Submitted

Fast morphological reconstruction of large logical masks.
MATLAB's imreconstruct is slow for large 3D logical masks. bwreconstruct is a faster replacement.

12 years ago | 1 download |

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Answered
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...

13 years ago | 1

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Answered
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 =...

13 years ago | 1

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Answered
how to use a parameter name list as input for a function?
Skirt, you were very close. You just need to use a cell array: %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% function out=try...

13 years ago | 0

Answered
Sort Group Data Trends
Anthony, here's a solution relevant to my comment above. Note that there are in fact *4* groups: 7k, *8k*, 11k, and 15k. nu...

13 years ago | 1

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Answered
square root of sum of squares on portions of cell arrays - Matlab Noob
out5 = {[0;0],[0;-162],[-54;72]} cellfun(@(vec)hypot(vec)*((-2*double(vec(1)<0))+1),out5) or cellfun(@(vec)sqrt(su...

13 years ago | 0

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Answered
Comparing strings with and without ' '
Hi Mini, first I'll make some strings myStrings = {'''Word''', 'Word'}; >> myStrings{1} ans = 'Word' >> myStrin...

13 years ago | 0

Answered
Pixel position of circle on image
Sangeeta, does this answer your question: center = [25 30]; %XY location of circle center radius = 15; matSize = 50; ...

13 years ago | 0

Answered
How to move an object from one plot to another inside a GUI using GUIDE
Vivekram, you can change any handle graphics "Parent" property. Here's a fully working example: function F = tmpfunc() ...

13 years ago | 0

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Question

Silhouette outline of polygon surface
I'm trying to get the outline of a triangulated 3D surface projected onto the XY plane. Here's an example. First, let's get a ...

13 years ago | 1 answer | 0

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Answered
writing large 3D .mat file into a .xls file
Salam, Here's some code that will at least get your data into excel in some form. You're right that excel has the <http://off...

13 years ago | 0

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Answered
Solving a system of equations in matlab
Hi E, There's a main issue that causes your problem here. Firstly, imagine that you had got inside your function _functionfil...

13 years ago | 0

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Answered
delete certain elements in a matrix
In a loop? Not really. All at once? Absolutely. DATA = rand(50,5); rowsToDelete = [1,6,11,21,26]; DATA(rowsToDelet...

13 years ago | 3

Answered
Experiences with release 2013a
As far as the help docs go, one issue that I had with the 2012b changes was the loss of context once you were reading a page (or...

13 years ago | 1

Question

Experiences with release 2013a
In the spirit of <http://www.mathworks.com/matlabcentral/answers/48070-experiences-with-release-2012b 2012b>: Did you try 201...

13 years ago | 5 answers | 0

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Answered
Adding a line to a plot without normalized coordinates
You were so close: figure scatter([0 10 20 30 40],[3 5 3 2 9]); hold on plot([0 40],[15 15],'-', 'Color','r') I...

13 years ago | 0

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Answered
How can I automatically save and index data from an internet database at a specified interval
MATLAB is reasonably well suited to do all the things you're looking for. Check out, for example, the <http://www.mathworks....

13 years ago | 0

Answered
Find unknown from the equation with given value
Hi Sheryl, If you have the Symbolic Maths toolbox, you can do something like: *Step 1*: Set up your equation. Note that you ...

13 years ago | 0

Answered
plotting evenly spaced lines across object
Hi Jakub, I think this does exactly what you're looking for. I've commented the code so it's easy to follow. Note that I've u...

13 years ago | 1

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Answered
import date from matlab to ms excel in the form 'HH:MM PM' using xlswrite
Hi Jovanie, The trick is to make sure excel receives a date in a format that it recognises as a date, and then let _excel_ ha...

13 years ago | 0

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Answered
how to convert cell datatype into uint8?
Hi Sivakumaran, A *cell* datatype is simply a container for _other_ datas. There is a function called *cell2mat* which will u...

13 years ago | 0

Answered
How to search for a specific string and only display the sentences that contains it.
Hi Sam, *regexp* is the most flexible way to go: testStrings = {'some text with hello','more with hello','nothing here',...

13 years ago | 0

Answered
Spacing in a heading for a table. (fprintf)
Hi Thomas, try this: fprintf('%11s%12s%12s%12s%12s%12s\n', 'AppNumb', 'gender','gpa','exp','lines','(bonus)'); fprintf('...

13 years ago | 1

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Answered
How to get the tag name?
To find the tag of axes1, you can just get it directly: Tag = get(handles.axes1,'Tag') However I would expect that the c...

13 years ago | 1

Solved

Convert a vector into a number
This is a sub problem related to this problem: <http://www.mathworks.com/matlabcentral/cody/problems/621-cryptomath-addition>...

13 years ago

Answered
Matlab question for cantilever beam
Hi Caroline, The problem is here: x= 0:0.1:L; U(x)= F./E.*I.*(x.^3-3.*L.*x.^2); I think you simply mean: x= 0...

13 years ago | 0

Answered
How Gradient is calcuted
Hi Tinkul, It is probably clearer if you call your variables *z* and *c* different names such as *dx* and *dy*. This is becau...

13 years ago | 0

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Solved

Find the largest value in the 3D matrix
Given a 3D matrix, A, find the largest value. E.g. >> A = 1:9; >> A=reshape(A,[3 1 3]); >> islargest(A) ans = 9

13 years ago

Solved

Counting Sequence
Given a vector x, find the "counting sequence" y. A counting sequence is formed by "counting" the entries in a given sequence...

13 years ago

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

13 years ago