

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2D Contour colormap too dark.
Hi Marc, Got it. The RGB values you're copying in are 8-bit RGB colours of integers ranging from 0 to 255. You're right that ...

más de 11 años hace | 0

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Elevate a single isoline in a contour (2D) plot
Hi Marc, Is this what you're trying to do? [x,y,z] = peaks; z = z*10 figure [c,h] = contour(x,y,z,'LevelStep',2...

más de 11 años hace | 1

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update objects' coordinate of the same plot !!!!!!!!!!!!!!!!!!!
Hi Bolivar, Let's just go with one object first for simplicity: Here's the contents of the *user1* class: classdef us...

más de 11 años hace | 0

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How to convert binary image to 2D triangulation?
Geert, here's how I'd do it. Note that I use <http://www.mathworks.com/matlabcentral/fileexchange/30525-isocontour isocontour> f...

más de 11 años hace | 2

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How to convert 2D triangulation to binary image?
Hi Geert, Here's something that does what you want. It's not optimised for speed as it simply iterates naively through triang...

más de 11 años hace | 0

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Plotting 4d data with matrices.
Naty, as per the comment above I can't replicate your exact data, but here's an example that should show you how to make the fig...

más de 11 años hace | 1

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count of months spanned
Hi Leah, I think you can do this quite nicely as follows: startvecs = datevec(startdates); endvecs = datevec(enddates...

más de 11 años hace | 1

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Nested if statement won't execute
Perhaps the value of |i| is never set, or at least never set _in the scope of the loop that you are running_. Perhaps you mean |...

más de 11 años hace | 0

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Errors in solving nonlinear simultaneous equations
You can't plot a simultaneous equation during iterations in that way. If you instead put: options = optimoptions('fsolve...

más de 11 años hace | 1

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Retrieve all data from columns apart from id when using MySQL
Hi Gurvinder, Can I suggest that I think it would be easier for you to simply get _all_ the fields, and then just discard the...

más de 11 años hace | 1

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Pregunta

Equation of a constrained circle
I have a circle with known parameters (x,y,r): x = 37 y = -7 r = 38 I would like to find the parameters of a new c...

casi 12 años hace | 1 respuesta | 0

1

respuesta

Pregunta

Convert/decompose formula terms similarly to LinearModel
I'm trying to do something which must be implicitly done inside *LinearModel.predict()*, but I can't seem to get to it. The t...

casi 12 años hace | 1 respuesta | 0

1

respuesta

Respondida
Plotting elements of a matrix versus elements of another
Ryan, does this do what you wanted? X = rand(10,10) Y = X^2 figure, stem(X(:),Y(:)) The (:) operator will basicall...

casi 12 años hace | 1

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Respondida
Accessing values of fieldnames in a structure without using the fieldnames function
Hi Jess, Use parentheses: S = struct('field1',1,'field2',2) fieldStr = ['fields' num2str(1)] S.(fieldStr) ans =...

casi 12 años hace | 1

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