Beantwortet
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...

fast 12 Jahre vor | 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...

etwa 12 Jahre vor | 0

Beantwortet
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]...

etwa 12 Jahre vor | 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...

etwa 12 Jahre vor | 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:...

etwa 12 Jahre vor | 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...

etwa 12 Jahre vor | 4

Beantwortet
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...

etwa 12 Jahre vor | 1

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Beantwortet
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...

etwa 12 Jahre vor | 2

Frage

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...

etwa 12 Jahre vor | 6 Antworten | 2

6

Antworten

Beantwortet
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...

etwa 12 Jahre vor | 11

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Beantwortet
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?...

mehr als 12 Jahre vor | 0

Beantwortet
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 ...

mehr als 12 Jahre vor | 0

Beantwortet
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(...

mehr als 12 Jahre vor | 0

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Beantwortet
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...

mehr als 12 Jahre vor | 0

Beantwortet
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) ...

mehr als 12 Jahre vor | 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...

mehr als 12 Jahre vor | 0

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Beantwortet
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 ...

mehr als 12 Jahre vor | 0

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Beantwortet
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...

mehr als 12 Jahre vor | 1

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Beantwortet
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...

mehr als 12 Jahre vor | 0

Beantwortet
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...

mehr als 12 Jahre vor | 2

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Beantwortet
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...

mehr als 12 Jahre vor | 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...

mehr als 12 Jahre vor | 1

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

mehr als 12 Jahre vor | 1

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Beantwortet
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 |...

mehr als 12 Jahre vor | 0

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Beantwortet
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...

mehr als 12 Jahre vor | 1

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Beantwortet
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...

mehr als 12 Jahre vor | 1

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Frage

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...

fast 13 Jahre vor | 1 Antwort | 0

1

Antwort

Frage

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...

fast 13 Jahre vor | 1 Antwort | 0

1

Antwort

Beantwortet
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...

etwa 13 Jahre vor | 1

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Beantwortet
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 =...

etwa 13 Jahre vor | 1

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